Provided the diameter of the fire hose is 7.0 cm, and the water running through the hose flows at 420 L/min, how much force does she need to hold the nozzle, if its diameter is 0.75 cm?
Answers
Answer:
the amount of force needed to hold the nozzle is 1100 N
Explanation:
Given that;
The diameter of the fire horse is 7.0cm
The radius of the fire horse is d/2 = 7.0/2 = 3.5 cm = 0.035 m
the water running through the hose flows at 420 L/min = 0.42 m³/ 60 sec
The diameter of the nozzle = 0.75 cm
The radius of the nozzle = d/2 = 0.75/2 = 0.375 cm = 0.00375 m
Amount of force needed to hold the nozzle = ??
Using equation of continuity product
\(A_1v_1 = A_2v_2\)
where
\(A_1\) = cross sectional area of the hose
\(v_1\) = velocity of water flow at hose
\(A_2\) = cross sectional area of the nozzle
\(v_2\) = velocity of water flow at nozzle
Making \(v_1\) the subject of the formula; we have
\(v_1 = \dfrac{A_2v_2}{A_1}\)
Also making \(v_2\) the subject of the formula:
\(v_2 = \dfrac{A_1v_1}{A_2}\)
Also; from newton's law; we all know that F = ma
where ;
m = mass
a = acceleration
\(a = \dfrac{\Delta v}{t} \\ \\ a = \dfrac{v_2-v_1}{t}\)
So ;
\(F = m \dfrac{v_2-v_1}{t}\)
Also ; mass = density × volume
\(m =\rho *V\)
\(F = \rho V \dfrac{v_2-v_1}{t}\)
\(F = \dfrac{\rho V}{t}[ \dfrac{A_1v_1}{A_2}- \dfrac{A_2v_2}{A_1}]\)
Replacing \(A_2v_2\) by \(A_1v_1\) from above ; so
\(F = \dfrac{\rho V}{t}[ \dfrac{A_1v_1}{A_2}- \dfrac{A_1v_1}{A_1}]\)
\(F = \dfrac{\rho V}{t} A_1 v_1 [ \dfrac{1}{A_2}- \dfrac{1}{A_1}]\)
where the product of cross section area of velocity is equal to the volume of water and its time flow;
SO;
\(A_1v_1 = \dfrac{V}{t}\)
Replacing that into what we have above; we have:
\(F = \dfrac{\rho V}{t} \dfrac{V}{t} [ \dfrac{1}{A_2}- \dfrac{1}{A_1}]\)
\(F ={\rho }( \dfrac{V}{t})^2 [ \dfrac{1}{A_2}- \dfrac{1}{A_1}]\)
Where;
A = πr²
\(F ={\rho }( \dfrac{V}{t})^2 [ \dfrac{1}{\pi r^2_2}- \dfrac{1}{\pi r^2_1}]\)
\(F ={(1000*10^3 \ kg/m^3) }( \dfrac{0.42 m^3 }{60 sec})^2 [ \dfrac{1}{\pi (0.00375)^2}- \dfrac{1}{\pi (0.035)^2}]\)
F = 1100 N
Thus; the amount of force needed to hold the nozzle is 1100 N
Related Questions
the value of 1.0004 to the power 1 by 2 using Binomial approximation is
Answers
Given:
The given value is \((1.0004)^{\frac{1}{2}}\).
To find:
The value of the given expression by using the Binomial approximation.
Explanation:
We have,
\((1.0004)^{\frac{1}{2}}\)
It can be written as:
\((1.0004)^{\frac{1}{2}}=(1+0.0004)^{\frac{1}{2}}\)
\((1.0004)^{\frac{1}{2}}=1+\dfrac{1}{2}\times 0.0004\) \([\because (1+x)^n=1+nx]\)
\((1.0004)^{\frac{1}{2}}=1+0.0002\)
\((1.0004)^{\frac{1}{2}}=1.0002\)
Therefore, the approximate value of the given expression is 1.0002.
Prove that the two equations shown below are equivalent.
F = ma and F = p/t
Answers
Newton’s Second Law of Motion is defined as Force is equal to the rate of change of momentum. For a constant mass, force equals mass times acceleration.
\(\Delta p = mv - mu \\\\\implies \Delta p = m(v-u) \\\\F = \dfrac{\Delta p}{\Delta t} = \dfrac{m(v-u)}{\Delta t} = ma\)
F = ma is the formula of Newton’s Second Law of Motion.
