A clear echo is heard within 0.2 seconds when a person shouts by sitting at the ridge of a hill. Calculate the velocity of sound in air. The distance between the person and the hill is 33.2 m

If the frequency of a sound wave is 250 hertz and it's wavelength is 1.36 m, what is the waves velocity? A) 250 m/s B) 340 m/s C) 200 m/s D) 120 m/s

A car accelerates from 13-m/s to 24.1-m/s in 5.4-s. what was its acceleration in m/s2?

If a ball is thrown upward with an initial velocity of 30.0 m/s how much time does it take to reach its maximum height

A farmer is using a rope and pulley to lift a bucket of water from the bottom of a well. the farmer uses a force f1=57.5 n to pull the bucket of water upwards. the total mass of the bucket of water is f2 = 3.9kg.

What is a gravitational force ... ?

A light beam in air strikes the surface of water at an angle of 26° with the normal. When it enters the water it bends toward the normal, making an angle of 19° with it. The velocity of light in air is approximately 300,000 km/s.

Which best explains the relationship between the speed of sound and the medium through which it passes?

g The magnetic force on a charged particle A. depends on the sign of the charge on the particle. B. depends on the velocity of the particle. C. depends on the magnetic field at the particle's instantaneous position. D.

How fast must a 1000 kg car be moving to have a kinetic energy of 1.0 kWh

Which of the following is used to measure weight? Newtons Liters Kilograms Meters