How many grams of ice at -14°C are needed to cool 200 g of water from 25°C to 10°C. (Take specific heat of ice =0.5 cal g^-1 °C^-1 and latent heat of ice = 80 cal g^-1)

Most energy in an ecosystem comes originally from_

2kg of refrigerant 134a undergoes a polytropic process in a piston-cylinder assembly from an initial state of saturated vapor at 2 bar to a final state of 12 bar, 80 degree c. a)determine the work for the process in kj. b)sketch the process on a p-v diagram.

The charge on a charged sphere is: a)concentrated at its centerb)distributed uniformly throughout its volumec)clustered on its centerd)distributed uniformly over its surface