The Gateway Arch in St. Louis, Missouri is 630 feet tall. Express this distance in meters and in kilometers
192 m, 0.192 km
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A point charge Q = 7.00 × 10-9 C is placed at the origin of an xy-coordinate system. What is the electric field intensity E at a distance of x = 30 cm from this charge? (Use k = 9 × 109 Nm2/C2.)
A) 100 N/C B) 400 N/C C) 500 N/C D) 600 N/C E) 700 N/C
Which of the following statements about the moons of the jovian planets is true?
A) Most of the moons have the potato-like shapes of asteroids, but a few are large enough to be spherical in shape. B) Even the biggest moons are smaller than any of the planets or dwarf planets in our solar system. C) All of the moons are barren and essentially airless, like our own Moon. D) The moons are made almost entirely of rock and metal.
A brass rod, 4.0 m long and with a cross sectional area of 9.2 × 10-6 m2 is subjected to a tension of 6.0 × 103 N/m2. The Young's modulus for brass is 9.0 × 1010 N/m2, and the Poisson ratio is 0.48. By how much does the volume of the rod change?
A) 6.3 × 10-7 m3 B) 0.029 m3 C) 2.7 × 10-7 m3 D) 4.0 × 10-7 m3 E) 5.2 × 10-7 m3
A circular loop of wire is in the plane of the paper. The south pole of a bar magnet is being moved from a position in front of the paper in a direction away from the center of the loop. The direction of the induced current in the loop
A) is clockwise. B) is north. C) is counterclockwise. D) is south. E) cannot be determined.