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A doubly charged helium atom whose mass is 6.6 ×10?27kg is accelerated by a voltage of 2700V .
A) What will be its radius of curvature if it moves in a plane perpendicular to a uniform 0.370 ?T field?
B) What is its period of revolution?
Two tiny conducting spheres with a mass of 15gm each are hanging from non-conducting threads of length 70cm such that they are 4cm apart as shown to the left.
A second converging lens of focal lenght 12 cm is placed to the right of the first lens. If the final image of the combined lens system is virtual and 15 cm from the second lens, then compute the distance between the two lenses
A spelunker is surveying a cave. She follows a passage 150m straight west, then 230m in a direction 45, Use a scale drawing to determine the magnitude of the fourth displacement, Determine the direction of the fourth displacement
A 64 woman stands on a very light, rigid board that rests on the bathroom scale at each end. 1.5 m left of her and 2.0m total. what is the reading on each of the scales.
What is the potential difference across capacitor. How much charge is on each place.
What is the formula for the acceleration a of the cart in terms of the cart's mass M, the hanger's mass m, and the acceleration of gravity g?
An 77 kg quarterback jumps straight up in the air right before throwing a 0.43 kg football horizontally at 15 m/s. Illustrate how fast will he be moving backward just after releasing the ball?
A 45 kg girl is standing on a 130 kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. The girl begins to walk along the plank at a constant velocity of 1.33 m/s relative to the plank.
A rock of mass 44 kg accidentally breaks loose from edge of a cliff and falls straight down. The magnitude of the air resistance that opposes its downward motion is 252 N. What is the magnitude of the acceleration of the rock?
What is the concentration of the Cd in the soil if the city of Des Moines adds 3 tons of compost/ acre-6 inches given the compost contains 50 ppm Cd
what is the lumberjack's speed relative to the shore? Neglect friction between the log and the water.
A ball is released from a hot air balloon moving downward with a velocity of -10.0 meters/second and a height of 1,000 meters. How long did it take the ball to reach the surface of Earth? Given: g = -9.8 meters/second2. A. 11.2 seconds B. 12.1 sec..
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