A man on a skateboard carrying a dictionary is initially at rest. He heaves the dictionary forward with a speed of 0.97 m/s and he recoils backward with a speed of 0.04 m/s. if the dictionary's mass is 3.24kg what is the mass of the man? ( will be reported if you answer just for points )

Identify the arrows that show the correct direction of heat transfer. 66°f 112°f 98°f

Carbon 14 is a naturally occurring stable

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.