How tall is a chair? Choose the best estimate.

A.

1 mm

B.

1 cm

C.

1 m

D.

10 m

A ray of light traveling in air strikes the surface of a liquid. if the angle of incidence is 31.7◦ and the angle of refraction is 21.3◦, find the critical angle for light traveling from the liquid back into the air. answer in units of ◦.

What is a good example of netwon 3rd law

It is possible that the universe may A. further break itself apart, creating new structures in space. B. explode within the next million years. C. continue to expand forever. D. dissipate from lack of sufficient matter.

What is responsible for forming chemical bonds with other atoms?

What is an example of a chemical change that occurs as part of the rock cycle A) lava cools and condenses on the Earths surface B) sedimentary rocks are worn away by water erosion C) igneous rocks are cracked and broken into smaller pieces by

Which of the following is a vector quantity? A. 83 ounces of liquid B. 55 km/hr in a truck C. 15 seconds of travel D. 10 m/s down

Which of the following best describes the ultraviolet catastrophe of blackbody radiation? A. As energy is added to an object acting as a blackbody radiator, its emissions move to the ultraviolet part of the electromagnetic spectrum. B.

Is an engine-activated booster unit that reduces the effort required to apply the hydraulic brakes

A box is lowered using a rope. If the acceleration of the box, is 2.5 m/s2 (downward) and the tension in the rope is 31 N, what is the mass of the box (in kg) ?

On a very hot summer day, the rooms on the first floor of a house stay cooler than the rooms on the second. Which form of thermal energy flow causes this to occur? A) Conduction B) Convection C) Kinetic D) Radiation