A 250-kg motorcycle goes around an unbanked turn of radius 13.7 m at a steady 96.5 km/h. What is the magnitude of the net force on the motorcycle?
A) 719 N
B) 2.95 × 103 N
C) 1.31 × 104 N
D) 4.31 × 104 N
C
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Why does something weigh less on the Moon than on Earth?
A. The Moon has no atmosphere to apply a downward force on surface objects. B. Earth's gravity pulls in the opposite direction as the Moon's, so the net force is reduced. C. The farther something is from Earth, the lower its weight. D. The Moon's lower mass creates a lower force of gravity at its surface. E. The object's weight is the same on the Moon as it is on Earth.
Internal energy in thermodynamics is the same as
A) temperature. B) thermal energy. C) heat. D) all of the above
The reason the jovian planets lost very little of their original atmosphere is due to their:
A) rapid rotation. B) strong magnetic fields. C) ring systems. D) large mass. E) many moons.
Which process would release energy from gold, fission or fusion? From carbon?
A) gold: fission; carbon: fusion B) gold: fusion; carbon: fission C) gold: fission; carbon: fission D) gold: fusion; carbon: fusion