In a thermally insulated kitchen, an ordinary refrigerator is turned on and its door is left open. The temperature of the room:
A. remains constant according to the first law of thermodynamics
B. increases according to the first law of thermodynamics
C. decreases according to the first law of thermodynamics
D. remains constant according to the second law of thermodynamics E. increases according to the second law of thermodynamics
Answer: B. increases according to the first law of thermodynamics
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An explorer walks into a lab in a science building. She has a compass in her hand and finds that the south pole of her compass points toward the room's East wall when she is nearer that wall and toward the west wall when she is nearer that wall. You could explain this if magnetized metal had been installed in the East and West walls with North poles pointing into the room. If no magnetic material
was installed in the North or South walls of the room, she would expect that a. the south pole of the compass would tend to point toward those walls. b. the north pole of the compass would tend to point toward those walls. c. the compass needle would not point in any particular direction. d. the north pole of the compass needle would tend to point toward the centers of those walls, but the south pole would tend to point toward the sides of those walls. e. the south pole of the compass needle would tend to point toward the centers of those walls, but the north pole would tend to point toward the sides of those walls.
What is nature's speed limit??
A: Refractive index. B: Planck's constant. C: Frequency of light. D: Wavelength of light. E: Speed of light.
When a 4-cubic-ft block of wood floats in a fluid whose weight density is 60 pounds per cubic foot, 3/4 of the block's volume is submerged. The buoyant force on the block is __________
Fill in the blank(s) with correct word
The type of detector that uses a magnetic field to curve charged particles is a
A) Geiger tube. B) scintillation counter. C) cloud chamber. D) bubble chamber. E) spark chamber.