If the temperature does not change but the mass of the object increases the thermal energy in the object decreases

c)as speed changes, wavelength and frequency change.

everything changes!

1= 26.17

2= 1.17

3=30.86

4=5.86

just took the assigment on edge

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be

a electromagnetic waves