If a force on an object is aimed in the direction of the object's velocity, the force does

a. no work. b. positive work.
c. negative work. d. any of the above.


b

Physics & Space Science

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In the above model of an atom, where is the neutron located, assuming a neutron is present?


a. A
b. 1
c. 2
d. 3

Physics & Space Science

Does the Sun ever set north of due west for an observer located at Washington, D.C. (39°N)? What time of year would this occur?

Physics & Space Science

Using the assumption that it takes several billion years for complex life to evolve in a stable environment, it is most likely that the stars with inhabited planets are:

A) G and K main sequence stars. B) white dwarf stars. C) A and B main sequence stars. D) neutron stars.

Physics & Space Science

The work energy theorem says

A) the net work done is equal to the initial kinetic energy less the final energy. B) the net work done plus the final kinetic energy is the initial kinetic energy. C) the net work done plus the initial kinetic energy is the final kinetic energy. D) the net work done minus the initial kinetic energy is the final kinetic energy. E) final kinetic energy plus the net work done is the initial kinetic energy.

Physics & Space Science