Which of the following statements is true of Jupiter?
A) It is more than 5.5 times denser than water.
B) The interior of Jupiter is mostly liquid helium.
C) The rocky core at Jupiter's center contains light elements.
D) It has a slightly flattened shape.
D
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A 320-g air track cart traveling at 1.25 m/s collides elastically with a stationary 270-g cart. What is the speed of the 320-g cart after the collision?
A) 0.678 m/s B) 0.106 m/s C) 0.212 m/s D) 1.36 m/s E) 1.14 m/s
2 600 rev/min is equivalent to which of the following?
a. 2 600 rad/s b. 43.3 rad/s c. 272 rad/s d. 60.0 rad/s
A car is driven 1200 m north at 20.0 m/s and then driven 1600 m east at 25.0 m/s. What are the magnitude and direction of the displacement for this trip?
A. 1400 m, northeast B. 2000 m, 36.9° north of east C. 2000 m, 53.1° north of east D. 2800 m, 36.9° east of north E. 2800 m, 53.1° east of north
A solid object is made of two materials, one material having density of 2 500 kg/m3 and the other having density of 6 000 kg/m3 . If the object contains equal volumes of the materials, what is its average density?
a. 3 529 kg/m3 b. 4 250 kg/m3 c. 5 250 kg/m3 d. 8 500 kg/m3 e. more information is needed