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Schach [20]
4 years ago
10

If the speed of a motor scooter doubles, which of the following also doubles? 1)kinetic energy 2) acceleration 3) momentum 4) al

l of the above
Physics
1 answer:
emmasim [6.3K]4 years ago
6 0

Answer:

3

Explanation:

-The formula for kinetic energy is the following:

K.E.=\frac{1}{2}mv^{2}

where:

K.E. is kinetic energy

m is mass

v is velocity

Here we can see that kinetic energy is proportional to the velocity squared, so if the speed or velocity of the scooter doubles then this would quadruple its kinetic energy.

-The acceleration is the rate of change of velocity per unit of time. A scooter could double its speed with a constant acceleration, so an increase in speed doesn't necessarily mean an increase in acceleration.

-The formula for momentum is the following:

p=mv

where:

p is momentum

m is the mass of the object

v is the objects velocity

Here we can see that the momentum is directly proportional to the velocity, so if the scooter where to double its velocity then it would also double its momentum.

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The thing that was developed was humans' ability to USE nuclear energy, to do what we want it to do, when we want it to do it.

The reason this was first developed was to bomb the holy beans out of Japan, in order to win World War II.

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7 0
3 years ago
What is the intensity of a sound with a measured intensity level of 84 db? (i0 = 10-12 w/m2)?
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The unit measurement for sound can be expressed in terms of intensity and in decibels. The intensity of sound is the measure of its power over unit area. The common unit of measurement is in decibels. This is commonly used in measuring the extent of noise. The conversion from intensity to the decibel unit is through logarithmic function. The formula is:

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Substituting the values to the equation,

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In scientific notation the intensity is 2.512 x 10^-4 W/m^2.
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