If one were told the object's initial velocity then one could calculate the work done by using the equations for constant acceleration to find the distance traveled. When we say work is done by a force, we mean the force does
a. all the work c. negative work
b. positive work d. zero work
B
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The change in length of a material per degree divided by the original length is the linear coefficient of thermal _____________.
Fill in the blank(s) with the appropriate word(s).
What are the important relics of the lepton epoch? Why are they important?
What will be an ideal response?
Suppose you had molecular oxygen (O2 ) chilled enough so that it was in liquid form. Which of the following best describes the phase changes that would occur as you heated the liquid oxygen to high temperature?
A) It would evaporate into a gas, then the molecules would dissociate into individual oxygen atoms, then the atoms would become increasingly ionized as you continued to raise the temperature. B) The liquid molecules would quickly dissociate into a liquid of individual oxygen atoms. These atoms would then evaporate into a gas, and then become ionized to make a plasma. C) It would vaporize into a gas, then the molecules would lose electrons until no electrons were left, then the molecules would dissociate into individual oxygen nuclei. D) The cold temperature would first cause the oxygen to solidify. The solid would then sublimate into a gas, which would then become a plasma as the molecules lost their electrons, until finally it consisted of bonded pairs of oxygen nuclei stripped bare of any electrons.
Cold fusion has
a. solved the world's energy crisis. b. been used to create superheavy elements. c. been achieved using muons. d. rendered nuclear reactors obsolete.