Why do objects in orbit appear to be weightless?

An incident ray of light strikes a diamond at an angle of 45?. The index of refraction of air is 1.0003 and the index of refraction of a diamond is 2.42. What is the angle of refraction rounded to the nearest whole number? 2? 17? 19? 45?

Commander Shepard, an N7 spectre for Earth, weighs 799 N on the Earth's surface. When she lands on Noveria, a distant planet in our galaxy, she weighs 356 N. What is the acceleration of gravity on Noveria in m/s2? Round to one decimal place.

Both high-side pressures and low-side pressures are low with the engine running and the selector set to the air-conditioning position. Technician A says that the system is undercharged. Technician B says the cooling fan could be inoperative.

In a given circuit, the supplied voltage is 1.5 volts, and the resistor value is 3 ohms. Use Ohm's law to determine the current in the circuit. 2.0 amps 0.5 amps 4.5 amps 1.5 amps

A 3.00 kg particle has a velocity of (3.02 - 4.10 m/s.

A climber using bottled oxygen accidentally drops the oxygen bottle from an altitude of 4500 m. If the bottle fell straight down this entire distance, what is the velocity of the 3-kg bottle just prior to impact at sea level? A. 300 m/s. B. 150 m/s.

The Doppler effect is the change in of a wave due to the motion of the source and/or receiver.

In a sentence, how is speed and motion related?

5. What would increase the force of gravitational attraction the most? (HINT-Look at formula)

How does flowing water change the earths surface