3 years ago

The average 8-18 year old spends how many hours per day average in front of a screen doing little physical activity

Physics

1 answer:

Ne4ueva [31]3 years ago

5 0

Nearly four hours every day, doing little to no physical activity.

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As 390 g of hot milk cools in a mug it transfers 30 000 j of heat to the environment. whats is the temperature change of the mil

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You have to use the specific heat equation.

Q = cmΔT where Q is the energy, c is specific heat, m is mass, and ΔT is change in temp.

So we can substitute our variables into the equation.

30000J = (390g)(3.9J*g/C)ΔT

Solving for ΔT, we get:

30000J/[(390g)*(3.9J*g/C) = ΔT

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I'm assuming the temperature is C, since it was not specified.

Hope this helps!

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C.) <span>The total mass of an object can be assumed to be focused at one point, which is called its center of "Mass"

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3 years ago

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ou are sitting in your car at rest at a traffic light with a bicyclist at rest next to you in the adjoining bicycle lane. As soo

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Till the time car is just adjacent to the bicycle we can say

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