How do we see an object that isn't luminous?

Does the temperature in the exosphere go from hot to cold or cold to hot?

Why are there temperature differences on the moon's surface even though there is no atmosphere present?

Which planet has an axis of rotation parallel with the plane of its orbit? a. Jupiter b. Saturn c. Neptune d. Uranus

Under what circumstances does distance traveled equal magnitude of displacement? what is the only case in which magnitude of displacement and displacement are exactly the same?

You hear the engine roaring on a race car at the starting line. Predict the changes in sound as the race starts and approaches the camera A. the sound of the engine will get louder and pitch lower B.

How would you describe the two projectors used to screen a three-dimensional movie? A. Both projectors have vertical polarizers. B. One projector has a vertical polarizer and the other has a horizontal polarizer. C.

A roller coaster has a mass of 500 kg. It drops from rest at the top of a hill that's 57 m tall. How fast is it going when it reaches the bottom? Acceleration due to gravity is g = 9.8 m/s2.

Two sinusoidal waves are moving through a medium in the positive x-direction, both having amplitudes of 7.00 cm, a wave number of k=3.00m-1, an angular frequency of ω=2.50s-1, and a period of 6.00 s, but one has a phase shift of an angle ϕ=π12rad.

For a vacation, you and your family fly east to west from Boston, Massachusetts, to Seattle, Washington. You notice that your flight back home to Boston is shorter than your flight to Seattle. Which phenomenon causes your flight home to be shorter?

You spy on an anchor on the bottom of a lake. What is the direction and amount of force the water exerts on it: a) zero b) up, equal to the weight of the anchor. c) up, less than the weight of the anchor d) down, equal to the weight of the anchor.