Current: A 10-A current flows through a wire for 2.0 min. (e = 1.60 × 10-19 C)(a) How much charge has passed through this wire?(b) How many electrons have passed any point in the wire?
What will be an ideal response?
(a) 1200 C (b) 7.5 × 1021
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According to the theory of general relativity, gravity is caused by the ____
a. linear motion of stars b. change in mass of a moving body c. curvature of space-time d. constant speed of light e. inertia of a moving body
A disk, a hoop, and a solid sphere are released at the same time at the top of an inclined plane. They all roll without slipping. In what order do they reach the bottom?
A) disk, hoop, sphere B) hoop, sphere, disk C) sphere, disk, hoop D) hoop, sphere, disk E) hoop, disk, sphere
A solid ball of mass 1.0 kg and radius 10 cm rolls with a forward speed of 10 m/s when it comes to a hill. There is enough friction on the hill to keep the ball from slipping as it rolls up
(a) How high vertically up the hill can the ball roll before coming to rest? (b) How high vertically could the ball go if the hill were totally frictionless? (c) How is it that the ball can go higher with friction than without friction?
A thin ribbon of a silver alloy 2.00-cm wide and 0.015 0-mm thick carries a current of 6.98 A perpendicular to a magnetic field. The Hall voltage is found to be 1.24 × 10^?4 V when the magnetic field is 2.50 T. Calculate n, the number of charge carriers per cubic meter