Answers
Answer: The answer is A, energy
Explanation: Did the test
Related Questions
Identify two factors that determine the state of matter
Answers
the kinetic energies of the particles (atoms,molecule,or ions)that make up up a substance. kinetic energy tends to keep the particles moving apart.
the attractive inter molecular forces between particles that tends to draw the particles together.
A horizontal force of 100 N is required to push a bookcase across a floor at a constant velocity.
Answers
The correct answer is :
Here 100 N force is applied to make the box move with constant velocity from rest. That means 100 N force is applied to overcome the limiting static friction and as soon as 100 N force is applied it starts moving.
Now,
Constant velocity means acceleration = 0
Net force acting on the box =mass × accelaration = mass × 0 = 0
Conceptually it is zero as it is balanced by kinetic friction which has equal value that of applied force. Because net force =Applied force - friction force and hence here friction force =applied force.
If there was any accelaration then there would exist a net force and then frictional force and applied force will be the same.
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Astronomers have proposed the existence of a ninth planet in the distant solar system. Its semi-major axis is suggested to be approximately 600 AU. If this prediction is correct, what is its orbital period in years
Answers
Answer:
T = 1.4696 10⁴ years
Explanation:
For this exercise we must use Kepler's laws, specifically the third law which is the application of the universal law of gravitation to Newton's second law
F = ma
G m M / r² = m a_c = m v² / r
G M / r = v²
the speed of the circular orbit is
v = 2π r / T
we substitute
G M / r = 4π² r² / T²
T² = (4π² / G M) r³
Kepler proved that this expression is the same if the radius is changed by the semi-major axis of an ellipse
T² = (4π² /GM) a³
the constant is worth
(4π² / GM) = 2.97 10⁻¹⁹ s² / m³
let's reduce the distance to SI units
AU is the distance from the Earth to the Sun
a = 600 AU = 600 AU (1.496 10¹¹ m / 1 AU)
a = 8.976 10¹³ m
T² = 2.97 10⁻¹⁹ (8.976 10¹³)³
T² = 21.4786 10²²
T = 4.63 10¹¹ s
Let's reduce to years
T = 4.63 10¹¹s (1 h / 3600s) (1 day / 24 h) (1 year / 365 days)
T = 1.4696 10⁴ years
What are the three major points of kinetic molecular theory?
Answers
Answer:
Explanation:
The simplest kinetic model is based on the assumptions that:
(1) the gas is composed of a large number of identical molecules moving in random directions, separated by distances that are large compared with their size;
(2) the molecules undergo perfectly elastic collisions (no energy loss) with each other and with the walls of the container, but otherwise do not interact; and
(3) the transfer of kinetic energy between molecules is heat. These simplifying assumptions bring the characteristics of gases within the range of mathematical treatment.
▼
Part D
The quantity represented by v is a function of time (i.e., is not constant).
True or false
Part E a particle moves with constant acceleration a. The expression VI +80 represents the particles velocity at what instant in time.
A. At a time T=zero
B. At the initial time
C. When a time tea has passed since the beginning of the particles motion, when its velocity was the vi
Answers
The amount indicated by is not fixed and changes over time. In situations where the linear acceleration is not zero, the velocity is always changing.
The first case is true
Since it depends on time, is not constant?
The amount indicated by is not fixed and changes over time. In situations where the linear acceleration is not zero, the velocity is always changing.
The dimension of the quantity albo will be ufa au av u t when calculating a particle's velocity as a function of time t using the formula v = a(1 - eb), where a and b are constants. (1 - e-b) Greutate, urb'a 221 Aich, a zat a2b3c faut Eleft.
The amount indicated by is not fixed and changes over time. When linear acceleration is absent .
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The quantity represented by v is a function of time (i.e., is not constant).
True or false
A particle moves with constant acceleration a. The expression VI +80 represents the particles velocity at what instant in time.
A. At a time T=zero
B. At the initial time
A particle starts from the origin at time t = 0 and moves along the positive x - axis. The graph of velocity with respect to time is shown in figure. What is the position of the particle at time t = 5s?
The movement of tectonic plates changes the surface of the Earth. Which type of plate boundary would most likely form a mountain range?
