The two metallic strips that constitute some thermostats must differ in:
A. length
B. thickness
C. mass
D. rate at which they conduct heat
E. coefficient of linear expansion
Answer: E. coefficient of linear expansion
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If you measure a parallax of 0.006 arc seconds from an observatory on the ground, your uncertainty will be about _____
A) 10 percent B) 75 percent C) 30 percent D) 57 percent
What are we seeing in this Hubble Space Telescope photograph?
A) Almost every object in the photo is a galaxy, and these galaxies are at many different distances from us. B) This photo shows the Virgo supercluster of galaxies. C) Most of the dots in this photo are stars in the Milky Way, but we see a few blotches that represent galaxies beyond the Milky Way. D) This is the Local Group of galaxies.
Which is Saturn's largest satellite?
a. Ganymede b. Enceladus c. Phoebe d. Titan e. Callisto
What is the net power needed to change the speed of a 1600-kg sport utility vehicle from 15.0 m/s to 40.0 m/s in 4.00 seconds?
A) 100 kW B) 10.0 kW C) 140 kW D) 14.0 kW E) 275 kW