Answer:
A This is a nuclear reaction, because the atoms nucleus changed.
Answer:
If instrument used has louder pitch and due to the fact that pitch depends on frequency we expect that the wave pattern on the graph would it's crest or trough contract more to represent higher frequency
Answer:Sometime decreases and sometime increases.
Explanation:
Given
Projectile is launched at 
so horizontal velocity=ucos35
vertical velocity=usin35
since gravity acts in the vertical direction, therefore, it affects only the vertical component of the projectile.
So Vertical velocity first decrease up to maximum height and then starts to increase.
Answer:

Explanation:
As we know that the angle made with the vertical is given so we have

so we have

now differentiate both sides with time


now we know that



now we have


Answer:
An object in motion will stay in motion at the same speed and in the same direction (ie with constant velocity) unless a force makes it change.
Explanation: