Brass is an alloy made from copper and zinc. a 0.68 kg brass sample at 96.9◦c is dropped into 2.01 kg of water at 4.8◦c.
if the equilibrium temperature is 7.3◦c, what is the specific heat capacity of brass? the specific heat of water is 4186 j/kg ·◦ c .
answer in units of j/kg ·◦ c.

Zeros that follow non-zeros numbers and are also to the right of a decimal point are significant

Steam is generated in a boiler of a cogeneration plant at 10 mpa and 450°c at a steady rate of 5 kg/s. in normal operation, steam expands in a turbine to a pressure of 0.5 mpa and is then routed to the process heater, where it supplies the process heat. steam leaves the process heater as a saturated liquid and is pumped to the boiler pressure. in this mode, no steam passes through a condenser, which operates at 20 kpa. (a) determine the power produced in the turbine and the rate at which process heat is supplied in this mode. (b) determine the power produced in the turbine and the rate of process heat supplied if only 60 percent of the steam is routed to the process heater and the remainder is expanded to the condenser pressure. (3.32 mw; 9.69 mw; 4.25 mw; 5.82 mw)

Because atoms of elements in the same group of thbecause atoms of elements in the same group of the periodic table have the same number of neutrons, they have similar properties. select the best answer from the choices provided t fe periodic table have the same number of neutrons, they have similar properties. select the best answer from the choices provided t f