Two objects are at rest on a frictionless surface. Object 1 has a mass that is twice that of Object 2. When a constant force is applied to Object 1, it accelerates for a time interval ?t. The force is removed from Object 1 and is then applied to Object 2. After Object 2 has been accelerated for the same time interval, which statements are true?
(i) p2 = 2p1
(ii) p2 = p1
(iii) p2 = ½ p1
(iv) KE2 = 2KE1
(v) KE2 = KE1
(vi) KE2 = ½ KE1
1.(i) and (vi)
2.(ii) and (iv)
3.(i) and (v)
4.(iii) and (v)
2
You might also like to view...
What becomes of the heavy elements produced by fusion in low-mass stars?
A. When the star goes supernova, they are sucked into the neutron star or black hole. B. They are blasted outward in a violent explosion. C. At the end of the star's life, they are dredged up by convection and pushed outward by photons. D. They are forever trapped in the core of the star. E. Low-mass stars do not produce heavy elements.
Eddy-current NDT is well suited for detecting cracks in conducting materials that are _________.
Fill in the blank(s) with the appropriate word(s).
You are asked to design a metal alloy for a part with a room temperature application. The part is to be made by casting the metal into shape. When casting the part, liquid metal is poured into a mold that has a cavity with the shape of the part. To reduce cost by conserving energy and to utilize an inexpensive furnace that does not have a high temperature capability, it is desired that the metal alloy not have a high melting temperature. What type of metal alloy phase diagrams should you consider first for this part?
(a) Continuous solid solution (b) Eutectic (c) Compound formation (d) Peritectic
Edward Teller was
A) the discoverer of nuclear fission. B) the head of the program to develop the world's first fusion bomb. C) the inventor of radiation therapy. D) the head of the program to develop the world's first fission bomb. E) the head of the program to develop the world's first nuclear reactor.