What is the prerequisite for gravity to act?

How far (in meters) above the earth's surface will the acceleration of gravity be 85.0 % of what it is on the surface?

How far can light travel in one year?

Telescopes work by using optics which means light true or false I don't know what category to put this in so forgive me if it's not the right one

Is magnetic force a matter? I will mark the one who gives the best explination brainliest.

As the temperature of a liquid increases, the solubility of a solid in the liquid A. increases. B. decreases. C. stays the same. D. either increases or decreases, depending upon the liquid.

Two very small spheres are initially neutral and separated by a distance of 0.30 m. Suppose that 2.50 1013 electrons are removed from one sphere and placed on the other. (a) What is the magnitude of the electrostatic force that acts on each sphere?

Why is it important to balance a chemical equation? A. It is not important to balance a chemical equal B. To make sure you have the correct products C. To make sure you have the correct reactants D. To obey the law of conservation of mass

The presence of icicles hanging off the eaves of a wood-framed structure is most likely due to: heavy snow followed by a thaw. improper insulation in wall cavities. use of a poor-quality roof sheathing material. lack of proper roof ventilation.

Both gravitational potential energy and kinetic energy depend on

How much work is done when a 105 g tomato is lifted 19.2 m?