To prove Newton's second law of motion,
Given Force F = Δp/Δt
What is relation between F = ma and F = Δp/Δt?Newton’s Second Law of Motion is defined as Force is equal to the rate of change of momentum. The second law of Newton can be described as the acceleration of an object which produces a net force is directly proportional to the magnitude of the net force, in the same path i.e., direction as the net force, and inversely proportional to the mass of the object.As the acceleration has its magnitude and direction it is a vector quantity.Proof for F=ma
Let us consider an object of mass m, moving along a straight line with an initial velocity u, final velocity v and it has some particular time t and thus Momentum can be related as,
For initial velocity u, p1 = m × u
The final velocity v, p2 = m × v
The change in momentum can be expressed as
p2 – p1 = (m × v) – (m × u)
p2 – p1 = m (v – u)
Here, we know that the rate of change of momentum with respect to time is proportional to the applied force.
The applied force F,
F ∝ [m (v – u)]/t
F ∝ m × a
As acceleration (a) is the rate of change of velocity with respect to time.
F = k × m × a
F = ma
where k can be the constant.
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when looking at a motion with constant acceleration the velocity , how to determine if increasing or decreasing
Answers
Answer:
a = (v2 - v1) / t
For constant acceleration (positive) v2 (final velocity) must be greater than v1 (initial velocity)
Note that velocity is a vector quantity in this equation
For instance in the case of a freely falling body one might have v1 as 9.8 m/s and v2 as 29.4 m/s in 3 sec giving
a = (-29.4 - (-9.8)) / 3 = -19.6 m/s^2 where the positive direction was chosen as upwards and the acceleration is negative or downwards
The following statements are about voltage, current, and power.
Select all that are True.
a. The electric current in a series circuit is the same everywhere in the circuit.
b. The electric current in a circuit does not flow through the battery.
c. In a series circuit consisting of resistors, LEDs, light bulbs and a battery; the sum of the voltage drops across the resistors, LEDs and light bulbs in the circuit equals the voltage boost by the battery.
d. An amp is the same thing as a coulomb per second.
e. A volt is the same as a joule/coulomb.
f. A circuit has to be broken in order to measure the voltage across a component with a multimeter.
g. Electric power is destroyed when current moves through a resistor.
Answers
The following statements are true:
(a). The electric current in a series circuit is the same everywhere in the circuit. (c). In a series circuit consisting of resistors, LEDs, light bulbs, and a battery, the sum of the voltage drops across the resistors, LEDs, and light bulbs in the circuit equals the voltage boost by the battery.
(d). An amp is the same thing as a coulomb per second.
(e). A volt is the same as a joule/coulomb.
a. In a series circuit, the electric current remains the same throughout the circuit. This is because there is only one path for the current to flow, and it encounters the same amount of resistance in each component.
c. In a series circuit, the total voltage supplied by the battery is divided among the resistors, LEDs, and light bulbs. The sum of the voltage drops across these components is equal to the voltage provided by the battery. This is based on Kirchhoff's Voltage Law, which states that the total voltage around a closed loop in a circuit is zero.
d. An ampere (amp) is a unit of electric current, and it is defined as one coulomb of charge passing through a point in one second. Therefore, an amp is equivalent to a coulomb per second.
e. A volt is a unit of electric potential difference or voltage. It represents the amount of energy required to move one coulomb of charge between two points in a circuit. Hence, a volt is equivalent to a joule per coulomb.
In a series circuit, the current remains constant throughout the circuit because there is only one path for the current to flow. As the current encounters different components such as resistors, LEDs, and light bulbs, the voltage drops across each component. The sum of these voltage drops is equal to the voltage supplied by the battery, according to Kirchhoff's Voltage Law.
An ampere is the unit of electric current and is defined as one coulomb of charge passing through a point in one second. This means that in one second, a charge of one coulomb represents an ampere of current. Similarly, a volt is the unit of electric potential difference or voltage. It represents the energy required to move one coulomb of charge between two points in a circuit. To measure the voltage across a component in a circuit, a multimeter can be used without breaking the circuit. By connecting the multimeter in parallel across the component, the voltage can be measured without interrupting the flow of current.
Electric power is not destroyed when current moves through a resistor. In fact, electric power is dissipated as heat in a resistor due to the resistance encountered by the current. This is governed by Ohm's Law, which states that power is equal to the product of voltage and current (P = VI). Therefore, as current passes through a resistor, power is converted to heat.