A. convergent boundary without subduction
B. convergent boundary with subduction
C. divergent boundary
D. transform boundary
Answers
Answer:
A. convergent boundary without subduction
Explanation:
The convergent boundary pushes together and makes the plates burst in an upward motion and creates a mountain.
The following graph shows the kinetic energy of a roller coaster car as it passes through a loop.
Roller Coaster Car's Kinetic Energy
O B.
Kinetic Energy (kilojoules)
OC.
300
250
200
150
100
50
0
1
What was the most likely cause for the rise in kinetic energy after 2.5 seconds?
A. The roller coaster was pulled with decreasing gravitational force.
The roller coaster began slowing down.
The roller coaster started gaining elevation.
O D. The roller coaster began speeding up.
2
3
Time (s)
Reset
Next Question
5
6
Answers
Both the object's speed and mass affect how much kinetic energy it contains. Motional energy is produced while the roller coaster descends. The roller coaster's bottom of the track position is where the most kinetic energy is produced. Kinetic energy changes to potential energy when it starts to rise.
Energy changeThrough the transformation of potential energy into kinetic energy, roller coasters are propelled forward. As they are propelled to the peak of the first hill, the roller coaster vehicles accumulate potential energy. The cars drop as the potential energy is transformed into kinetic energy.Kinetic energy is produced by converting potential energy. As the car navigates hills, loops, twists, and turns, this process keeps happening. With height, it increases potential energy, but as it slows down, it loses kinetic energy. Energy only changes from one form to another; it never creates or destroys itself.For more information on kinetic energy of roller coaster kindly visit to
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If you traveled 50m/s for 60 seconds, how far did you travel? Remember speed=distance/time
Question options:
300 m/s
500 m/s
3,000 m/s
300 km/h
Answers
Answer:
3,000 m
Explanation:
speed = distance/time
distance = speed * time
= 50 * 60
= 3000 m
What happens when you increase the amplitude of a sound? (this is science)
Answers
a car decelerates at a rate of 2.0 m/s^2 and comes to a complete stop after traveling 25 m. What was the speed of the car right before declaration?
Answers
Answer:
\( {v}^{2} = {u}^{2} + 2as \\ {0}^{2} = {u}^{2} + 2 (- 2)(25) \\ {u}^{2} = 100 \\ \therefore \: u = 10 \: m .{s}^{ - 1} \)
12. A coconut falls out of a tree 12.0 m above the ground and hits a bystander 3.00 m tall on the top of the head. It bounces
back up 1.50 m before falling to the ground. If the mass of the coconut is 2.00 kg, calculate the potential energy of the
coconut relative to the ground at each of the following sites:
(a) while it is still in the tree,
(b) when it hits the bystandlar on the head,
(c) when it bounces up to its maximum height,
(d) when it lands on the ground,
(e) when it rolls into a groundhog hole, and falls 2.50 m to the bottom of the hole,
Answers
Explanation:
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I need help with this question.What is freefall acceleration toward the sun at the distance of the earth's orbit?
Answers
Given:
The mass of the sun is
\(M\text{ = 1.99}\times10^{30}\text{ kg}\)The mean distance from the earth is
\(d=\text{ 1.5}\times10^{11}\text{ m}\)The mean radius of the sun is
\(r=\text{ 6.96}\times10^8\text{ m}\)To find the freefall acceleration toward the sun at the distance of the earth's orbit.
Explanation:
The total distance from the earth's orbit is
\(\begin{gathered} R\text{ = r+d} \\ =6.96\times10^8+1.5\text{ }\times10^{11} \\ =1.50696\text{ }\times10^{11}\text{ m} \end{gathered}\)The free-fall acceleration due to gravity is given by the formula
\(g\text{ =}\frac{GM}{R^2}\)Here, the universal gravitational constant is
\(G\text{ = 6.67 }\times10^{-11}\text{ m}^3\text{ kg}^{-1}s^{-2}\)On substituting the values, the free-fall acceleration will be
\(\begin{gathered} g=\frac{6.67\times10^{-11}\times1.99\times10^{30}}{(1.50696\times10^{11})^2} \\ =5.84\times10^{-3}\text{ m/s}^2 \end{gathered}\)Final Answer: The freefall acceleration toward the sun at the distance of the earth's orbit is 5.84 x 10^(-3) m/s^2
2 A rectangular storage tank 4 m long by 3 m wide is filled with paraffin to a depth
of 2 m. Calculate:
a the volume of paraffin
c the weight of paraffin
b the mass of paraffin
d the pressure at the bottom of the tank due
to the paraffin
1m
Answers
For a rectangular storage tank filled with paraffin to a depth of 2 m, the volume, weight, mass of paraffin, and pressure at the bottom of the tank are:
a. The volume is 24 m³.
