An extremely large collection of stars bound together by gravitational attraction and occupying a huge volume of space is called a(n) ______________
Fill in the blank(s) with correct word
galaxy
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Ice has a latent heat of fusion of 80 kcal/kg. How much heat is required to melt 200 g of ice?
A) 400 J B) 160 J C) 67 kJ D) 32 kJ E) 16 kJ
Conversion of Units: The following conversion equivalents are given: 1.0 mile = 5280 ft 1.0 ft = 12 in 1 m = 39.37 in1.0 hour = 60 min 1.0 min = 60 sIf a deer runs at 4.7 mi/h, its speed, in meters per second, is closest to
A. 2.1 m/s. B. 1.7 m/s. C. 1.9 m/s. D. 2.3 m/s. E. 2.5 m/s.
Electric potential, measured in volts, is the ratio of electric energy to the amount of electric
A) current. B) resistance. C) charge. D) voltage. E) none of the above
Two identical balls are at rest and side by side at the top of a hill. You let one ball, A, start rolling down the hill. A little later you start the second ball, B, down the hill by giving it a shove. The second ball rolls down the hill along a line parallel to the path of the first ball and passes it. At the instant ball B passes ball A:
A. it has the same position and the same velocity as A. B. it has the same position and the same acceleration as A. C. it has the same velocity and the same acceleration as A. D. it has the same displacement and the same velocity as A. E. it has the same position, displacement and velocity as A.