What is the most accurate way to determine the distance to a relatively nearby galaxy?
A) radar ranging
B) parallax
C) using Cepheid variables
D) using white dwarf supernovae
C) using Cepheid variables
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If you add 1.33 MJ of heat to 500 g of water at 50°C in a sealed container, what is the final temperature of the steam?
The latent heat of vaporization of water is 22.6 × 105 J/kg, the specific heat of steam is 2010 J/kg ? K, and the specific heat of water is 4186 J/kg ? K. A) 100°C B) 112°C C) 123°C D) 147°C E) 195°C
Compare the engineering and true secant elastic moduli for the natural rubber in Example Problem 6.2 at an engineering strain of 6.0. Assume that the deformation is all elastic.
What will be an ideal response?
Suppose I throw a ball toward the floor. It hits the floor and rebounds upward. What type of interaction causes the ball to rebound?
A. Gravitational B. Electrostatic C. Magnetic D. Compression E. Friction F. Tension T. Something else (explain)
The moon's acceleration is directed
A) forward, along its direction of motion. B) outward, away from Earth. C) zero. D) backward, opposite to its direction of motion. E) inward, toward the center of Earth.