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Would you rather live downwind of a nuclear power plant or of a coal-burning power plant? In addition to high-level nuclear wastes, there are intermediate and low-level nuclear wastes. What are some sources of these?
At Green Hills golf course, the ninth hole par 3 isfrom an elevated tee box. With a laser rangefinder, a golfermeasures the flag to be 143 m 18.5 degrees below thehorizontal.
Consider a 10-kg block resting on a frictionless plane inclined 30 o connected by a rope through a pulley to a 10-kg block hanging free. What is the direction and magnitude of the resulting acceleration of the 2-block system?
One side of a plane wall is maintained at 100 ºC, while the other side is exposed to a convection environment having T = 10 ºC and h = 10 W/m2 -ºC. The wall has k = 1.6 W/m-ºC and is 40 cm thick. Calculate the heat-transfer rate through the wall
Two positive point charges are a fixed distance apart. the sume of their charges is Qt. what charge must each have in order to a) mazimize the electric force between them, and b) minimize it?
A 47% efficient device uses chemical energy to generate 550J of electric energy. How much chemical energy is used
In 1965, Arno Penzias and Robert Wilson discovered the cosmic microwave radiation left over from the Big Bang expansion of the Universe. Suppose the energy density of this background radiation is 3.7 10-14 J/m3. Determine the corresponding electric f..
A 0.430 kg block is attached to a horizontal spring that is at its equilibrium lenght, and whose force constant is 20.0 N/m. The block rest on a frictionless surface. A 0.0500 kg wad of putty is thrown horizontally at the block, hitting it with a ..
A uniform electric field of magnitude 324 N/C is directed along the +y-axis. A 5.90 µC charge moves from the origin to the point (x, y) = (-20 cm, -35 cm). What is the change in the potential energy associated with this charge?
Of the charge Q initially on a tiny sphere, a portion q is to be transferred to a second, For what value of q/Q>0.5 will the electrostatic force between the two parts have 1/2 of the maximum possible value
Electric forces among two charged objects tend to be much stronger in magnitude than the attractive gravitational force between them. Two particles of masses 7.93 kg and 8.97 kg and charges 2.56 char16.png C and -4.01 char16.png C respectively are se..
How close would two stationary electrons have to be positioned so that their total mass is 4 times what it is when the electrons are very far apart?
When an object is located very far away from a convex mirror, the image of the object is 14.0 cm behind the mirror. Using a ray diagram drawn to scale, decide where the image is located when the object is placed 2.3 cm in front of the mirror.
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