<span>It takes heat to make something evaporate, so it takes heat from your arm. Alcohol easily evaporates at room temperature, so it feels cool. This is also why you feel cool when getting out of the pool. The water on your skin evaporates.
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The height of the building where a penny falls and hits the ground going 30 m/s is 45.9 m.
The height of the building can be calculated with the following equation:
Where:
: is the final speed = 30 m/s
: is the initial velocity = 0 (it falls from rest)
g: is the acceleration due to gravity = 9.81 m/s²
h: is the height =?
Hence, the <u>height </u>is:
Therefore, the height of the building is 45.9 m.
Find more about freefall here:
I hope it helps you!
Answer:
The zero field location has to be on the line running between the two point charges because that's the only place where the field vectors could point in exactly opposite directions. It can't be between the two opposite charges because there the field vectors from both charges point toward the negative charge.
Change in volume = mass x coefficient of linear expansion x change in temperature
.002 x .0001802 x 30 = .000010812
initial volume + change in volume = Final volume
.002 + .000010812 = .002010812 m cubed