Enthalpy is? A. Measured in Kelvin.

B. A measure of a system's disorder.

C. A measure of the kinetic molecular energy of a system.

D. None of these answers explain what enthalpy is.

A100-watt light bulb illuminates a solar cell. the electricity from the solar cell operates a water pump that delivers 1 watt of power. what is the efficiency of the system?

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )

The amount of potential energy possessed by an elevated object is equal to what?