What would happen to Jupiter if we could somehow double its mass?
A) Its density would increase, but its diameter would barely change.
B) Its density would decrease and its diameter would double.
C) Its density would stay about the same and its volume would double.
D) It would become a star, with nuclear fusion in its core.
A) Its density would increase, but its diameter would barely change.
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A ball thrown horizontally from a point 24 m above the ground, strikes the ground after traveling horizontally a distance of 18 m. With what speed was it thrown, assuming negligible air resistance?
A) 6.1 m/s B) 7.4 m/s C) 8.1 m/s D) 8.9 m/s
Angela claims that she wears a cylindrical-shaped hollow gold bracelet because it expands less than a solid one with a change in temperature. Clarissa claims that a cylindrical-shaped solid gold bracelet expands less than a hollow one. Which one, if either, is correct?
a. Angela, because the bracelet expands outward on its outer surface and inward on its inner surface. b. Clarissa, because the bracelet expands outward on its outer surface and inward on its inner surface. c. Angela, because the inner circumference does not change, but the outer circumference expands. d. Clarissa, because the inner circumference does not change, but the outer circumference expands. e. Neither, because both the inner and outer circumferences increase in length.
The pilot of an aircraft flies due north relative to the ground in a wind blowing 40 km/h toward the east. If his speed relative to the ground is 80 km/h, what is the speed of his airplane relative to the air?
a. 89 km/h b. 85 km/h c. 81 km/h d. 76 km/h e. 72 km/h
As plant engineer, Donna purchases an electrical motor which has an output of 1500. hp. If it requires 1.20 Megawatts of electricity, what is the efficiency of the motor?
What will be an ideal response?