The engine of a racecar approaching at 40.0 m/s emits a frequency of 160 Hz. What frequency does a stationary spectator hear as the car approaches? b)
What is the frequency as it moves away?

Acaterpillar tries to climb straight up a wall a meter high, but for every 2 cm up it climbs, it slides down 1 cm. eventually, it reaches the top. when it reaches the top, it does not pull itself over so it will slide down 1 cm. what is the total displacement traveled?

Specific heat refers to the amount of heat required to change 1 gram of a substance by degree(s) celsius

If state law mandates that elevators cannot accelerate more than 2.40 m/s2 or travel faster than 14.8 m/s , what is the minimum time in which an elevator can travel the 373 m from the ground floor to the observatory floor? ?