Explain how you could separe a mixture of sand and salt

The rocket-driven sled Sonic Wind No. 2, used for investigating the physiological effects of large accelerations, runs on a straight, level track 1070 m (3500 ft) long. Starting from rest, it can reach a speed of 224 m/s (500 mi/h) in 0.900 s.

What is the mass of a basketball that is shot with 12N of force at an acceleration of 4m/s2?

A spring has a spring constant of 20N/m. What force does the spring exert on you if the spring is compressed - 0.25 m?

An oscillator consists of a block of mass 0.500 kg connected to a spring. When set into oscillation with amplitude 35.0 cm, the oscillator repeats its motion every 0.500 s.

An electromagnetic wave in a vacuum has a wavelength of 0.032 m. What is its frequency?

Name one process that requires a force in the human body.

Which describes the electric forces inside an atom

Why can radio telescopes be used 24 hours a day?

How do you find mass, volume and density? Any formulas?

Explain the difference between texture and composition.