The compressions and rarefactions in a longitudinal wave travel in
A) the same direction.
B) opposite directions.
C) a vacuum.
Answer: A
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Process of Science: What is Occam's razor?
A) The idea that scientists should prefer the simpler of two models that agree equally well with observations. B) The principle that everyone should agree on a theory before it is considered correct. C) A long, steep cliff on Mercury that may have been produced as the planet contracted as it formed. D) The principal that any theory can be verified by others. E) An unusual implement that Professor Occam uses to remove facial hair.
A convex lens is placed on a flat glass plate and illuminated from above with monochromatic red light. When viewed from above, concentric bands of red and dark are observed
What does one observe at the exact center of the lens where the lens and the glass plate are in direct contact? A) a bright red spot B) a dark spot C) a rainbow of color D) a bright spot that is some color other than red
A carpenter is driving a nail into a board. The 1.00-kg hammer is moving at 8.50 m/s when it strikes the nail. Assume that half of the kinetic energy of the hammer is transformed into heat in the 15.0-g steel nail and does not flow out
What is the increase in temperature of the nail after the three blows that the carpenter needs to drive the nail in completely? The specific heat of steel is 448 J/(kg•K). A) 8.1 K B) 3.6 K C) 1.8 K D) 2.7 K E) 7.7 K
An object travels 7.5 m/s toward the West and under the influence of a constant net force of 5.2 kN, 4.3 s later, it is travelling 2.5 m/s toward the East. What is its mass?
A. 2200 kg B. 4500 kg C. 6000 kg D. 12000 kg