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3 years ago

What is the acceleration of a car that goes from 4m/s to 8m/s in 2s use the guess method

Physics

1 answer:

Dvinal [7]3 years ago

7 0

Answer:

<h2>12m/3s is the answer </h2><h2> I hope its right...</h2>

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Please help me fr fr !

Furkat [3]

The answer is A because it describes both toy cars

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3 years ago

How much force is needed to accelerate a bicycle and rider with a total mass of 80 kg at a rate of 2.0 m/s2?

snow_tiger [21]

If I am not mistaken I think it is C. 320 N

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4 years ago

Read 2 more answers

The intensity of the sound from a certain source is measured at two points along a line from the source. The points are separate

Artemon [7]

Answer:

The source is at a distance of 4.56 m from the first point.

Solution:

As per the question:

Separation distance between the points, d = 11.0 m

Sound level at the first point, L = 66.40 dB

Sound level at the second point, L'= 55.74 dB

Now,

$L = 10log_{10}\frac{I}{I_{o}}$

$I = I_{o}10^{\frac{L}{10}} = I_{o}10^{0.1L} = 10^{- 12}\times 10^{0.1\times 66.40} = 10^{- 5.36}$

$L' = 10log_{10}\frac{I'}{I_{o}}$

$I' = I_{o}10^{\frac{L'}{10}} = 10^{- 12}\times 10^{0.1\times 55.74} = 10^{- 6.426}$

where

$I_{o} = 10^{- 12} W/m^{2}$

I = Intensity of sound

Now,

$I = \frac{P}{4\pi R^{2}}$

Similarly,

$I' = \frac{P}{4\pi (R + 11.0)^{2}}$

Now,

$\frac{I}{I'} = \frac{(R + 11.0)^{2}}{R^{2}}$

$\frac{10^{- 5.36}}{10^{- 6.426}} = \frac{(R + 11.0)^{2}}{R^{2}}$

$R ^{2} + 22R + 121 = 11.64R^{2}}$

$10.64R ^{2} - 22R - 121 = 0$

Solving the above quadratic eqn, we get:

R = 4.56 m

8 0

3 years ago

What distinguishes mass from weight? A. Mass is a measure of the amount of matter in an object, while weight is a measure of the

Studentka2010 [4]

Answer:

A. Mass is a measure of the amount of matter in an object, while weight is a measure of the force of gravity on the object.

Explanation:

Mass is also a scalar quantity associated with the amount of atoms and/or molecules that constitutes the object. While weight is a force due to the action of gravity (either on our planet or any other one) and therefore a vector quantity that we routinely use as scalar due to the fact that it is always pointing down (towards the center of the Earth) so we ignore a bit the direction associated with it.

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3 years ago

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The basic life function of an organism are carried on by

Lana71 [14]

I believe the answer is a: cells.

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3 years ago

What is the acceleration of a car that goes from 4m/s to 8m/s in 2s use the guess method​

What is the acceleration of a car that goes from 4m/s to 8m/s in 2s use the guess method