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what is the critical angle of light going from air (n=10) into glass (n=15)?
Answers
The critical angle for light going from air into glass is approximately 48.6°.
To find the critical angle for light going from air (n\(_{1}\) = 1.0) into glass (n\(^{2}\) = 1.5), you can use the formula for the critical angle, which is:
Critical Angle = arcsin(n\(^{2}\) / n\(^{1}\))
Substitute the values of n\(_{1}\) and n\(^{2}\) into the formula.
Critical Angle = arcsin(1.5 / 1.0)
Calculate the value inside the parentheses.
Critical Angle = arcsin(1.5)
Find the arcsin of the value calculated in step 2.
Critical Angle ≈ 48.6°
So, the critical angle for light going from air into glass is approximately 48.6°.
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a juggler demonstrates his abilities by keeping a 2.3-kg pipe wrench, a 1.5-kg hatchet, and a 1.0-kg hammer flying through the air above his head. the white circles on the graph represent the positions of the center of mass of each of the flying objects at one instant. what are the x and y coordinates of the center of mass for the system of these three objects?
Answers
To find the x and y coordinates of the center of mass for the system of these three objects, we need to calculate the weighted average of the x and y coordinates of each individual object.
First, let's label the objects:
- Pipe wrench: mass = 2.3 kg
- Hatchet: mass = 1.5 kg
- Hammer: mass = 1.0 kg
Next, let's denote the x and y coordinates of each object's center of mass on the graph:
- Pipe wrench: (x1, y1)
- Hatchet: (x2, y2)
- Hammer: (x3, y3)
To calculate the x coordinate of the center of mass (x_cm), we use the formula:
x_cm = (m1*x1 + m2*x2 + m3*x3) / (m1 + m2 + m3)
Substituting the given values, we get:
x_cm = (2.3*x1 + 1.5*x2 + 1.0*x3) / (2.3 + 1.5 + 1.0)
Similarly, to calculate the y coordinate of the center of mass (y_cm), we use the formula:
y_cm = (m1*y1 + m2*y2 + m3*y3) / (m1 + m2 + m3)
Substituting the given values, we get:
y_cm = (2.3*y1 + 1.5*y2 + 1.0*y3) / (2.3 + 1.5 + 1.0)
By plugging in the specific x and y coordinates for each object, you can calculate the x_cm and y_cm values for the system of these three objects.
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who was the first president of the united states
Answers
Answer:
George Washington
Explanation:
Answer:
well for me
Explanation:
It was George Washington
If a net force acts on an object, the object may change speed, change direction or do neither.
True
False
Answers
Answer:
False
Explanation:
A net force on an object causes acceleration or a change in direction....not 'neither'
It is false that if a net force acts on an object, the object may change speed, change direction or do neither. Details about motion can be found below.
What is Newton's law of motion?Newton's first law of motion also called law of inertia states that an object will remain at rest until it is acted upon by an external force.
This law suggests that an object will change direction or speed when acted upon by a net force.
Therefore, it is false that if a net force acts on an object, the object may change speed, change direction or do neither.
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A gymnast with mass 50kg suspends herself from lower end of a hanging rope, upper end of the rope is attached to the ceiling. What is the weight of gymnast? Which of the Newton’s law related to your calculation? if gymnast fall with an acceleration of 2m/s2 , what is the force on the rope?
Answers
Answer:
I. Weight = 490 Newton
II. Newton's Second Law of Motion
III. Force = 100 Newton
Explanation:
Given the following data;
Mass = 50 kg
Acceleration = 2 m/s²
I. To find the weight of the gymnast;
Weight = mass * acceleration due to gravity
We know that acceleration due to gravity is equal to 9.8 m/s².
Weight = 50 * 9.8
Weight = 490 Newton
II. Newton's Second Law of Motion states that the acceleration of a physical object is directly proportional to the net force acting on the physical object and inversely proportional to its mass.
Mathematically, it is given by the formula;
Force = mass * acceleration
\( F = ma\)
III. To find the force, we would use the following formula;
\( F = ma \)
\( F = 50 * 2\)
Force = 100 Newton
What is the impulse of a 20 kg car that is traveling 30 m/s, hitting an another car and slowing down to 10 m/s? How long did it take the car to stop if it had an applied force of 200N acting on it?
