A(n) ____________ is a solar-system object that enters Earth's atmosphere and becomes very hot due to friction between the object and Earth's atmosphere and does not survive to reach the surface
a. asteroid
b. meteor
c. comet
d. meteoroid
e. planetesimal
b
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Energy in the Electric Field: At a distance d from a point charge Q, the energy density in its electric field is u. If we now go to a distance d/2 from the charge, what is the energy density at the new location?
A. 16u
B. 8u
C. 4u
D. 2u
E. u
Discuss the extinction of the dinosaurs, relating it to an astronomical event
What will be an ideal response?
Telescope A has a mirror twice the diameter of telescope B's mirror. How does A's light-gathering power compare to B's?
A. A gathers 1/4th as much light as B does. B. A gathers 4 times the light that B does. C. A gathers 1/2 the light that B does. D. A gathers twice the light that B does.
When an electron moves in a direction opposite to the electric field, its potential increases but the potential energy decreases
Indicate whether the statement is true or false