How do we calculate wave speed

If a car goes along a straight road heading east and speeds up from 45 ft/s to 60 ft/s in 5s, calculate the acceleration

A 2000 kg car is parked at the top of a 30 m high hill. what is its potential energy

In which part of the eye are eye floaters found? Cornea. Vitreous humor. Retina. Convex lens.

A physicist found that a force of 0.68 N was measured between two charged spheres. The distance between the spheres was 1.0m. Calculate the force between two spheres when the distance between the spheres was decreased by. 50m.

An instrument that can detect the presence of an electric charge is a

What os the term for the smallest bit into which chemical substance can be divided and still have the properties of that substance A : eletron B:molecule c:atom D:ion

How many excess electrons must be present on each sphere if the magnitude of the force of repulsion between them is 4.57*10-21 newtons?

If you could see the electric field coming off a proton you would notice that electric field lines are

We wrap a light, nonstretching cable around a 10.0 kg kg solid cylinder with diameter of 38.0 cm cm. The cylinder rotates with negligible friction about a stationary horizontal axis. We tie the free end of the cable to a 14.

A 0.5kg baseball experiences a 10N force for a duration of 0.1s. What is the change in velocity of the baseball