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Question: A penny is placed at the outer edge of a disk (radius = 0.147 m) that rotates about an axis perpendicular to the plane of the disk at its center. The period of the rotation is 1.70 s. Find the minimum coefficient of friction necessary to allow the penny to rotate along with the disk.
To recharge a 10 V battery, a battery charger must move 3.7 105 C of charge from the negative terminal to the positive terminal. How much work is done by the charger
an alien pilot of an intergalactic spaceship on a mission to measure the sizes of galaxies is traveling at 0.86c
Light strikes a sodium surface, causing photoelectric emission. The stopping potential for the ejected electrons is 3.2 V, What is the wavelength of the incident light
A nylon guitar string has a linear density of 5.56 g/m and is under a tension of 161 N. The fixed supports are D = 74.4 cm apart. The string is oscillating in the standing wave pattern shown in the figure. Calculate the (a) speed, (b) wavelength, and..
A copper wire has a square cross section a on a side. The wire is L long and carries a current of I. The density of free electrons is ne. Estimate the magnitude of the electric field in the wire
When monochromatic light shines perpendicularly on a soap film (n = 1.33) with air on each side, Obtain the vacuum wavelength of the light
Flux and nonconducting shells. A charged particle issuspended at the center of two concentric spherical shells that arevery thin and made of nonconducting material. Figure (a) belowshows a cross section. Figure (b) below gives the netflux Φ throug..
A large container, open at the top, is half-filled with water (?H2O = 1000 kg/m3). Determine the fractions of the cube immersed in water and oil
Consider an elastic collision in one dimension that involvesobjects of mass 2.5kg and 4.5kg. The larger mass is initially atrest, and the smaller one has an initial velocity of 12 m/s
problem1.the mass attenuation coefficient for concrete density r 2.35 gcm3 for 600 kev photons is 0.08 cm2g.a what is
It is determined by immersing a crown in water that its volume is 26inc^3=4.2x10^-4m^3. What would its weight be if it were made of pure gold
A certain type of laser emits light that has a frequency of 4.9 × 1014 Hz. How many wavelengths are there in one pulse
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