Two identical tiny balls of highly compressed matter are 1.50 m apart. When released in an orbiting space station, they accelerate toward each other at 2.00 cm/s2. What is the mass of each of them? (G = 6.67 × 10-11 N ? m2/kg2)
What will be an ideal response?
6.75 × 108 kg
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Torque: A flat circular loop carrying a current of 2.0 A is in a magnetic field of 3.5 T. The loop has an area of 0.12 m2 and its plane is oriented at a 37° angle to the field. What is the magnitude of the magnetic torque on the loop?
A. 0.10 N ? m B. 0.51 N ? m C. 0.67 N ? m D. 46 N ? m
A 200-kg spacecraft is launched to the Moon. While in orbit around the Moon, its mass is ________.
A. zero B. 200 kg C. about 1/6 its mass on Earth D. The answer depends on how close to the Moon the ship is orbiting.
In a system with two moving objects, when a collision occurs between the objects:
a. the total kinetic energy is always conserved. b. the total momentum is always conserved. c. the total kinetic energy and total momentum are always conserved. d. neither the kinetic energy nor the momentum is conserved.
What is true of Titan's atmosphere?
A) It was discovered by the Voyager 1 spacecraft. B) It is roughly similar to Earth's in composition and density. C) It has produced a runaway greenhouse effect. D) It is oxygen rich. E) It is primarily hydrogen.