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An electron confined in a one- dimensional box is observed, at different times, to have energies of 12eV, 27eV, and 48eV. What is the minimal length of the box?
The activation energy for vacancies in Cu is w.28 eV. Find the fractional number of vacancies at the melting temperature. Estimate the contribution of vacancies to the thermal expansion at the melting temperature.
A 160-N sphere 0.20 m in radius rolls without slipping 6.0 m down a ramp that is inclined at 25° with the horizontal. What is the angular speed of the sphere at the bottom of the slope if it starts from rest? ________rad/s
An orange crate which has a mass of 45.0 kg sitting at rest ona frictionless surface is acted on by a 14.5 Newton net force for6.0 seconds. What is the speed of the box at the end of the 6.0seconds?
A 8.0 cm diameter solenoid is wound with 2000 turns/m. What is the maximum strength of the induced electric field inside the solenoid
The athlete shown in the figure rotates a 1.00 kg discus along a circular path of radius 1.07 m. find the magnitude of the maximum radial acceleration of the discus
For the neutral chlorine atom 35,17 CL, determine the mass number and number of protons
If the spring is pulled until it stretches 2.40cm and the pack remains at rest, what is the force of friction exerted on the backpack by the table
A 56 kg student runs at 5.0 m/s, grabs a hanging rope, and swings out over a lake, What is the maximum tension in the rope?
A boat in a storm is subject to a force of 1750 N at 0.00 degrees and 1640 N at 145 degrees. How much of a third force and in what direction must be exerted to make the net force zero
Suppose that the force exerted by the heart on the blood entering the aorta is 3.25N and the surface area of the aorta is 3.15cm square. Calculate the pressure of the blood in the aorta
alpha particles of energy 9.4 mev are incident on a silverfoil of thickness 6.8m. for a certain value of the impact
Two people are carrying a uniform wooden board that is 3.00 m long and weighs 160 N. If one person applies an upward force equivalent to 60 N at one end, at what point does the other person lift . If the tangential acceleration of a yo-yo at the en..
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