Why do new stars generally form in close proximity?
What will be an ideal response?
As a gas cloud collapses, it breaks into smaller fragments. Each of these fragments in turn break into still smaller fragments. As the process continues, the small fragments become protostars and then stars.
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The energy attributed to an object by virtue of its motion is known as
A) potential energy. B) kinetic energy. C) radiative energy. D) mass-energy.
A straight wire is carrying a current of 2.0 A. It is placed at an angle of 60° with respect to a magnetic field of strength 0.20 T. If the wire experiences a force of 0.40 N, what is the length of the wire?
A) 1.8 m B) 1.6 m C) 1.2 m D) 1.0 m E) 1.4 m
Magazine paper is shiny because it is coated with clay. Why would it be wise to separate magazines from newspapers?
What will be an ideal response?
Compare the energy in a kilogram of gasoline to that in a kilogram of flashlight batteries
A. The gasoline has about 400 times as much energy. B. The gasoline has about 10 times as much energy. C. The gasoline has about 70 times less energy. D. They cannot be honestly compared, since one stores power and the other stores energy.