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A copper penny has a mass of 3.1 g. Being electrically neutral it contains equal amounts of positive and negative electricity.
a. What is the magnitude of these charges?
b. The current (charge/time) in a 100 W, 110 V light bulb is 0.91 A. How long would it take for the charge equivalent to that in a penny to pass through the bulb?
Assume that light of wavelength 550 nm is being observed. Also suppose that diffraction effects, rather than atmospheric turbulence, limit the resolving power of the telescope. Find the greatest distance that these stars might be from the earth.
An automobile and a truck start from rest at the same instant, with the automobile initially at some distance behind the truck, What is the speed of the truck when they are abreast, How far was the automobile behind the truck initially
A piano string with mass density 7700 kg/m3 and diameter 0.3 mm is stretched over a pulley such that its vibrating length is 45 cm. A hanging mass of 35 kg is attached to the end of the string that passes over the pulley.
An orangutan throws a coconut verticallyupward at the foot of a small cliff 40m high while his matesimultaneously drops another coconut from the top of the cliff. Thetwo coconuts collide at an altitude of 20m.
The intensity of electromagnetic waves from the sun is 1.4kW/m2 just above the earth's atmosphere. How many Joules of solar energy fall on your back as you work on your tan for 1.1hr
A converging lens with focal length of 6.0cm is placed 8.0 cm to the right of a diverging lens of focal length of -4.0 cm. A .4 cm tall object is placed 4.0 cm in front of the diverging lens
A 350kg piano slides 3.8m down a 33^\circ incline and is kept from accelerating by a man who is pushing back on it parallel to the incline (see the figure(Figure 1) ). The effective coefficient of kinetic friction is 0.35.
A ball is thrown straight upwith an initial velocity v0=4.9 m/s. Assume that the acceleration due to gravity is g=9.8 m/s^2 downward. How long does it take to come back to its inital position
Consider a particle in the ground state of the harmonic oscillator. Obtain the wavefunction in momentum space. Calculate the probability of ending the particle between x = 0 and x = 2*(2h/(m?))^1/2 in two ways: using the real space wavefunction and ..
An insect 3.75 mm tall is placed 20.0 cm to the left of a thin planoconvex lens. Calculate the location of the image this lens forms of the insect
A playground merry-go-round of radius R = 1.20 m has a moment of inertia I = 265 kg · m2, What is the new angular speed of the merry-go-round
a projectile is launched at speed vo from the foot of an incline that makes angle theta22.0 degrees relative to the
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