4 years ago

What happens to a falling object when the force of air resistance equals the force of gravity?

1 answer:

4 0

When the two forces of gravity and air resistance become the same, the object no longer speeds up, and it doesn't slow down either. This is called terminal velocity
So the answer is b

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A slab of a thermal insulator is 100 cm2 in cross section and 2 cm thick. Its thermal conductivity is 0.1 J/s.m.ºC. If the tempe

bekas [8.4K]

-5 W is the heat flows through the slab in one day

Explanation:

The heat transferred is directly proportional to the area of the material and the temperature differences in the body, whereas the heat transfer is inversely proportional to the length of the material
The equation can be written as $Q=-k \frac{ A T}{l}$ where Q is the heat transfer, k is the thermal conductivity of the material, A is the area of the material and T is the difference in the temperature and the l is the length of the material.
Given that, A= 100 $cm^{2}$ , l= 2 cm, k = 0.1 J/S. m. c and T= 100 degree Celsius
Substitute these values in the equation, you will get Q= -5 W