Why do we need to separate out certain things from a mixture

A 2.30 kg granite stone is tied to a rope and spun in a circular path of radius 1.18 m. The stone attains a maximum speed of 12.0 m/s. What is the magnitude of the maximum radial acceleration (in m/s2) of the stone

A bar magnet is dropped toward a conducting ring lying on the floor. As the magnet falls toward the ring, does it move as a freely falling object

Tracy stands on a skateboard and tosses her backpack to her friend who is standing in front of her. Which best describes the acceleration Tracy experiences? It is less than the acceleration of the backpack because she has a greater mass.

In your own words, explain red shift and blue shift. Use at least two complete sentences to write your answer.

If water vapor with the mass of 35.0 grams is cooled and condensed into water in a closed system such as a closed glass jar, what is the mass of the water after the water vapor completely condenses?

Which statement best describes longitudinal waves? A) Particles of the wave medium move perpendicular to the direction of propagation of the wave. B) Longitudinal waves do not require a material medium for propagation.

Three-fourths of the Earth's surface is covered by water. The water cycle includes these water sources evaporating and returning to Earth as rain and snow.

An object with a mass of 10.9 kg experiences a force of 18.53 N. What is the acceleration of the object? A. 2.2 m/s2 B. 1.7 m/s2 C. 16.83 m/s2 D. 1.3 m/s2

Where do deep currents flow?

If a car drove 121km/hr on average how far did it travel in 116min?