What condition must be satisfied for the acceleration of a falling object to be equal to the gravitational field?

Explanation:

Fnet = ma

The acceleration of the body is -1N/kg. If the forces acting on the body are simultaneous and in equilibrium, then the net force acting on the body must be zero.

Here, the mass of the body is given as 2kg. Let us assume that the body's acceleration is "a" when the 3N force is removed while the forces acting on the body are in equilibrium. Using the following equation:

⇒2N + 4N + ma = 0

We can simplify the equation as:

⇒6N + 2ma = 0

When the 3N force is removed, the equation becomes:

⇒2N + ma = 0

Now, using the above equation, we can calculate the value of a:

⇒ma = -2N

⇒a = -2N / m

Given that m = 2kg, we get:

⇒a = -2N/(2kg) 

⇒a = -1N/kg

Therefore, the acceleration of the body is -1N/kg. Here, the negative sign denotes that acceleration is in the opposite direction.

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Answer:

The wavelength result is 3 m. Most common velocities: Light in vacuum (air) = 300,000 km/s. Light in water = 225,000 km/s. Sound in air = 340 m/s. Sound

Explanation:

the answer is 3m

So, the trout swam at a steady speed of 166.67 centimeters per second.

To find the speed of the trout, we'll need to divide the distance it swam (4,000 centimeters) by the time it took (0.4 minutes). Since we want the speed in centimeters per minute, we'll first convert 0.4 minutes into seconds to make our units consistent.

Step 1: Convert 0.4 minutes to seconds
0.4 minutes * 60 seconds/minute = 24 seconds

Step 2: Calculate the speed of the trout
Speed = Distance / Time
Speed = 4,000 centimeters / 24 seconds

Step 3: Simplify the calculation
Speed = 166.67 centimeters/second (rounded to 2 decimal places)

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Answer:

The answer is B, velocity.

Explanation:

Just took the quiz. Hope this helps! Please count as braniliest.

Answer:

The answer is velocity.

Explanation:

Remember velocity is the speed of something in a given direction.

and beside i just took the quiz ♡

Answer:

there are six types of joints in the human body

Answer: The answer is D. 6

Explanation: Learned in health class a while ago.

It will take approximately 0.75 μs for the function generator with a 50 Ω output resistance to charge the gate of the RFD3055LE MOSFET from 0 V to the maximum Vth of 4 V using a 5 V input.

We need to calculate the time it will take for the function generator to charge the gate of the RFD3055LE MOSFET from 0 V to the maximum threshold voltage (Vth) specified in the datasheet using a 5 V input.
First, we need to find the capacitance of the gate of the MOSFET. According to the datasheet, the typical gate capacitance (Ciss) of the RFD3055LE is 1500 pF.
Next, we can use the formula Q=CV to calculate the charge (Q) required to charge the gate of the MOSFET to the maximum Vth. Assuming the maximum Vth is 4 V (as stated in the datasheet), we get:
Q = CV
Q = 1500 pF x 4 V
Q = 6 nC
Now, we can use another formula to calculate the time it will take to charge the gate from 0 V to 4 V using the 50 Ω output resistance of the function generator and a 5 V input. The formula is:
t = RC ln((Vmax - Vmin)/Vmax)
where t is the time, R is the resistance, C is the capacitance, Vmax is the final voltage (4 V), and Vmin is the initial voltage (0 V).
Substituting the values, we get:
t = 50 Ω x 1500 pF x ln((4 V - 0 V)/4 V)
t = 0.75 μs

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Answer:

The law of the conservation of mechanical energy states that the total mechanical energy of a closed system remains constant, unless there is work done by non-conservative forces or heat transfer to or from the system.

In other words, the law states that the sum of the kinetic energy (energy of motion) and potential energy (energy due to position) of a system remains constant as long as there are no non-conservative forces acting on the system. Non-conservative forces are forces that dissipate energy, such as friction and air resistance. If these forces are present, they will convert some of the mechanical energy of the system into other forms of energy, such as heat or sound.

For example, if you lift a book off the ground, you are doing work on the book, which increases its potential energy. At the same time, the kinetic energy of the book decreases, because it is not moving. If you then release the book, it will fall to the ground, converting its potential energy back into kinetic energy. If there are no non-conservative forces present, the sum of the kinetic energy and potential energy of the book will remain constant throughout this process. This is an example of the conservation of mechanical energy in action.

The law of the conservation of mechanical energy states that the total mechanical energy of an isolated system remains constant, unless external forces are present. This means that the sum of the kinetic energy and potential energy within the system will remain constant over time, unless the system is subjected to external forces such as friction or gravity. This law is based on the principle that energy cannot be created or destroyed, but rather it can only be transferred or transformed. Therefore, any changes in the mechanical energy of a system must be due to the transfer or transformation of energy from one form to another, rather than the creation or destruction of energy itself.

Answer:

Answer in Observational evidence (b)

The evidence needed to formulate a hypothesis is observational evidence. From keen observations, we are formulating a scientific hypothesis.

