If the magnification produced by an optical system is negative, the image is
a. smaller than the object.
b. inverted.
c. upside down.
d. all of the above.
b, c
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Energy Conservation With Conservative Forces: A frictionless simple pendulum, with a small but dense 4.4-kg mass at the end and a length of 75 cm, is released from rest at an angle of 50° with the vertical.(a) To what height above its lowest point does the mass swing on the other side?(b) What is the speed of the mass at the bottom of the swing?
What will be an ideal response?
If the density of the Universe is less than the critical density, then
A. the Universal expansion will eventually stop sometime in the future. B. the Universe will eventually stop expanding, and then begin to collapse until it ends in a Big Crunch. C. the Universe will not change because its evolution does not depend on the critical density. D. the Universe will expand forever.
When a rocket forces exhaust gases downward, the exhaust gases
A) as the name implies, soon exhaust their influence. B) play no further role in the motion of the rocket. C) exert an upward force on the rocket.
What is the origin of Io's volcanism?
What will be an ideal response?