A horizontal 2.00-m long, 5.00-kg uniform beam that lies along the east-west direction is acted on by two forces. At the east end of the beam, a 200-N forces pushes downward. At the west end of the beam, a 200-N force pushed upward
What is the angular acceleration of the beam? A) 240 rad/s2 north
B) 1.33 × 102 rad/s2 north
C) zero
D) 240 rad/s2 south
E) 1.33 × 102 rad/s2 south
A
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Which of the following statements about ozone (in Earth's stratosphere) is not true?
A) The presence of ozone was crucial to the origin of life some 4 billion years ago. B) Ozone is a form of oxygen. C) Ozone absorbs harmful ultraviolet light from the Sun. D) Without this ozone, Earth would not have a stratosphere.
A quanton is moving in a classically allowed region. If the quanton would classically have at point xA twice the kinetic energy it would have at point 
, how would the wavelengths of an energy eigen function of the quanton compare at these points?
A. ?A = 2?B
B. ?A = 
?B
C. ?B = ?A
D. ?B = 2?A
E. ?B = 4?A
If an element has 10 protons and 11 neutrons and 10 electrons, which expression correctly identifies the element?
A) neon-21 B) neon-11 C) neon-31 D) sodium-11 E) sodium-20
A light bulb used in a slide projector draws a current of 6 amperes when operating on 120 volts.The resistance of the light bulb in ohms is
a. 0.05 b. 20. c. 720 d. none of the above.