A long straight wire lies on a horizontal table and carries an ever-increasing current toward the north. Two coils of wire lie flat on the table, one on either side of the wire
When viewed from above, the direction of the induced current in these coils is A) clockwise in both coils.
B) counterclockwise in both coils.
C) clockwise in the east coil and counterclockwise in the west coil.
D) counterclockwise in the east coil and clockwise in the west coil.
D
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In Brazil, the longest period of daylight and the start of summer occurs during the month of
a. December. b. March. c. September. d. June.
Mars has two moons, Phobos and Deimos, that are most similar in character to
A) small asteroids. B) comets. C) Earth's Moon. D) particles in the rings of Saturn.
Bats can detect small objects such as insects that are of a size on the order of a wavelength. If bats emit a chirp at a frequency of 60 kHz and the speed of soundwaves in air is 330 m/s, what is the smallest size insect they can detect?
A. 1.5 mm B. 3.5 mm C. 5.5 mm D. 7.5 mm E. 9.8 mm
Yuri, a Russian weightlifter, is able to lift 260 kg 2.10 m in 2.20 s. What is his power output?
a. 546 W b. 2.43 kW c. 1.21 kW d. 11.8 kW e. 24.3 kW