Answers
To find the impulse of the car, we can use the formula:
impulse = force x time
We know the mass of the car is 20 kg, and the change in velocity is 30 m/s - 10 m/s = 20 m/s. We can use the impulse-momentum theorem, which states that impulse equals the change in momentum:
impulse = change in momentum = mass x change in velocity
So, impulse = 20 kg x 20 m/s = 400 Ns
To find the time it took the car to stop, we can rearrange the impulse formula to solve for time:
time = impulse / force
Plugging in the values, we get:
time = 400 Ns / 200 N = 2 seconds
Therefore, the impulse of the car was 400 Ns, and it took 2 seconds for the car to stop with an applied force of 200N.
A weightlifter takes 0.5s to raise a barbell with 2 free-weights from the ground to a height of 0.9m. If each free-weight has a mass of 30kg and the barbell has a mass of 20kg, calculate how much power the weightlifter produces when lifting the barbell?
Answers
Answer:
P = 1412.82 [Watt]
Explanation:
First we must calculate the total mass that makes up the barbell and the two free weights at each end of the barbell.
\(m=30+30+20\\m= 80 [kg]\)
Weight is now defined as the product of mass by gravitational acceleration.
\(w=m*g\)
where:
m = mass = 80 [kg]
g = gravity acceleration = 9.81 [m/s²]
\(w=80*9.81\\w=784.8[N]\)
Now using the product of the weight by the distance traveled we can calculate the work.
\(W=w*d\)
where:
W = work [J]
w = weight = 784.8 [N]
d = distance = 0.9 [m]
\(W=784.8*0.9\\W=706.41[J]\)
And power is defined as the relationship of work at a certain time. The potency is expressed by means of the following formula.
\(P=W/t\\P=706.41/0.5\\P=1412.82[W]\)
HELP PLEASE!!!!
Research has shown that it is important to get exercises from the following areas:
a.
Endurance, strength, bone strengthening, and flexibility.
b.
Physical activity, strength, aerobics, and flexibility.
c.
Strength, muscle strengthening, cardio and flexibility.
d.
Bone strengthening, cardio, yoga, and flexibility
Answers
Answer:
a kasi a dapat a
Explanation:
a tama sa maka tulong
Answer:
A
Explanation:
Other options contain some type of exercises while option A contains the benefits of exercises.
Using the picture below, what must take place for the book to move in the direction of the movement arrow?
-A force must be applied to the top of the book to make sure that it is equal to the force of friction.
-The friction of the table must increase and the friction of the book decrease to allow for movement.
-The friction must be removed for any movement to take place.
-A force in the direction of the desired movement must be applied causing the forces to be unbalanced.
Answers
For the book to move in the direction of the movement arrow, a force in the direction of the desired movement must be applied causing the forces to be unbalanced.
option D is the correct answer.
What is the Newton's first law of motion?Newton's first law of motion states that an object at rest or uniform motion in a straight line will continue in that path unless it is acted upon by an external force and it will move in the direction of the applied force.
Also, from Newton's second law of motion, which states that the force applied to an object is directly proportional to the product of mass and acceleration of the object.
Mathematically, Newton's second law of motion is written as;
F (net) = ma
F - Ff = ma
where;
F is the applied force on the objectFf is the force of friction opposing the motion of the objectm is the mass of the objecta is the acceleration of the object.Thus, for the book to move, the force of friction must be overcame by the applied force and this create an unbalanced force acting on the book. Also, the book will move in the direction of the net force acting on it.
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A 1. 1 kg box drops two meters from a shelf and comes to rest after 0. 021 s on the floor. What force did the box hit the floor
Answers
A 1 kg box falls two metres from a shelf and lands on the ground after 0.021 seconds. The box impacted the ground with a force of around 524.7 N.
The box impacted the ground with a force of around 524.7 N.
Explanation: We can determine the force using the equation F = m * (v/t), where m is the box's mass, v is the velocity change (which is the ultimate velocity because the box starts at rest and comes to a halt), and t is the time it takes for the box to stop.
Given that the box falls 2 metres and its terminal velocity is 0 m/s, v = 2 m/s.
524.7 N is equal to F = 1.1 kg * (2 m/s / 0.021 s).
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A 10-cm long pencil is placed upright 50 cm from a concave mirror with focal length 0.50 m. What will be
the characteristics of any image that is formed?
