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A 11.9-g mass is suspended 1.47 cm above a nonconducting flat plate, directly above an embedded charge of q.
a) If the mass has the same charge, q, how much must q be so that the mass levitates (just floats, neither rising nor falling)?
b) If the charge q is produced by adding electrons to the mass, by how much will the mass be changed?
A system consists of N particles that can occupy two energy levels: a nondegenerate ground state and a three-fold degenerate excited state, find the number of particles in the ground state and in the excited state
a double slit is illuminated with 656.3 nm light the screen is located 80 cm from the slits, calculate the fraction of the maximum intensity 0.6 cm from the central maximum
Suppose you need to rotate the plane of polarization of a plane-polarized beam of light by 90 degrees and produce only a 10% loss in intensity, Find the angle between the successive polarizers
Spaceman Spiff sits just outside the Milky Way galaxy with a cup of liquid Helium which is at approximately 4K (-269 degrees C). what is the latent heat of vaporization of liquid Helium
At what angle is the curve banked? The acceleration due to gravity is 9.8 m/s2.
Describe, in general terms, how we may be able, through some simple experiments, determine the mass of the Earth
You want to shoot a 19cm long arrow parallel to this axle and through the wheel without hitting any of spokes. Suppose that the arrow and the spokes are very thin.
One mole of an ideal gas does 2 600 J of work on its surroundings as it expands isothermally to a final pressure of 1.00 atm, Determine the initial volume of the gas
A man leaps from the top of a 60 meter tall building. If his initial speed is 24 m/s and at an angle of 23 degrees above the horizontal, then with what speed does he hit the ground as he lands
question1a hunter wishes to cross a river that is 1.4 km wide and that flows with a speed of 7 kmh. the hunter uses a
a parallel-plate capacitor in air has a plate separation ofnbsp1.43nbspcm and a plate area of 25.0 cm2. the plates are
A victorious 92 kg hockey player moving initially at a spped of 3.2 m/s skates by the trophy table, How heavy is the cup
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