Answer:
d = 1600 m
Explanation:
If car start from rest and accelerates uniformly then the displacement of the car is given as

now we know

now if the same car will accelerate from rest for four times of the previous time interval
then we will have


so the distance will be 16 times more

400 N
The weight of the man is evenly distributed on each scale
Answer:
A rise in temperature increases the kinetic energy and speed of particles; it does not weaken the forces between them. The particles in solids vibrate about fixed positions; even at very low temperatures. Individual particles in liquids and gases have no fixed positions and move chaotically.
Explanation:
As we know that speed of sound is

frequency of sound is

now we know that frequency of sound and speed of sound is related to each other by the following formula




<em>so wavelength of sound is 25 cm or 0.25 m</em>