Because so little can be found of the first rocks to form on Earth, the best evidence for the early formation of our planet
comes from studying which of the following?

A Asteroids, lunar rocks, and other objects in our solar
system
B Weathering and erosion patterns in extreme
environments

C The formation of gaseous elements through fusion in
our sun

D Fluctuations in chemical compositions of successive
lava flows

How do you tell if someone actually cares about you? and just say they do?

Ethanol has a heat of vaporization of 38.56 kj/mol and a normal boiling point of 78.4 c. what is the vapor pressure of ethanol at 14 c?

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)