b. weight is 240,000 N,
c. mass is 24,490 kg, and
d. pressure is 23,530 Pa.
a) The volume of paraffin in the rectangular storage tank can be calculated using the formula:
Volume = Length x Width x Depth
Given:
Length = 4 m
Width = 3 m
Depth = 2 m
Substituting the values into the formula, we have:
Volume = 4 m x 3 m x 2 m
Volume = 24 m³
Therefore, the volume of paraffin in the tank is 24 cubic meters.
b) The weight of the paraffin can be calculated using the formula:
Weight = Volume x Density x Acceleration due to gravity
The density of paraffin varies, but we can assume a typical value of 10,000 kg/m³. The acceleration due to gravity is approximately 9.8 m/s². Substituting these values into the formula:
Weight = 24 m³ x 10,000 kg/m³ x 9.8 m/s²
Weight = 240,000 N
Therefore, the weight of the paraffin in the tank is 240,000 Newtons.
c) The mass of the paraffin can be calculated using the formula:
Mass = Density x Volume
Substituting the given values:
Mass = 10,000 kg/m³ x 24 m³
Mass = 24,490 kg
Therefore, the mass of the paraffin in the tank is 24,490 kilograms.
d) The pressure at the bottom of the tank due to the paraffin can be calculated using the formula:
Pressure = Weight / Area
The area of the bottom of the tank is equal to the length multiplied by the width. Substituting the values:
Area = 4 m x 3 m
Area = 12 m²
Pressure = 240,000 N / 12 m²
Pressure = 20,000 Pa
Therefore, the pressure at the bottom of the tank due to the paraffin is 20,000 Pascals (Pa).
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draw diagram of how a reflecting telescope works. show how the angles of reflection would work with mirrors placed at 2 different angles
Answers
Lenses, which are pieces of curved, clear glass, were employed in early telescopes to focus light.
What is Telescope?Curved mirrors are used by the majority of telescopes nowadays to collect light from the night sky. Light is focused by a telescope's mirror or lens' shape.
Astronomers use a telescope to observe distant things. Curved mirrors are used by the majority of telescopes, including all large telescopes, to collect and concentrate light from the night sky.
The original telescopes employed lenses, which are simply curved pieces of clear glass, to focus light. The "optics" of a telescope are the mirrors or lenses. Strong telescopes may view objects that are extremely faint and incredibly far away.
Therefore, Lenses, which are pieces of curved, clear glass, were employed in early telescopes to focus light.
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The moon Umbriel orbits Uranus (mass = 8.68 x 10^25 kg) at a distance of 2.66 x 10^8 m. What is Umbriel's orbital period (in hours)?
Answers
Answer:
T = 99.51 hour
Explanation:
Mass of Uranus, \(M=8.68\times 10^{25}\ kg\)
The moon Umbriel orbits Uranus at a distance of \(2.66\times 10^8\ m\)
We need to find Umbriel's orbital period. Let it is T. Using Kepler's third law of motion to find it.
\(T^2\propto r^3\\\\T^2=\dfrac{4\pi^2r^3}{GM}\\\\T^2=\dfrac{4\pi^2\times (2.66\times 10^8)^3}{6.67\times 10^{-11}\times 8.68\times 10^{25}}\\\\T=358244.51\ s\)
As 1 hour = 3600 s
358244.51 s = 99.51 hour
Hence, Umbriel's orbital period is 99.51 hour.
Answer:
Explanation:
its 99.51 im not just saying that because of the person on top of me but i have all my notes from physics and from chemistry and from biology from when i was on acellus! but the top of me is right :)
How would taping a coin to the balloon affect the overall motion of the balloon?
Answers
Answer:
the motion of the coin taping the balloon is the balloon squshing down
tính chỉ số ampe kế thay ampe kế bằng vô kế có điện trở rất lớn thì vô kế chỉ bao nhiêu
Answers
Answer:
I don't understand it.....
