The equation for the change of position of a train starting at x = 0 m is given by 
. The dimensions of b are
A. T?3
B. LT?3
C. LT?2
D. LT?1
E. L?1T?1
Answer: B
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The observed distribution of matter in the Universe is best understood as being caused by ____
a. clumping of dark matter in the early Universe causing clumping of normal matter b. clumping of normal matter in the early Universe causing clumping of dark matter c. simultaneous clumping of normal and dark matter d. large variations in the intensity of the cosmic microwave background e. homogenous expansion of normal and dark matter
Photon Energy: For what wavelength does a 100-mW laser beam deliver 1.6 × 1017 photons in one second? (c = 3.0 × 108 m/s, h = 6.626 × 10-34 J ? s)
A. 320 nm B. 330 nm C. 340 nm D. 350 nm
With molar quantity and temperature held constant, by what factor does the pressure of an ideal gas change when the volume is five times bigger?
a. 1/5 b. 1 c. 5 d. 25
Foucault's pendulum:
a. continues to swing back and forth in the same fixed direction relative to the ground. b. keeps swinging faster because the centrifugal force of Earth's rotation affects its weight. c. changes how far it goes on each swing because of Earth's motion around the Sun. d. changes the direction of its back and forth swing because Earth rotates beneath it. e. changes the direction of its back and forth swing because of gravity.