HELP ME PLSS A tennis ball is thrown vertically upward
with an initial velocity of +7.5 m/s.
What will the ball's velocity be when it
returns to its starting point? The acceleration
of gravity is 9.81 m/s?.
Answer in units of m/s.
2
part 2 of 2
How long will the ball take to reach its
starting point?
Answer in units of s.

Asmall electric heater, immersed in 80g of water in a calorimeter of 40j/k raises the temperature from 10.5 degree celsius to 25 degree celsius in 12 minutes. using the same apparatus with 50g of oil instead of water, it is found that the temperature of oil rises from 7 degree celsius to 27 degree celsius in 10 minutes. find specific heat capacity of the oil.