A 4kg ball is at rest on perfectly smooth plane which is in horizontal position.A force of 10 N is applied horizontally to the ball.the distance travelled after 6second is ---------m.
Answers
The distance travelled by a ball of 4 kg after 6 seconds when a force of 10 N is applied to it is 45 m
What is distance?
Distance can be defined as the length between two points.
To calculate the distance traveled by the ball after 6 seconds, first we need to find the acceleration of the ball using
F = ma......... Equation 1Where:
F = Force applied to the ball = 10 Nm = Mass of the ball = 4 kgMake a the subject of the equation
a = F/m............ Equation 2Substitute these values above into equation 2
a = 10/4a = 2.5 m/s²Finally to find the distance traveled by the ball, we use
S = ut+at²/2......... Equation 3Where:
S = Distance traveled by the ballt = 6 sa = 2.5 m/s²u = 0 m/s (At rest)Substitute into equation 3
S = (0×6)+(6²×2.5)/2S = 45 mHence, the distance traveled by the ball is 45 m.
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What is the best way to evaluate a claim found on a product label?
O A. Buy the least expensive product.
OB. Ask the store that sells the product.
C. Use an unbiased source of information.
O D. Assume the claim is true.
Answers
Answer:
B. or C.
Explanation:
I am pretty sure that answer B. is correct because A. is the trick question and D. you most likely know that that isnt right.
Pot holder should have high insulation and low _____.
Answers
Potholder should have high insulation and low conductivity, therefore the correct answer is the option B
What is insulation?Insulation is a type of material used to create barriers to the transmission of the form of energy which either is in form of heat or electricity.
For outdoor trips in cold weather, several thin layers act as better insulating barriers for heat transfer.
The ability of an electric charge or heat to pass through a material is measured by its conductivity. A material is considered a conductor if it offers very little resistance to the flow of thermal or electric energy.
Thus, Potholders should be highly insulated and have low conductivity, therefore the correct answer is the option B
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your question seems incomplete, the complete question is
To be effective, a pot holder should have low _____. viscosity conductivity malleability density
A proton traveling vertically upward (out of the page) experiences a magnetic force directed North. The direction of the magnetic field is_________.Group of answer choicesdown (into the page)SouthEastWest
Answers
To find:
The direction of the magnetic force.
Explanation:
The direction of the magnetic field or a magnetic force on a charged particle is given by the right-hand rule. It states that when the thumb, middle finger, and index finger are held in such a way that they are perpendicular to each other if the thumb is pointing in the direction of the positive charge and the middle finger is pointing in the direction of the magnetic force then the index finger will point in the direction of the magnetic field.
Thus applying this rule we find that the index finger will be pointing to the east.
Final answer:
Thus the direction of the magnetic field is east.
Object 1 with mass 1=3.25 kg
is held in place on an inclined plane that makes an angle
of 40.0∘
with the horizontal. The coefficient of kinetic friction between the plane and the object is 0.535.
Object 2 with mass 2=4.75 kg
is connected to object 1 with a massless string over a massless, frictionless pulley. The objects are then released.
Calculate the magnitude
of the initial acceleration.
Calculate the magnitude
of the tension in the string once the objects are released.
Answers
The magnitude of the initial acceleration of the object is 4.2 m/s².
The tension in the string once the object starts moving is 13.65 N.
What is the magnitude of the initial acceleration?The magnitude of the initial acceleration of the object is calculated by applying Newton's second law of motion as follows;
F(net) = ma
m₂g - μm₁g cosθ = a(m₁ + m₂)
where;
m₁ and m₂ are the masses of the blocksg is acceleration due to gravityμ is coefficient of frictionθ is the angle of inclinationa is the acceleration(4.75 x 9.8) - (0.535 x 3.25 x 9.8 x cos40) = a(3.25 + 4.75)
33.5 = 8a
a = 33.5/8
a = 4.2 m/s²
The tension in the string once the object starts moving is calculated as;
T = m₁a
T = 3.25 x 4.2
T = 13.65 N
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A motor hoists a mass m = 60 kg crate at a constant velocity to a height of h = 5 m in 2 s. If the indicated power of the motor is 3.2 kW, determine the motor's efficiency.
Answers
31) what is the energy required to change 20g of copper, whose specific heat is 0.39j/gc,
change from 20 to 40 degrees?
