1) when surrounding temperature increases, the air molecues in
the closed cylinder gains energy and so moves faster. this
increases their rate of collision with the walls of the cylinder
and so increases pressure.
2) do by this formula refractive index = spd of light in vacuum/spd
of light in diamond. though i assume ur "3 x (10 to the power of
Coolm/s" is 3/10^8m, spd of light in vacuum.
3)1Q) acceleration = change in velo/time = 10/8 = 1.25 m/s^2
Force exerted on car by towing vehicle = frictional force +
(500)(1.25)
= 500 + 625
=1125N
actually not really sure whether to add frictional force...
2Q) constant velo = 0 accel
if a=0, den F = (500)(0)= 0N
so resultant is 0N.
3Q) towing force when the car moving at const velo is the
frictional force, 500N.