Which of the following would likely be the best reflector of heat energy?

A. A polished pale yellow

surface

B. A dull orange surface

C. A bumpy red surface

D. A gritty navy blue surface

A clock has an hour hand of length 2.4 cm and a minute hand of length 3.8 cm. (a) Calculate the position and velocity of the hour hand at noon. (b) Calculate the position and velocity of the minute hand at 12:15.

Which of the following is an example of a material whose atoms strongly hold on to electrons

Question 7 Review Which particles are not affected by the strong force? A. hadrons B. protons C. neutrons D electrons Submit A Hide Toolbar

A dragster starts with zero velocity and completes a 404.5 m (0.2528 mile) run in 4.922 s. If the car had a constant acceleration, what would be its acceleration and final velocity?

Juan is comparing the brightness of two lightbulbs. Which SI unit should he use? a. Kelvin b. candela c. mole d. meter a or b

An ecosystem is all the populations of organisms that live together and A. the microorganisms that depend on them. B. the organisms that generate energy from sunlight. C. the physical factors with which they interact. D.

Which statement about magnetic poles is accurate? A) Same magnetic poles attract, while different magnetic poles repel. B) Same magnetic poles attract, while different magnetic poles attract.

Power is measured in: A) J/s B) J2/s C) s/J D) s2/J

The amount or the strength of force is called its

An airplane in flight has a pressure difference between the lower and upper wing surface; this provides an upward force that balances the weight of the plane.