Which mechanical waves needs a medium to travel through?

What is the deceleration (negative acceleration) of a 2200 kg truck if a force of 4000N is used to stop it?

At which position would a person on earth see the entire lighted half of the moon?

What is the spring constant of a pendulum?

When you drop a pebble from height h, it reaches the ground with kinetic energy k if there is no air resistance. from what height should you drop it so it will reach the ground with twice as much kinetic energy?

If a box has a mass of 300 kg, what is its weight on Earth?

A star with the same mass of the sun has a newly discovered planet whose semi-major axis of 2.48 au and an eccentricity of 0.08. what is the aphelion distance of the new planet

What does a hurricane hunter do

Why is fluorine special in terms of electronegativity?

The airbag inflates and deflates quickly so

Two conducting spheres are each given a charge Q. The radius of the larger sphere is three times greater than that of the smaller sphere.