A boat floating in a large pool is loaded with solid iron bars. The water level at the pool's edge is marked with a red line. The iron is now thrown overboard. When the water becomes calm again,
A. the red line is slightly lower than the water level.
B. the red line is still at the water level.
C. the red line is slightly higher than the water level.
Answer: C
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A 0.50-kg box is attached to an ideal spring of force constant (spring constant) 20 N/m on a horizontal, frictionless floor. The box oscillates in simple harmonic motion and has a speed of 1.5 m/s at the equilibrium position
(a) What is the amplitude of vibration? (b) At what distance from the equilibrium position are the kinetic energy and the potential energy the same?
Celestial latitude is called
a. declination. b. right ascension. c. the parsec value. d. the zenith angle.
Define the term viscosity.
What will be an ideal response?
A spaceship departs from the solar system (event A) and travels at a constant velocity to a distant star. It then returns at a constant velocity, finally returning to the solar system (event B). A clock on the spaceship registers which of the following kinds of time between these events?
A. Proper time B. Coordinate time C. Space time interval D. Proper time and space time interval E. Coordinate time and space time interval F. All three