How much electrical charge is needed to raise an isolated metal sphere of radius 1.0 m to a potential of 1.0 × 10^6 V?
1.1 × 10^?4 C
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In the context of astronomy, a habitable zone is:
A) a region on a planet where conditions are acceptable for life to exist. B) a region around a star where a planet's temperature would permit the existence of liquid water. C) a region on a young planet where amino acids can begin to form deoxyribonucleic acid (DNA) molecules. D) a region around a star where different types of planets can form.
An important condition for the operation of the Falkirk Wheel is that
A) water in each caisson have the same depth. B) ships carried are more or less equal in weight. C) no water spill when a ship enters a caisson. D) all of the above E) none of the above
A small sphere attached to a light rigid rod rotates about an axis perpendicular to and fixed to the other end of the rod. Relative to the positive direction of the axis of rotation, the angular positions of the sphere are negative, its angular velocity is negative, and its angular acceleration is positive. The sphere is
a. rotating clockwise and slowing down. b. rotating counterclockwise and slowing down. c. rotating clockwise and speeding up. d. rotating counterclockwise and speeding up. e. first rotating counterclockwise and then clockwise.
A horizontal force of magnitude 6.5 N is exerted tangentially on a Frisbee of mass 32 grams and radius 14.3 cm. Assuming the Frisbee, a uniform disk, is originally at rest and the force is exerted for 0.08 s, determine the angular velocity of rotation about the central axis when the Frisbee is released