Consider the three situations shown below. In each case two small carts are connected by a spring. A constant force F is applied to the leftmost cart in each case. In each situation the springs are compressed so that the distance between the two carts never changes
5
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At what distance from a long straight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of Earth's magnetic field of about 5.0 × 10-5 T? (?0 = 4? × 10-7 T ? m/
A) A) 1.0 mm B) 1.0 cm C) 2.0 cm D) 3.0 cm E) 4.0 cm
A point charge (-5.0 mC) is placed on the x axis at x = 4.0 cm, and a second charge (+5.0 mC) is placed on the x axis at x = -4.0 cm. What is the magnitude of the electric force on a third charge (+2.5 mC) placed on the y axis at y = 3.0 cm?
a. 90 N b. 45 N c. 54 N d. 72 N e. 36 N
The polar caps on Mars are composed of
A) frozen carbon dioxide only. B) water ice only. C) both frozen carbon dioxide and water ice. D) frozen hydrogen. E) salt deposits.
A 20-mF capacitor charged to 2.0 kV and a 40-mF capacitor charged to 3.0 kV are connected to each other, with the positive plate of each connected to the negative plate of the other. What is the final charge on the 20-mF capacitor after the two are so connected?
a. 53 mC b. 27 mC c. 40 mC d. 80 mC e. 39 mC