Answers
Explanation:
given :
m = 20 g
sh = 0.39 J/g°C
∆T = 40-20 = 20°C
Find the Energy!
solution :
E =m. sh. ∆T
= 20 × 0.39 × 20
= 156 J
So, energy required is
Energy = mass*sh*∆T
Energy = 20g*0.39j/g°c*20°
Energy = 156joule✅
~Physics#1
An atom that loses an electron is called a/an
A. Valence electron
B. bond
C. anion
D. cation
Answers
draw a sample displacement verses time graph for a car that drives away at a constant speed from a point and has no initial speed. Label any known values.
Answers
On a graph of distance vs time, a straight line indicates that a car speed is constant.
Velocity is the pace and direction of an object's movement, whereas speed is the time rate at which an object is travelling along a path. In other words, velocity is a vector, whereas speed is a scalar value.On a speed-time graph, a horizontal line denotes a constant speed. On a speed-time graph, an inclining line denotes an acceleration. The sloping line indicates that the object's speed is varying. Either the item is accelerating or decelerating. Distance and displacement appear to have the same meaning, they actually have very different definitions and implications. Displacement is the measurement of how far an object is out of place, whereas distance refers to ,how much ground an object has covered during its motion.Therefore, when a car moves with constant speed the the distance time graph is in straight line.
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An aluminum-alloy rod has a length of 10.000 cm at 20.000C and a length of 10.015 cm at the boiling point of water. (a) What is the length of the rod at the freezing point of water
Answers
The Length of the rod at the freezing point of water is 9.9625 cm
What is length?Length can be defined as the measurement of the distance between two points. The S.I unit of length is meter (m)
To calculate the length of the rod at the freezing point of water, we use the formula below
Formula:
(L₃-L₁)/L₁(t₃-t₁) = (L₂-L₁)/L₁(t₂-t₁)................ Equation 1Where:
L₁ = length of the aluminum alloy rod at 20 °CL₂ = Length of the aluminum alloy rod at boiling point.L₃ = Length of the aluminum alloy rod at freezing point.t₁ = Initial temperature of the aluminum alloy rodt₂ = Temperature of the aluminum alloy rod at the boiling point of water.t₃ = Temperature of the aluminum alloy rod at the freezing point of water.From the question,
Given:
L₁ = 10 cmL₂ = 10.015 cmt₁ = 20 °Ct₂ = 100 °C (boiling point of water)t₃ = 0 °C ( Freezing point of water)L₃ = ?Substitute these values into equation 1
(L₃-10)/[10(0-20)] = (10.015-10)/[10(100-20)]Solve for L₃
(L₃-10)/(-200) = 0.015/80L₃-10 = (-200)(0.015/80)L₃-10 = -0.0375L₃ = 10-0.0375L₃ = 9.9625 cm.Hence, The Length of the rod at the freezing point of water is 9.9625 cm.
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Four balls have the same temperature. Which ball has the most thermal
energy?
A. Golf ball
B. Bowling ball
C. Tennis ball
D. Basketball
Answers
Answer:
a bowling ball because it has the most mass.
It’s B because the bowling ball has a greater weight and greater mass too it.
What is the density of a 36 g object with a volume of 15 cm3? (Density: D = )
0.42 g/cm3
0.54 g/cm3
2.4 g/cm3
5.4 g/cm3
Answers
Answer:
density = mass/volume
so . . .
density = (36 g)/(15 cm³) = 2.4 g/cm³
Explanation:
If the current density is 1.55 and the drift velocity is , how many charge carriers are present? The charge on electron is .(Enter your answer to three significant figures.)
Answers
Answer:
There are \(9.053\times 10^{14}\) charge carriers.
Explanation:
Given that,
Current density (current per unit time), \(\dfrac{I}{A}=1.55\ A/cm^2=0.000155\ A/m^2\)
The drift velocity of the electron, \(v_d=107\ cm/s=1.07\ m/s\)
We need to find the no charge carriers present. The formula for drift velocity is given by :
\(v_d=\dfrac{I}{neA}\\\\\text{n is no of charge carriers}\\\\n=\dfrac{I}{eAv_d}\\\\n=\dfrac{0.000155}{1.6\times 10^{-19}\times 1.07}\\\\n=9.053\times 10^{14}\)
So, there are \(9.053\times 10^{14}\) charge carriers.