Hypothesis is a plausible scientific statement which predicts a process or result of an experiment based on observations. Hypothesis can be made from well established scientific records also.

Some are formulating hypothesis based on some intuitions, while some others are formulated based on inductions or  deductions. An experiment starts from a clear cut hypothesis.

A hypothesis must be testable, falsifiable. A scientific hypothesis must be based on a strict observation and for a considerable time and the observations must support for the statement derived for the solution.

Hence, the evidence is needed for a or a hypothesis to be supported or not supported is observational evidence.

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Answer:

Hope this will help you.

The Thrust on the rocket is 1.434 MN.

To calculate the thrust of a rocket, we use the formula below

Thrust: This is the force that moves an aircraft through the air.

⇒Formula

⇒ Where:

From the question,

⇒ Given:

⇒ Substitute these values into equation 1

Hence, the Thrust on the rocket is 1.434 MN.

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Answer:

hola

Explanation:

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Answer:

8

Explanation:

V = voltage

I = current

R = resistance

V = IR is the equation to find out the Voltage of an item so if we move around the equation so we are trying to resistance it would become R = V/I. So....

V = IR

R = V/I

R = 24/3

R = 8

When a stone is tied to a 0.50 m string and whirled at a constant speed of 4.0 m/s in a vertical circle, the acceleration at the bottom of the circle is 32.0 m/s²

The acceleration at the bottom of the circle can be determined using the formula:
acceleration = (velocity²) / radius

Given that the stone is whirled at a constant speed of 4.0 m/s and is tied to a 0.50 m string, we can calculate the acceleration.

First, let's convert the speed from m/s to m²/s² by squaring it: (4.0 m/s)² = 16.0 m²/s².

Next, substitute the value of velocity^2 (16.0 m²/s²) and the radius (0.50 m) into the formula:

acceleration = (16.0 m²/s²) / (0.50 m) = 32.0 m/s².

Therefore, the acceleration at the bottom of the circle is 32.0 m/s².

In conclusion, when a stone is tied to a 0.50 m string and whirled at a constant speed of 4.0 m/s in a vertical circle, the acceleration at the bottom of the circle is 32.0 m/s².

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(a) The magnitude of the average force acting on the car to bring it to rest is 120,000 N.

(b) The horizontal (vx) and vertical (vy) components of this velocity is 9.66 m/s and 2.59 m/s respectively.

The magnitude of the force acting on the car is calculated as follows;

F = mv / t

where;

F = ( 1200 kg x 10 m/s ) / ( 0.1 s )

F = 120,000 N

The horizontal and vertical component of the velocity of the car is calculated as follows;

Vx = V cosθ

Vy = V sinθ

where;

Vx = 10 m/s  x  cos (15) = 9.66 m/s

Vy = 10 m/s x sin (15) = 2.59 m/s

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The girl encounters a 9100 N average force to the west.

The interaction between two things or between an object and its surroundings is characterized by force, a physical quantity. It can be explained simply as the push or pull that one item applies to another.

An object's mass (m) multiplied by its velocity (v) will give it momentum (p):

p = mv

The girl's initial momentum is:

To the East, p1 = (35 kg)(4.5 m/s) = 157.5 kg*m/s

The girl strikes the tree and rebounded with a speed of 3.3 m/s to the west. Her final momentum (p2) can be found as follows:

To the West, p2 = (35 kg)(-3.3 m/s) = -115.5 kg*m/s

Thus, the girl's change in momentum (∆p) is: ∆p = p2 - p1 = -115.5 kgm/s - 157.5 kgm/s = -273 kg*m/s to the West.

We are aware that the time spent interacting with the tree was 0.03 seconds. Hence, using the impulse-momentum theorem, the girl's average force (F) can be calculated as follows:

F = Δp / Δt

F = (-273 kg*m/s) / (0.03 s) = -9100 N to the West

The force is acting in the opposite direction to the girl's starting velocity, which is to the east, as indicated by the force's negative sign. As a result, the girl encounters a 9100 N average force to the west.

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By adopting anticlockwise as the positive angular direction, the final position vector, r, has a direction that is measured from the north. North West is the direction. It follows the right hand's thumb rule.

A vector is a physical quantity that has both magnitude and angular direction. It is frequently represented by an arrow that points in the same general direction as the amount and has a length appropriate to the size of the quantity. The direction of the position vector always points away from the vector's origin, in the general case. The position vector that is directed from O to P can be expressed as OP if P (x 1, y 1) is another point in the cartesian coordinate system and O is the origin.

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Answer:

Answer: hydraulic press and hydraulic brakes. ... This law is useful in designing instruments like Bramah press ,Hydraulic press , Hydraulic jack etc. It is the principle in the development of hydraulic brakes , that are used in automobiles. It is also known as law of transmission of fluid pressure

Answer:

The answer is B. Circulatory

Explanation:

mass of earth (m1)=5.97×10^24

mass of moon (m2)=7.35×10^22

distance between their center (d)= 3.84×10^8

G=6.67×10^-11

now,

gravitational force =(F)= G(m1×m2)/d²

The amount of heat released outside is 3.5 kJ and the coefficient of performance is 2.

