How do high mass stars transport newly formed elements into the interstellar medium?
A) supernova explosions
B) stellar winds
C) formation of planetary nebula
D) A and B
E) A and C
D
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Rotational Kinetic Energy: An Atwood machine consists of a mass of 3.5 kg connected by a light string to a mass of 6.0 kg over a frictionless pulley with a moment of inertia of 0.0352 kg ? m2 and a radius of 12.5 cm. If the system is released from rest, what is the speed of the masses after they have moved through 1.25 m if the string does not slip on the pulley?
A. 2.0 m/s B. 2.3 m/s C. 4.0 m/s D. 5.0 m/s E. 6.0 m/s
You discover an impact crater that is 10 kilometers across. Which of the following can you conclude?
A) It was created by the impact of an object about 10 kilometers across. B) It was created within the past 10 million years. C) It was created within the past 1 billion years. D) It was created by the impact of an object about 1 kilometer across.
A spaceship approaches the Moon, traveling at 0.5c with respect to the Moon. Its crew shines a laser at the Moon. The beam strikes a lunar mirror and is reflected back to the ship. The crew on the ship will measure the speed of the reflected beam to be
A. 1.5c. B. 0.75c. C. 2.0c. D. c. E. 0.5c.
Which of the following would be different for a person on the Moon rather than on Earth?
a. Weight b. Height c. Volume d. Mass