If y = 0.02 sin (30x - 400t) (SI units), the velocity of the wave is
a. 3/40 m/s
b. 40/3 m/s
c. 60p/400 m/s
d. 400/60p m/s
e. 400 m/s
B
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A baseball is thrown and lands 120 m away. While the ball is in flight, assuming the effect of air friction is negligible, which of the following is true?
a. At maximum height the ball has its greatest kinetic energy. b. The horizontal component of the baseball's kinetic energy is constant. c. The vertical component of the baseball's kinetic energy is constant. d. The mechanical energy of the baseball is greater when nearer to the ground. e. No answer above is correct.
The volume of water displaced by a floating 20-ton boat
A) is 20 cubic meters. B) is the volume of 20 tons of water. C) is the volume of the boat. D) depends on the shape of the ship's hull. E) none of the above
What was the "solar neutrino puzzle"?
A. Neutrinos from the Sun were spontaneously changing into unexpected types. B. Neutrinos fired at the Sun's core were not reflecting properly back to Earth. C. Particle accelerators on Earth were interfering with the Sun's core. D. The sun did not produce any neutrinos, indicating it cannot be powered by fusion. E. The Sun's core was producing too many neutrinos.
In Procedure 2, what is the relationship between the acceleration and the slope of the curve? (Hint: How does Eq. 4.2 in the Laboratory Guide for acceleration compare with the equation given for slope?)