The diagram below shows the heating of an unknown substance (it is not water). Its melting point is? The diagram below shows the heating of an unknown substance. (It is NOT water). Its melting point is: a. between 35⁰C and 70⁰C

b. 70⁰C

c. between 70⁰C and 140⁰C

d. 140⁰C

Idon’t quite understand this problem

For this car, predict the shape of a graph that shows distance (x) versus time (t). note that time is the independent variable and will be on the bottom axis. need asap

Air enters a gas turbine with two stages of compression and two stages of expansion at 100 kpa and 17°c. this system uses a regenerator as well as reheating and intercooling – the intercooler returns the air to the inlet temperature. the pressure ratio across each compressor is 4 ; 300 kj/kg of heat are added to the air in each combustion chamber; and the regenerator operates perfectly while increasing the temperature of the cold air by 20°c. determine the system’s thermal efficiency. assume isentropic operations for all compressor and the turbine stages and use constant specific heats at room temperature. (0.378)