Of the methods listed below, which is the best for measuring the distance to the Andromeda galaxy, a member of the Local Group?
A. Hubble's law
B. trigonometric parallax
C. the Cepheid variable period-luminosity relationship
Answer: C
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An apple weighing 3 newtons hangs, motionless, from a tree branch. Newton's law of force pairs says that forces always come in pairs. One force acting on the apple is the apple's weight
What is the other force that forms a force pair with the weight? A) The apple pulling upward on Earth. B) The apple pulling downward on the branch. C) Earth pulling downward on the apple. D) The branch pulling upward on the apple.
A 2.00 kg pendulum bob on a string 3.00 m long is released with a velocity of 1.00 m/s when the support string makes an angle of 30.0 degrees with the vertical. What is the tension in the string at the highest point of its motion?
A. 30.8 N B. 27.5 N C. 20.1 N D. 16.6 N E. 10.5 N
Significant Figures: Add 1299 g and 45.1 kg and express your answer in milligrams (mg) to the correct number of significant figures.
A. 4.64 × 107 mg B. 4.64 × 104 mg C. 4.64 × 105 mg D. 4.64 × 106 mg
____ pushed gas and dust particles out of the solar nebula by the light from the sun
a. Radiation pressure b. Outgassing c. Condensation d. Accretion e. Differentiation