How tall is a chair? Choose the best estimate.

A.

1 mm

B.

1 cm

C.

1 m

D.

10 m

Boss tweed encourages his associates to work "like a well-oiled machine", thus providing his workers with A. an analogy B. a heuristic C. an algorithm D. functional fixedness (not correct)

1. Which of these is necessary for a reasonable order-of-magnitude estimate of the speed of a falling object? a. Round all numbers to the nearest whole number. b. Have a correct and exact value for the distance of the fall. c.

Which of the following reactions release more energy? fusion reactions nuclear chain reactions fission reactions chemical reactions

when a boy plays a penalty kick he applies a force of 30N for a period of 0.05s. If the mass of the ball is 0.075KG, calculate the speed with which the ball move

A gas is contained in a vertical, frictionless piston-cylinder device. The piston has a mass of mpiston = 2 kg and a cross-sectional area of Apiston = 30 cm2. A spring above the piston is compressed by s = 2.

A certain rain cloud at an altitude of 1.80 km contains 3.20 107 kg of water vapor. How long would it take for a 2.90-kW pump to raise the amount of water from Earth's surface to the cloud's position?

The law of conservation of energy states that A) energy may be created, destroyed or transformed. B) energy may be created, but only in certain types of nuclear reactions. C) energy may neither be created nor destroyed; it may only be transformed.

Pushing a rock from a hill top is called

What is a pulsar? a. the remains of a low-mass star after it explodes b. a spinning neutron star emitted radio waves c. another name for a protostar d. the stage before a dying star becomes a supernova

Can we divide two vectors?