Thomas needs to move an 80 kg rock, but cannot lift it. He decides to use a
lever to move it and applies 200N of force to the rock. What is the MA of
the lever? (you may use 'io for the value of gravity when solving for this
problem...don't forget resistance force is equal to weight or mass times
gravity) *

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.