What happens to the strength of an electromagnet when the voltage in the coils of the solenoid is increased?
A It remains the same
B. It decreases
C. It depends on what metal makes up the solenoid
D. It increases

What is the order of the moon, earth, and sun in a lunar eclipse and a solar eclipse?

A100 kg running back runs at 5m/s into a stationary linebacker. it takes 0.5 for the running back to be completely stopped

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.