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The electric field at 0.50 m away from the center of a thin metallic spherical shell of radius 0.30 m is - 400×10^3 V/m. If a point charge q = -13.0 µC is located at the center of the sphere, the charge density at the outer surface of the sphere is:
The air inside a bicycle tire pump has 206 joules of work done on it as 78.6 joules of heat is conducted away from it
Imagine two 5.0 g bags of protons, one at the earth's north pole and the other at the south pole. Calculate the electrical repulsion
A planet's moon travels in an approximately circular orbit of radius 6.6 x10^7 m with a time of 7 h 9 min. Calculate the mass of the planet from this information.
In a mass spectrometer, a singly, negative charged ion having a particular velocity selected by using a magnetic field of .10 T perpendicular to an electric field of 1000 V/m. What is the mass of the ion
A certain light source is found to emit radiation whose peak value has a frequency of 1.83E+15 Hz. Calculate the temperature of the source
A bat emits short pulses of sound at a frequency of 1.60×105 Hz. As the bat swoops toward a flat wall at speed 30.0 m/s, What is the frequency of sound incident on the wall
We drop a 26-g ice cube (0C) into 1000 g of water (20C). Find the total change of entropy of the ice and water when a common temperature has been reached
An ancient club is found that contains 120.00 g of pure carbon and has an activity of 7 decays per second. Determine its age assuming that in living trees the ratio of 14C/12C atoms is about 1.10x10-12. Note that half life of carbon-14 is 5700 yea..
A box of mass 12 kg moving on horizontal table. A wrench applies a constant force of 45.0 N that makes 37 degrees above the horizontal. what force do you need to apply to maintain that limit
A rod is 0.5100 m long at 25C. At 225C the rod is loaded with a stress of 2 76 MPa and its length is found to be 0.5358 m, calculate the coefficient of thermal expansion for this material
A perscription for a corrective lens calls for +1.5 D. The lensmaker grinds the lens from a "blank" with n=1.55, What should be the radius of curvature of the other surface
A charge of +q is situated at the origin, while an identical charge is located on the x axis at x = 0.58 m. A third charge of +4q is located on x axis at such a place that the net electrostatic force on the charge at origin triples.
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