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The earth has a vertical electric field at the surface, pointing down, that averages 120 N/C. This field is maintained by various atmospheric processes, including lightning. What is the excess charge on the surface of the earth?
In one design, the large spring with spring constant 2.0×10^4 was placed behind the cannon. The other end of the spring braced against a post that was firmly anchored to the ship's frame.
What fraction of the power radiated by the sun is intercepted by the planet Mercury? The radius of Mercury is 2.44 x 106 m, and its distance from the sun at the moment is 5.75 x 1010 m. presume that sun radiates uniformly in all directions.
The donor paid gift tax of $14,000 on the transfer. If Laura later sells the property for $110,000, illustrate what is her recognized gain or loss?
A projectile is fired at v0 = 407.0 m/s at an angle of ? = 72.0o with respect to the horizontal. How far will the projectile travel in the horizontal direction
The electron and proton of a hydrogen atom are separated (on the average) by a distance of approximately 5.3 x 10-11 m, what is a fundamental difference between the two forces
The temperatures indoors and outdoors are 297 and 311 K, respectively. A Carnot air conditioner deposits 6.22 105 J of heat outdoors. How much heat is removed from the house?
A bix of mass 90 kg is sitting on the floor. The tension in the rope is 56.0N, Calculate the accleration on the box
what is the lumberjack's speed relative to the shore? Neglect friction between the log and the water.
A man pushes a box with a constant horizontal force. The mass of the box is 150 kg, the coefficient of kinetic friction between the box and the floor is 0.25, Find the work done by the man
A chimp jumps up from a trampoline and lands on the ground, 1.2 meters below. the total time taken was .095 secons. what is the maximum height above the ground
Calculate charges, current, potential difference.
When blue light with a wavelength of 471nmilluminates a diffraction grating, What is the maximum spacing between lines on this grating
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