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We have a hollow metallic sphere with charge -5.0 µC and radius 5.0 cm. We insert a +10-µC charge at the center of the sphere through a hole in the surface. What charge now rests on the outer surface of the sphere?
Over a time interval of 2.16 years, the velocity of a planet orbiting a distant star reverses direction, Find the total change in the planet's velocity in m/s
The allowed energies of a simple atom are 0.0 eV, 4.5 eV, and 7.0 eV. What is the minimum speed the electron could have after the collision
A hypodermic syringe contains a medicine with the density of water. The barrel of the syringe has a cross-sectional area of 2.5 x10-5 m2.
A uniform rod of mass 3.05×10?2kg and length 0.450m rotates in a horizontal plane about a fixed axis through its center and perpendicular to the rod. What is the angular speed of the rod after the rings leave it?
mars has a mass of about 6.4x10^23 kg, and its moon Phobos has a mass of about 9.6x10^15 kg. how far apart are mars and Phobos
an improved version of a model of radioactive is to toss a large number of dice instead of coins: each has die that comes up a "one" represent a nucleus that has decayed. what is the half-life in numbers of tosses
Suppose two identical spheres are insulated: sphere A carries +3.54Q and sphere B carries -20.2Q, What is the charge on sphere A now
The index of refraction of rock salt is about 1.52. What is the speed of light in rock salt
A fish is able to jump vertically out of the water with a speed of 4.76 m/s. What is the speed of the fish
A. 0.145 kg baseball is pitched at 42 m/s. The batter hits it horizontally to the pitcher at 58 m/s. What is the change in momentum of the ball
If 22.0g of the metal gallium melts in your hand, what is the change in entropy of the gallium in this process? What about the change in entropy of your hand
A thin, uniform rod is hinged at its midpoint. To begin with, one half of the rod is bent upward and is perpendicular to the other half. What is the angular velocity of the straight rod
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