The Moon's center is 3.9×10^8 m from Earth's center The Moon is 1.5×10^8 km from the Sun's center. If the mass of the Moon is 7.3×10^22 kg, find the ratio of the gravitational forces exerted by Earh and the Sun on the Moon.
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The velocity of a curling stone is due east. what will be the direction of the momentum of the curling stone as it moves?

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?

This is the substance(s) formed in a chemical reaction.