Why do the planets move in fixed orbits around the sun?

A 3.50kg box is moving to the right with speed 8.00m/s on a horizontal, frictionless surface. At t = 0 a horizontal force is applied to the box. The force is directed to the left and has magnitude F (t) = (6.

What methods can be used to break down substances into elements

Martin mixed sulfur (a yellow solid) with iron filings (a black solid) in a ceramic dish called a crucible. Then he separated them using a magnet. What kind of a change is this? A. change in state B. mixing and separation C. replacement D. synthesis

At what part of the cardiac conduction system does the electrical impulse travel most rapidly?

A runner increases her speed from 5 km/hr to 10 km/hr over a period of three hours what is her acceleration?

1: Explain how you can use Boyle's Law to determine the new volume of gas when its pressure is increased from 270 kPa to 540 kPa? The original volume of gas was 1 L. Assume the temperature and number of particles are constant.

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If a skater who is spinning pulls her arms in so as to reduce her rotational inertia by half, by how much will her angular momentum change? by how much will her rate of spin change?

What an object is made up of and the color of light that strikes it determine the A) apparent color of object B) transparency of the object C) opacity of the object D) translucence of the object

This chart shows characteristics of three different types of waves.