In a dark room you see objects when you shine a flashlight because

A. the objects you see are refracted.

B. the objects you see are blackened.

C. the objects you see are illuminated

Consider the following statements. A. Heat flows from an object at higher temperature to an object at lower temperature; B. Heat flows from an object with higher thermal energy to one with lower thermal energy; C.

A. 5 kg air puck moves to the right at 3 m/s, colliding with a 1.5kg air puck that is moving to the left at 1.5 m/s. 1. Determine the direction and speed of the pucks' motion if they stick to each other after the collision. 2.

The wavelength of a wave in some medium is reduced, what happens to the period? The velocity? The amplitude? The frequency?

What is the acceleration of a sprinter if he increases his speed from 0 m/s in 0.5 seconds

Regions in the milky way where density waves have caused gas clouds to crash into each other are called

Which statement describes how light behaves when it strikes a translucent material? A. Light is scattered. B. Light is transmitted. C. Light is reflected. D. Light is absorbed.

A certain gas is present in a 15.0 l cylinder at 2.0 atm pressure. if the pressure is increased to 4.0 atm the volume of the gas decreases to 7.5 l.

Choose all the answers that apply. To qualify as a planet, a celestial object must: have an irregular shape revolve around the sun orbit in a clear area have enough gravity to have a spherical shape have a satellite

Oxygen makes up the largest part of living cells at 65%. What is the percentage of the second-most abundant element in living cells?

Acceleration is defined as the rate of change for which of the following? A. time B. velocity C. position D. displacement