The pressure of water is increased from 100 kpa to 900 kpa by a pump. the temperature of water also increases by 0.15°c. the density of water is 1 kg/l and its specific heat is cp = 4.18 kj/kg⋅°c. the enthalpy change of the water during this process is kj/kg. solve this problem using appropriate software.

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Starting with only the balmer series light (visible light), how could we ensure that the solar panels generate a current that mark can use for his power station? a)by gradually increasing the brightness (amount) of light that we shine on it. b)by gradually increasing the frequency of the light we shine on it. c)by gradually increasing the wavelength of the light that we shine on it.

Suppose a wire with a current is pushed upward by a magnetic field. how would the wire move if the direction of the current reversed? explain your answer.