A marble rolls off a tabletop 1.0 m high and hits the floor at a point 3.0 m away from the
table's edge in the horizontal direction.
(a) How long is the marble in the air?
(b) What is the speed of the marble when it leaves the table's edge?
(C) What is its speed when it hits the floor?
Answers: 2
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An incident ray through the focal point of a spherical mirror will: reflect through the center of curvature. reflect back through the focal point. reflect parallel to the principle axis. reflect the same direction as the incident ray.
Answers: 1
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You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?
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Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?
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A marble rolls off a tabletop 1.0 m high and hits the floor at a point 3.0 m away from the
table's...
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