Uncertainty in the electrons momentum
An electron passes through a slit of width 7.89 10-8 m. What is the uncertainty in the electron's momentum component in the direction perpendicular to the slit but in the plane containing the slit?
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A space vehicle is orbiting Earth in a circular orbit with a radius of 10,300,000 m. What is the minimum increase in speed that is needed for the vehicle to escape Earth's gravitational field? The mass of Earth is 5.97 x 1024 kg and G = 6.67 X 10
A shopper in a supermarket pushes a cart with a force of 35 N directed at an angle of 25 downward from the horizontal. Find the work done by the shopper on the cart as the shopper moves along a 50.9 m length of aisle.
Block A, with a mass of 4 kg, is moving with a speed of 2.0m/s while block B, with a mass of 8 kg, is moving in the opposite direction with a speed of 3m/s. Calculate the center of mass of the two block-system.
The maximum tension that a 0.5m string can tolerate is 14N. A 2.5kg ball is attatced to the string being whirled in a vertical circle. What is the maximum speed the ball can have at the top of the circle? (the answer is 1.6m/s. I wanna know the s
A string under a tension of 59 N is used to whirl a rock in a horizontal circle of radius 3.9 m at a speed of 23.9 m/s. The string is pulled in, and the speed of the rock increases. When the string is 0.482 m long and the speed of the rock is 53 m
Estimate the spacing between the centers of neighboring atoms in a piece of solid aluminum, based on a knowledge of the density (2700 kg/m3) and atomic mass (26.9815 u) of aluminum.
A 3210 kg pile driver is used to drive a steel I-beam into the ground. The pile driver falls 5.13 m before contacting the beam, and it drives the beam 5.43 cm into the ground before coming to rest. Find the magnitude of the average force the beam
A 0.05-kg bullet traveling at 120 m/s tears into a slab of thick wood. The wood exerts a constant retardation (negative acceleration) of magnitude 8000 m/s2. How long will it take the bullet to come to a stop?
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