Answers
A virtual and erect image is formed by concave mirror.
What is focal length?The focal length of the mirror is the distance between the lens and the image sensor.
It is also defined as the distance from a lens or mirror to the focal point.
It is also stated by the formula
\(\frac{1}{y} +\frac{1}{u} = \frac{1}{f}\)
u = -50 cm and f = 0.50 m (50cm)
\(\frac{1}{v} +\frac{1}{-50} =\frac{1}{50}\)
v= -50 cm
where - sign shows that image is virtual.
Magnification m= \(\frac{v}{u}\)
m = -50/50
m = 0
hence, virtual and erect image will be formed.
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average method and it reports the tollowing unit data tor the rorming department. Units completed in the torming department are transferred to the painting department. Production cost information for the forming department follows. . Calculate the equivalent units of production for both direct materials and conversion for the Forming department. o. Calculate the costs per equivalent unit of production for both direct materials and conversion for the Forming department c. Using the weighted average method, assign costs to the forming department's output-specifically, its units transferred to painting and its endina work in brocess inventorv. Calculate the costs per equivalent unit of production for both direct materials and conversion for the For Jsing the weighted average method, assign costs to the forming department's output-specifically, its 4 d its ending work in process inventory. Complete this question by entering your answers in the tabs below. Calculate the equivalent units of production for both direct materials and conversion for the forming department. a. Calculate the equivalent units of production for both direct materials and conversion for the Forming departm b. Calculate the costs per equivalent unit of production for both direct materials and conversion for the Forming c. Using the weighted average method, assign costs to the forming department's output-specifically, its units tra and its ending work in process inventory. Complete this question by entering your answers in the tabs below. Calculate the costs per equivalent unit of production for both direct materials and conversion for the forming department Required information Using the weighted average method, assign costs to the forming department's output-specifically, its units trar painting and its ending work in process inventory.
Answers
Given information: The average method reports the following unit data for the forming department. Units completed in the forming department are transferred to the painting department. Production cost information for the forming department follows.
Direct materials:
Units completed during the period = 45,000 units
Ending work in process inventory = 5,000 units
Direct materials cost = $202,500
Conversion costs:
Units completed during the period = 45,000 units
Ending work in process inventory = 5,000 units
Conversion cost = $189,000
a. Calculation of equivalent units of production for both direct materials and conversion for the forming department:
Equivalent units of production = Units completed during the period + (Ending work in process inventory * Degree of completion)
Direct materials:
Equivalent units of production = 45,000 + (5,000 * 50%) = 47,500 units
Conversion costs:
Equivalent units of production = 45,000 + (5,000 * 60%) = 48,000 units
b. Calculation of the cost per equivalent unit of production for both direct materials and conversion for the forming department:
Cost per equivalent unit of production = Total cost for the period / Equivalent units of production
Direct materials:
Cost per equivalent unit of production = $202,500 / 47,500 units = $4.26 per unit
Conversion costs:
Cost per equivalent unit of production = $189,000 / 48,000 units = $3.94 per unit
c. Calculation of the cost assigned to the forming department's output using the weighted average method:
Total cost = Cost of units transferred out + Cost of ending work in process inventory
Cost of units transferred out = Number of units transferred out * Cost per equivalent unit of production
Cost of ending work in process inventory = Number of units in ending work in process inventory * Cost per equivalent unit of production
Direct materials:
Cost of units transferred out = 40,000 * $4.26 per unit = $170,400
Cost of ending work in process inventory = 5,000 * $4.26 per unit = $21,300
Total cost = $170,400 + $21,300 = $191,700
Conversion costs:
Cost of units transferred out = 40,000 * $3.94 per unit = $157,600
Cost of ending work in process inventory = 5,000 * $3.94 per unit = $19,700
Total cost = $157,600 + $19,700 = $177,300
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What about a wave will make bend more or less?
Answers
The amount of bend in a wavelength is determined by it’s frequency. The higher the frequency, the more bends.
Which physical property is best measured using only a balance? A. Density B. Volume C. Color D. Mass
Answers
Answer:
D. Mass
hope it helps
Explanation:
Mass is commonly measured with a balance
a ball is held at rest at the top of a hill. the ball is then released and starts rolling down the hill. at the bottom, it reaches level ground and keeps rolling along the ground. consider the level ground at the bottom of the hill as zero height. select the type or types of energy the ball has at the top of the hill.
