Which objects play the roles of the sun earth and moon

Does the uphill or downhill direction matter to the speed of the marble, or is the height the only contributing variable? A. Uphill is fastest B. Downhill is fastest C. Height is the only contributing variable. D. None of these factors affect speed.

A bullet of 10g strikes a sand bag at a speed of 100 m/s and gets embedded after travelling 5 cm inside the bag. Calculate the resistive force exerted by the sand on the bullet and the time taken by the bullet to come to rest. with calculation

Winds are named based on different factors how are winds usually named

The current in a radio measures 12 amps. The resistance of the radio is 4 ohms. What is the voltage? Question 1 options: 3 V 48 V 3 A 48 ohms

A light ray travelling from diamond into air has an angle of refraction of 56°. A piece of glass is then placed right next to the diamond. (a) How will the angle of refraction change?

Light waves that cross from an air medium to a water medium will A. O be focused into a straight line. B. O lose energy and dissipate. C. O change length and direction. D. O reflect off the water's surface.

What is a possible cost of using nonrenewable energy resources? A. Costs more money B. Less water pollution C. Sustainable energy D. Greenhouse gases

Kara is writing a science-fiction story. In the story, Earth no longer experiences day and night. To return Earth to normal, which action should the heroine of the story take? A. She should get the Sun to travel around Earth again. B.

What is the kinetic energy of a 55-kilogram skier traveling at 9.0 meters per second

A force is applied to a 2.8 kg mass and produces 3.9 m/s 2 acceleration. what acceleration would be produced by the same force applied to a 8.2 kg mass? answer in units of m/s 2.