When a car goes around a circular curve on a horizontal road at constant speed, what force causes it to follow the circular path?

A) the normal force from the road
B) the friction force from the road
C) gravity
D) No force causes the car to do this because the car is traveling at constant speed and therefore has no acceleration.

B

Physics & Space Science

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A mass is attached to a vertical spring and bobs up and down between points A and B. Where is the mass located when its kinetic energy is a minimum?

A) midway between A or B B) at either A or B C) one-fourth of the way between A and B

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Physics & Space Science

Choose the true statement that compares and contrasts the Maxwell-Boltzmann (MB) distribution, the Fermi-Dirac (FD) distribution, and the Bose-Einstein (BE) distributions

a. The MB, FD, and BE statistical factors agree only at low particle energies. b. The MB distribution models only low-density material, while both the FD and BE distributions can model higher density material. c. The MB statistical factor goes to infinity at low particle energies, while the FD statistical factor goes to 1/2 and the BE statistical factor goes to 1. d. The MB and FD distributions work only for distinguishable particles while the BE distribution works for indistinguishable particles. e. The MB distribution works for particles with integer spin, the FD distribution works for particles with half-integer spin, and the BE distribution works for particles with any value of spin.

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Physics & Space Science

An object is placed 15. cm from a concave mirror of focal length 20. cm. If the object is 4.0 cm tall,

(a) where is the image formed? (b) how tall is it?

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Physics & Space Science

The theory of seafloor spreading was proposed in 1960 by

a. Alfred Wegener. b. Harry Hess. c. Albert Einstein. d. Andrija Mohorovicic.

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Physics & Space Science