Answers
Gravitational Potential Energy is the type of energy the ball has at the top of the hill.
What is meant by Gravitational Potential Energy ?The energy that an item has due to its location in a gravitational field is known as gravitational potential energy. For an object close to the surface of the Earth, when the gravitational acceleration may be considered to remain constant at around 9.8 m/s, gravitational potential energy is most frequently used.Gravitational potential energy may be defined as an energy that has a connection to gravitational force or gravity.If an item is placed at a height above (or below) the zero height, it has gravitational potential energy. If an item is not in its equilibrium position on an elastic material, it has elastic potential energy.Learn more about Gravitational Potential Energy refer to :
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PLEASE ANSWER FAST WILL GIVE BRAINLY!!!! BUT ONLY IF YOU KNOW!!!!!!
what happens outside of the nucleus?
Answers
Answer:
Within the nucleus, DNA molecules, the cell's genetic machinery, are stored, repaired, transcribed and eventually replicated. Around the outside of the nucleus is an envelope consisting of two layers of membrane.
Explanation:
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g neglecting heat losses in the system, what is the amount of time t will it take to boil the water in the cup?
Answers
The initial temperature of the water, the heat source, and the volume of water being boiled are some of the variables that affect how long it takes to boil water.
How do you calculate the amount of heat that water loses?4.18 J/g/°C is the specific heat capacity of water. What we are interested in is the quantity of heat, or Q. To do this, we would apply the formula Q = m•C•T. The m, C, and T can be calculated using the initial and final temperatures.
What's the heat equation?How much heat is gained or lost by a sample can be calculated using the equation q = mcT, where m is the mass of the sample, c is the T represents the change in temperature, while S is specific heat (q).
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the total energy of a system is 300j. if the potential energy is 40j what is the kinetic energy if the object started 300m above the ground?
Answers
Answer:
43.3 m/s.
Explanation:
Assuming the potential energy is due to the gravitational potential energy, we can use the conservation of energy to find the kinetic energy:
Total energy = Potential energy + Kinetic energy
Kinetic energy = Total energy - Potential energy
Kinetic energy = 300 J - 40 J = 260 J
However, we need to know the mass of the object to convert the kinetic energy to velocity. We can use the potential energy to find the mass:
Potential energy = mgh
40 J = m(9.81 m/s^2)(300 m)
m = 0.137 kg
Now we can use the kinetic energy to find the velocity:
Kinetic energy = (1/2)mv^2
260 J = (1/2)(0.137 kg)v^2
v^2 = (2*260 J) / 0.137 kg
v = 43.3 m/s (rounded to one decimal place)
Therefore, the kinetic energy is 260 J and the velocity of the object when it reaches the ground is 43.3 m/s.
Two packages are connected by a very light string that goes over an ideal pulley as shown in the figure. Package A has a mass of 3.0 kg and can slide along a rough plane inclined at 30° above the horizontal. The string acts on package A parallel to the surface of the plane. The coefficient of static friction between package A and the plane is 0.40. What minimum mass should package B have in order to start package A sliding up the ramp?
Answers
To find the minimum mass of package B that is needed to start package A sliding up the ramp, we can use the force of friction. The force of friction is given by:
Friction = friction coefficient * normal force
The normal force is the force perpendicular to the surface of the ramp and is equal to the weight of package A (3.0 kg * 9.8 m/s^2) times the cosine of the angle of the ramp (cos 30° = 0.866). So:
friction = 0.40 * (3.0 kg * 9.8 m/s^2 * 0.866)
friction = 10.5 N
The force needed to start package A sliding up the ramp is equal to the force of friction. To provide this force, package B needs to weigh at least:
mass of package B = force / (g)
mass of package B = 10.5 N / 9.8 m/s^2
The mass of package B = 1.07 kg
Therefore, package B must have a minimum mass of 1.07 kg to start package A sliding up the ramp.
After a package is dropped from the plane, how long will it take for it to reach sea level from the time it is dropped? Assume that the package, like the plane, has an initial velocity of 322 km/hour in the horizontal direction. answer in numerically in seconds
Answers
Answer:
Below
Explanation:
First of all, the horizontal speed is irrelevant to the question...not needed.
The time to hit the ground can be computed by
HEIGHT = 1/2 a t^2 where a = 32.2 ft/s^2 or 9.81 m/s^2
solve this for 't' in seconds
as the HEIGHT was not given in the question, this cannot be answered though you can say t = sqrt ( 2 * height / a )
All weather stations have to make weather observations at the same time of the day.
