Scientists were led to postulate the existence of the neutrino in order to
A) maintain the conservation of energy and of momentum in beta decay.
B) provide a mechanism for quark production.
C) account for alpha decay.
D) explain the intense radiation emitted by quasars.
A
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If a star has a parallax of 0.05", then its distance in light-years is about
A) 6.4 light-years. B) 12.7 light-years. C) 20 light-years. D) 65 light-years. E) 100 light-years.
A light ray is incident on the surface of water (n = 1.33) at an angle of 60° relative to the normal to the surface. The angle of the reflected wave is
a. 80° b. 40° c. 20° d. 60° e. 30°
Conversion of Units: Leonardo da Vinci's Mona Lisa is 21 in. wide and 30.25 in. tall. What is the area of the painting in square centimeters? (1.00 m = 39.37 in.)
A. 4100 cm2 B. 1600 cm2 C. 660 cm2 D. 3300 cm2 E. 2400 cm2
Which of the following energy forms is stored in any compressed or stretched object?
a. nonmechanical energy b. elastic potential energy c. gravitational potential energy d. kinetic energy