PLEASE HELPP A 275 g block at 100°C is placed in a 65 g brass calorimeter that contains 140 g of water at 15.0°C. If the final temperature of the mixture is
28.0°C, what is the specific heat of the block?
O 0.340 J/gºC
O 0.385 J/gºC
O 0.401 J/g °C
O 0.016 J/g °C

Which terms describe the purpose of antennas on devices that use radio waves? transmit and receivemodify and amplifyamplify and receivemodify and transmit

Air is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. air enters the heat exchanger at 95 kpa and 20°c at a rate of 0.6 m^3/s. the combustion gases (cp = 1.10 kj/kg°c) enter at 160°c at a rate of 0.95 kg/s and leave at 95°c. determine the rate of heat transfer to the air and its outlet temperature.

Aperson walks first at a constant speed of 4.89 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 2.95 m/s. what is the average speed over the entire trip?