Which equations are balanced? check all that apply.

mg3n2 + h2o → 3mgo + 2nh3

c3h8 + 5o2 → 4h2o + 3co2

zn + 2hcl → zncl2 + h2

3ca(oh)2 + 2h3po4 → ca3(po4)2 + 6h2o

3h2so4 + 2fe → fe2(so4)3 + h2

4al + 3o2 → 2al2o3

Acar accelerates from 5.0 m/s to to 11 m/s at a rate of 3.0 m/s^2. how far does it travel while accelerating? 20m 117m 43m 16m

Identify the forces that contribute to the centripetal force on the object in each of the following examples: a. a bicyclist moving around a flat, circular track b. a bicycle moving around a flat, circular track c. a racecar turning a corner on a steeply banked curve

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)