True
False
Answers
Answer:
false
Explanation:
Answer:
True
Explanation:
The answer is true do not listen to the other person they will get you wrong just look at the votes between mine and the other person's (hint like my answer and rate 5 stars so other people know what to pick)
Marco wants to buy the used sports car with the greatest acceleration. Car a can go from 0 m/s to 17. 9 m/s in 4. 00 s. Car b can accelerate from 0 m/s to 22. 4 m/s in 3. 50 s. Car c can go from 0 to 26. 8 m/s in 6. 00 s. Rank the three cars from greatest acceleration to least.
Answers
From greatest acceleration to least the three cards are ranked as 1. car b, 2. car a, 3. car c.
A body that starts from initial velocity U and end the motion with a final velocity V in time t will have an acceleration given by,
a = (U-V)/t
The initial velocity of car a is 0m/s and the final velocity of car a is 17.9m/s the time taken by car a is 4 seconds.
Putting the values in the above relation, we get,
a₁ = 17.9/4
a₁ = 4.475m/s².
The initial velocity of the car b is zero and the final velocity of car b is 22.4 and the time taken by the car b is 3.5 seconds.
Putting values in the formula, we get acceleration a2,
a₂ = 22.4/3.5
a₂ = 6.4m/s².
Initial velocity of the car c is 0m/s, the final velocity of the car c is 26.8m/s and the time taken by the car c is 6 seconds.
Putting values in the formula, we get acceleration a3,
a₃ = 26.8/6
a₃ = 4.466m/s².
Ranking of the cars on the basis of the acceleration from Greater acceleration to the least is first car b, then car a, and then car c.
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If clouds were made of cotton-candy what is rain
Answers
Answer:
If clouds were made of cotton candy, I think rain would be soda.
Or liquified sugar.
:)
Answer:
Liquid Sugar
Explanation:
For an example, let's look at normal clouds. They're made of water vapor, and when they rain it's because the water vapor condenses and forms a droplet heavy enough that it falls out of the sky. In both sides of the equation, they're still made out of water. So, logically, cotton candy is made almost 100% with sugar, right? All that's happened is the sugar is heated and liquified and pushed through very small holes until they cluster together and form the fluffy treat you know today. Back to the leading question, though: "If clouds were made of cotton-candy, what is rain?". Rain is the liquid form of clouds (gas), and cotton candy is the (solid) form of itself. So in order for it to rain, it needs to liquefy itself. When melted at 367°F, sugar becomes a liquid, so in that case THAT is what cotton candy would rain if it were a cloud.
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if you increase the number of slits in an array (but keep the spacing between adjacent slits the same), what happens to the diffraction pattern? the distance between the centers of the bright fringes decreases. the width of the bright fringes decreases. the number of bright fringes decreases. the number of bright fringes increases. the distance between the centers of the bright fringes increases. the width of the bright fringes increases.
Answers
If you increase the number of slits in an array but keep the spacing between adjacent slits the same, the effect on the diffraction pattern is that the width of the bright fringes decreases.
To summarize, increasing the number of slits in an array while keeping the spacing between adjacent slits constant leads to a decrease in the width of the bright fringes in the diffraction pattern.
When two laser beams collide, light and dark bands are seen as bright fringes. They take place as a result of wave interference. Two waves that collide interact with one another. The phase difference between the waves affects how strongly this wave interaction occurs.
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When an electron is removed from a neutral atom, it becomes....
A) A positive ion
B) a negative ion
C) heavier
D) a bipolar atom
Answers
Answer:
A
Explanation:
the early copernican system for planetary motions is____
Answers
The early Copernican system for planetary motions is a model of the "solar system".
What is the Copernican system?Copernicus developed his system based on observations of the planets and his belief in the simplicity and elegance of a heliocentric, or Sun-centered, model. He argued that the observed movements of the planets could be explained more accurately and consistently by assuming that the planets orbited the Sun in circular orbits, rather than the complex and erratic epicycles of the geocentric model.
The Copernican system placed the Sun at the center of the solar system, with the Earth and other planets orbiting around it in circular paths. This was a radical departure from the previous geocentric model, which held that the Earth was the center of the universe and that all celestial bodies revolved around it.
Thus, the early Copernican system for planetary motions is a model of the "solar system".
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