A spring (k = 600 N/m) is at the bottom of a frictionless plane that makes an angle of 30° with the horizontal. The upper end of the spring is depressed 0.10 m, and a 2.0-kg block is placed against the depressed spring. The system is then released from rest. What is the kinetic energy of the block at the instant it has traveled 0.10 m and the spring has returned to its uncompressed length?
a. 2.0 J
b. 1.8 J
c. 2.2 J
d. 1.6 J
e. 1.0 J
a
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Special relativity says that time is a separate ________ in the workings of the universe
Fill in the blank(s) with correct word
Modern day living stromatolites which resemble ancient stromatolites very closely have been found in
A) the Yucatan peninsula, Mexico B) South West Greenland C) Western Australia D) Yellowstone National Park, U.S.A.
What would you expect to be different in a planetary system in which the nebular gas is blown into interstellar space by a stellar wind earlier than occurred in our solar system?
A) No terrestrial planets would form. B) Jovian planets would be less massive because they had less time to gather hydrogen and helium gas. C) All planets would be more massive than Jupiter. D) Most of the planets would be destroyed by migration onto the central star.
Fourier discovered that periodic waves can be represented by
A) a series of non-periodic waves. B) the summation of a series of simple sine waves. C) a binary code. D) pulses of the same amplitude.