What are the mass number and the atomic number for each of the following:
(a) beta+?
(b) beta-?
(a) 0, 1
(b) 0, -1
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An object is 50 cm from a concave mirror with radius of curvature of magnitude 60 cm. What is the lateral magnification produced by the mirror?
A) +0.40 B) +0.70 C) +1.5 D) -0.70 E) -1.5
A 100 gram glass container contains 200 grams of water at 
A 200 gram piece of lead at 150
is added to the water in the container. What is the final temperature of the system? (specific heat of water 
specific heat of glass 837.2 J/km 
specific heat of lead = 127.7 J/km
A. 12
B. 14
C. 23
D. 31
E. 37
Superconductors have a primary advantage in that they will _______
a. reduce heating losses in transmission lines b. provide large magnetic fields for levitation c. be able to conduct more current d. allow electric motors to run almost forever
A weight of mass m is at rest at O when suspended from a spring, as shown. When it is pulled down and released, it oscillates between positions A and B. Which statement about the system consisting of the spring and the mass is correct?
A. The gravitational potential energy of the system is greatest at A. B. The elastic potential energy of the system is greatest at O. C. The rate of change of momentum has its greatest magnitude at A and B. D. The rate of change of gravitational potential energy is smallest at O. E. The rate of change of gravitational potential energy has its greatest magnitude at A and B.