Answer:
There is much more friction on the rough surface than there is on the smooth surface.
Explanation:
The velocity of sound in at 300C is 511.3 m/s.
Explanation:
The equation that gives the speed of sound in ar as a function of the air temperature is the following:

where
T is the temperature of the air, measured in Celsius degrees
In this problem, we want to find the speed of sound in ar for a temperature of

Substituting into the equation, we find:

So, the velocity of sound in at 300C is 511.3 m/s.
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A child height can be very tall or short
A because it's the smaller the thicker you just can't have 0 gage