In the figure shown, the coefficient of kinetic friction between the block and the incline is 0.29. What is the magnitude of the acceleration of the suspended block as it falls? Disregard any pulley mass or friction in the pulley
a.
5.4 m/s2
b.
5.2 m/s2
c.
4.9 m/s2
d.
5.6 m/s2
e.
7.9 m/s2
c
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The youngest parts of Earth's crust are
a. the bottom layer found in the walls of the Grand Canyon. b. the continents. c. the continental margins. d. the Appalachian Mountains. e. the mid-ocean rifts.
Even though your car weighs several thousand pounds, it can easily be raised above your head by a pneumatic lift at the service station by a small motor pumping fluid through a pipe. This an illustration of
A. Bernoulli's Law. B. Pascal's Principle. C. Archimedes' Principle. D. Newton's 3rd Law.
Consider two parallel wires carrying current in opposite directions. Which one of the following statements to true concerning this situation?
a) The two wires will attract each other, even if no external magnetic field is applied to the wires. b) The two wires will repel each other, even if no external magnetic field is applied to the wires. c) The two wires will attract each other, only if an external magnetic field is applied to the wires. d) The two wires will repel each other, only if an external magnetic field is applied to the wires. e) The wires will be neither attracted nor repelled from each other when no external magnetic field is applied to the wires.
A tennis ball bounces on the floor three times. If each time it loses 22.0% of its energy due to heating, how high does it rise after the third bounce, provided we released it from the floor?
A) 110 cm B) 11 cm C) 110 mm D) 140 cm