The attraction between like substances, stickiness, is called
A) adhesion.
B) cohesion.
C) depends on the substances.
Answer: B
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How long is a day on Mars?
A) 243 Earth days B) about 4.2 Earth days C) 24 hours, 36 minutes D) 23 hours, 56 minutes E) 9 hours, 55 minutes
A conducting rod (length = 80 cm) rotates at a constant angular rate of 15 revolutions per second about a pivot at one end. A uniform field (B = 60 mT) is directed perpendicularly to the plane of rotation. What is the magnitude of the emf induced between the ends of the rod?
A. 2.7 V B. 2.1 V C. 2.4 V D. 1.8 V E. 3.3 V
Does a high-speed bullet's path bend more than a light beam bends as it passes near Earth?
A) Yes, because the bullet is heavier than the light beam. B) Yes, because the light beam has a greater acceleration that the bullet. C) Yes, because the bullet moves slower than the light beam. D) No, because all falling objects accelerate at the same rate. E) No, because of Einstein's equivalence principle.
The type of EM radiation that causes your skin to tan is
a. ultraviolet. b. infrared. c. x-rays. d. microwave. e. gamma rays.