A car moves from rest condition moves with acceleration 4 ms^-2.After 5s, calculate velocity of the car and the distance traveled by the car. SOMEONE HELLPP

An ideal otto cycle has a compression ratio of 10.5, takes in air at 90 kpa and 40°c, and is repeated 2500 times per minute. using constant specific heats at room temperature, determine the thermal efficiency of this cycle and the rate of heat input if the cycle is to produce 90 kw of power.

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration

What are the north and south poles of a solenoid change with?