g Vector has a magnitude of 10.9 units and points due west. Vector points due north. (a) What is the magnitude of if + has a magnitude of 15.7 units? (b) What is the direction of + relative to due west? (c) what is the magnitude of if - has a magnitude of 15.7 units? (d) What is the direction of - relative to due west?

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.

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)

Petroleum contains energy. a. light b. kinetic c. chemical d. mechanical