The frequency of a wave describes ________.
A. the speed at which a wave crest passes a given point
B. the number of wave crests that pass a given point in 1 second
C. the distance between two successive peaks in a wave
D. the time it takes for two crests to pass a given point
Answer: B
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Three boxes rest side-by-side on a smooth, horizontal floor. Their masses are 5.0 kg, 3.0 kg, and 2.0 kg, with the 3.0-kg mass in the center. A force of 50 N pushes on the 2.0-kg mass, which pushes against the other two masses
What is the contact force between the 5.0-kg mass and the 3.0-kg mass? A) 0 N B) 10 N C) 25 N D) 40 N E) 50 N
The position of a mass that is oscillating on a spring is given by x = (17.4 cm) cos[(5.46 s-1)t]. What is the period of this motion?
A) 1.74 s B) 1.15 s C) 1.32 s D) 0.869 s E) 0.314 s
What evidence is there for scientists to believe Uranus has some internal heat?
a. active volcanoes spewing methane gas and ash b. convection in the fluid mantle driving the dynamo effect c. a molten metallic core d. craters on the surface that are small and filled by lava e. a severe axis tilt leads to more absorption of heat from the Sun
The Higgs field, if it is discovered, is expected to interact
A) with every type of particle. B) only with particles that have rest mass. C) only with particles that are electrically charged. D) only with particles that have no rest mass. E) only with particles that are not electrically charged.