The efficiency of the a machine or any device is the measure of effectiveness of the device. Efficiency describes how a machine converts input energy to output energy without wasting much of the input energy.

Mathematically, efficiency of a machine is given as;

E = output energy / input energy  x 100%

The coefficient of performance  (COP) of a heat pump, refrigerator or air conditioning system is a ratio of useful heating or cooling provided to work required.

The energy released outside = 3.5 kJ

COP = 3.5 kJ / 1.75 kJ

COP = 2

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Answer:

you have the ans bro

v=2*pi*r/T

plug in the value s

Answer:

\(v_c_a_n_o_e=-1.6m/s^{2}\)

Explanation:

You can use the equation of the conservation of momentum. We find that the velocity of the canoe is -1.6m/s².

\(m_1v_1+m_2v_2=0\\(49)(1.5)+(46)(v_c_a_n_o_e)=0\\73.5 + 46v_c_a_n_o_e=0\\46v_c_a_n_o_e = -73.5\\v_c_a_n_o_e = -73.5/46 = -1.6m/s^{2} \\\)

False, the shadow produced by an object held close to a piece of paper in sunlight will be sharp.

The shadow produced by an object held close to a piece of paper in sunlight will be sharp. This is because the closer the object is to the paper, the sharper the shadow will appear. If the object is far away from the paper, the shadow will be fuzzy.

This is due to the fact that the edges of the shadow are less defined the further away the object is from the paper.

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Answer:

-has many of the same properties as potassium.

Explanation:

Answer:

Average speed = 25m/s

Acceleration = 12.5m/s^2

Explanation

Let the distance covered by Riley be 50m

Average speed = Distance/Time

Average speed = 50/2

Average speed = 25m/s

Acceleration = Speed/time

Acceleration = 25/2

Acceleration = 12.5m/s^2

Note that the value of the distance was assumed

Answer:

1-state what the lab is about, that is, what scientific concept (theory, principle, procedure, etc.) you are supposed to be learning about by doing the lab. You should do this briefly, in a sentence or two. If you are having trouble writing the opening sentence of the report, you can try something like: "This laboratory experiment focuses on X…"; "This lab is designed to help students learn about, observe, or investigate, X…." Or begin with a definition of the scientific concept: "X is a theory that…."

2-give the necessary background for the scientific concept by telling what you know about it (the main references you can use are the lab manual, the textbook, lecture notes, and other sources recommended by the lab manual or lab instructor; in more advanced labs you may also be expected to cite the findings of previous scientific studies related to the lab). In relatively simple labs you can do this in a paragraph following the initial statement of the learning context. But in more complex labs, the background may require more paragraphs.

Explanation:

Answer:

Step-up transformers are used at power stations to produce the very high voltages needed to transmit electricity through the National Grid power lines. These high voltages are too dangerous to use in the home, so step-down transformers are used locally to reduce the voltage to safe levels.

The life expectancy of the given stars are:a) 0.2-solar mass, 0.01-solar luminosity red dwarf: 10 trillion yearsb) 3-solar mass, 30-solar luminosity star: 10 million yearsc) 10-solar mass, 1000-solar luminosity star: 10 million years.

The life expectancy of a star is determined by its mass and luminosity. The more massive and luminous the star is, the shorter its life expectancy is. Hence, using this information, we can estimate the life expectancy of the following stars:a) 0.2-solar mass, 0.01-solar luminosity red dwarfRed dwarfs are known to have the longest life expectancies among all types of stars. They can live for trillions of years.

Hence, a 0.2-solar mass, 0.01-solar luminosity red dwarf is expected to have a much longer life expectancy than the Sun. It could live for up to 10 trillion years or more.b) 3-solar mass, 30-solar luminosity starA 3-solar mass, 30-solar luminosity star is much more massive and luminous than the Sun. As a result, it will have a much shorter life expectancy than the Sun.

Based on its mass and luminosity, it is estimated to have a lifetime of around 10 million years.c) 10-solar mass, 1000-solar luminosity starA 10-solar mass, 1000-solar luminosity star is extremely massive and luminous. It will burn through its fuel much faster than the Sun, resulting in a much shorter life expectancy. Based on its mass and luminosity, it is estimated to have a lifetime of only around 10 million years as well.

Therefore, the life expectancy of the given stars are:a) 0.2-solar mass, 0.01-solar luminosity red dwarf: 10 trillion yearsb) 3-solar mass, 30-solar luminosity star: 10 million yearsc) 10-solar mass, 1000-solar luminosity star: 10 million years.

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The horizontal velocity of the shadow is -0.33 m/s

The given parameters;

The horizontal velocity of the shadow is relative to the horizontal velocity of the fly.

The horizontal velocity of the shadow is calculated as follows;

Vₓ = V₀Cosθ

Vₓ = (0.36)Cos(204)

Vₓ = (0.36)(-0.9135)

Vₓ = -0.33 m/s

Thus, the horizontal velocity of the shadow is -0.33 m/s

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