An ambulance siren sounds different as it approaches you than when when it moves away from you. what scientific term would you use to explain how this happens

A ball of mass 0.152 kg is dropped from a height 2.27 m above the ground. The acceleration of gravity is 9.8 m/s 2. Neglecting air resistance, determine the speed of the ball when it is at a height 0.903 m above the ground. Answer in units of m/s.

The temperature of the a body increase as the velocity of the body's molecules?

8. A car travels at a constant velocity of 70 mph for one hour. By the end of the second hour, the car's velocity was 60 mph. At the end of the third hour, the car's velocity was 80 mph.

A car travels at 30 miles/hr. If the car drives for 12 hours, how far will it travel?

Since all objects are weightless in orbit, how is it possible for an orbiting astronaut to tell if one object has more mass than another?

A little girl is going on the merry-go-round for the first time, and wants her 50kg mother to stand near to her on the ride 2.1m from the merry-go-rounds center. If her mother's speed is 3.

At time t=0 a 2150 kg rocket in outer space fires an engine that exerts an increasing force on it in the + x-direction. This force obeys the equation Fx=At2, where t is time, and has a magnitude of 893.68 N when t=1.25 s.

Jenny is driving across the country. At times, there is no signal to her mobile telephone or pager. What might be the reason for this?

With your bare feet, stand with one foot on a rug, and the other foot on a tile, linoleum, or wood floor. Which one feels colder? Which one is really colder? Explain what is going on in a paragraph.

A firewoman dropped a person onto the safety net. Right before the person hit the net he had a velocity of 11.2 m/s and 1800 J of kinetic energy. What was the mass of the person?