Answer:
a. 9.8 m/s2.
Explanation:
The acceleration depends on the force of gravity. It's independent of the velocity of the ball.
La lumière qui vient des étoiles.
Simply subtract the two velocities and divide by 8.1,

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Answer:
Q=0.16*c kJ
Explanation:
Heat transfer and energy changes is related by the equation
Q=mcΔT
where
Q=heat transfer
m=mass of substance
c=specific heat of the material
ΔT= change in temperature
Given
m= 4 kg
c=c
ΔT=40° C
Q=4*c*40
Q=160c
Q=160/1000*c kJ
Q=0.16*c kJ