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In a simple model of the hydrogen atom, the electron moves in a circular orbit of radius 0.053 nm around a stationary proton. How many revolutions per second does the electron make?
Two 5000 kg passenger cars roll without friction (one at 1 m/s, the other at 2 m/s) toward one another on a level track. They collide, couple, and roll away together with the combined momentum.
A 2 g lead (cp = 128 J/kg•°C) bullet travelling at 325m/s is stopped by the large tree. If half the kinetic energy of the bullet is transformed into internal energy and remains with the bullet whereas the other half is transmitted to the tree, wha..
Two boxes (m1 = 46.0kg and m2 = 29.0kg ) are connected by a light string that passes over a light, frictionless pulley. Find the acceleration of each box
Near the earth the intensity of radiation from the sun is 1.35 kW/m2. What volume of space in this region contains 1.0 J of electromagnetic energy? (c = 3.0 x 108 m/s, ?0 = 4? × 10-7 T ? m/A, ?0 = 8.85 × 10-12 C2/N ? m2) options:
A crane is being used to lift a container onto a cargo ship. What is the maximum power the crane must provide to the container during lift
Cheetahs, fastest of the great cats, can reach 45 in 2 starting from rest. Assume that they have constant acceleration throughout that time, find their acceleration (in (a) and (b) ) and the distance (in (c) and (d) ) Q2. They travel during that t..
In a very busy off-campus eatery one chef sends a 239-g broccoli-tomato-pickle-onion-mushroom pizza sliding down the counter from left to right at 1.79 m/s. n what direction does the delectible dish move, if it moves at all
What must be the mass m2 of the hanging block if it is to descend 11.0m in the first 3.00s after the system is released from rest
When cars are equipped with flexible bumpers, they will bounce off each other during low-speed collisions, thus causing less damage. What is the speed of the lighter car just after collision
A ball is thrown up with a velocity of 8 m/s and allowed to fall back down. how long will the ball take to return to its initial position
The eyepiece of a refracting astronomical telescope (see the figure) has a focal length of 8.75 c. What is the angular magnification of the telescope
A system consisting entirely of electrons and protons has a net charge of 1.83 10-15 C and a net mass of 4.61 10-23 kg. How many electrons are in this system
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