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Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occuring electrons is removed. The radius of the orbit is 4.41 × 10-11 m. Determine the magnitude..
A diving board oscillates with simple harmonic motion of frequency 3.36 cycles per second, What is the maximum amplitude with which the end of the board can vibrate in order that the pebble placed there not lose contact with the board during oscillat..
Two equally charged insulating balls each weigh 0.14 g and hang from a common point by identical threads 30 cm long. The balls repel each other so that the separation between their centers is 6.4 cm. What is the magnitude of the charge on each bal..
A 1x10^2-kg crate is being pushed across a horizontal floor by a force that makes an angle of 30.0° below the horizontal. The coefficient of kinetic friction is 0.25. What must be the magnitude of, so that the net work completed by it and the kine..
What is magnitude of the unknown force
In a non-uniform gas, the equation of state is valid locally, as long as the density does not change too rapidly with position. Consider a column of ideal gas under gravity at constant temperature. Find the density as a function of height, by bala..
a 600 ton Boeing business jet is flying at 500 mph at a constant altitude of 35,00 ft. if the jet is holding passengers as cargo amounting to a weight of 37 tons, what is the lifting force acting on the jet provided by the air?
A parallel-plate capacitor has an area of 2.0cm^2, and the plates are separated by 2mm.
What is the highest height reached by the rocket. what is its initial speed as it leaves the ground.
An object is found to have a weight in air of 500N. It is then tied to a string connected to a balance and immersed in water (density of water is 1000 kg/m3). The scale now reads 450 N. at last the object is immersed in oil and is found to have a ..
What is the (a) magnitude and (b) angle (measured relative to the positive direction of the x axis) of the asteroid's acceleration.
A hunter aims directly at a target (on the same level) 140 m away.
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