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On a clear day the electric field in the atmosphere near the earth's surface is 100 N/C, directed vertically downward.
(a) If we adopt the convention that the potential at the earth's surface is 0, what is the potential 297 m above the surface?
(b) What is the potential at the top of Pike's Peak, 14,110 ft above sea level? (Hint: Do not assume that the surface in part (a) is at sea level.)
A "sun yacht" is a spacecraft with a large sail that is pushed by sunlight. Although such a push is tiny in everyday circumstances, What is the magnitude of the resulting acceleration, If the craft starts from rest
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Two sounds differ in intensity level by 4.62 dB. What is the ratio of the intensities of these two sounds? (Let I1 be the intensity of the first (higher) sound and I2 be the intensity of the second (lower) sound.)
The density of ma ial at the center of a neutron star is approximately 1.00 x 10^18 kg/m^3. Calculate the mass of a cube
A person fishing from a pier observes that five wave crests pass by in 7.4 s and estimates the distance between two successive crests to be 4.3 m. The timing starts with the first crest and ends with the fifth. What is the speed of the wave? m/s
A high-voltage transmission line with a resistance of 0.335 ?/km carries a current of 1.45 kA, What fraction of the transmitted power does this loss represent
A small light has a 1.0 V, 4.8 W bulb that is powered by a transformer concocted to a 120 V dc power source. How many turns does the primary coil have
A uniform plank of length 5.5 m and weight 205 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support .To what distance x can a person who weighs 447-N walk on the overhanging part of the plank before it just ..
A wave has angular frequency 140 rad/s and wavelength 1.60 m. Calculate the angular wave number
A cannon tilted up at a 25 degree angle fires a cannon ball at 81.0m/s from atop a 18.0m -high fortress wall
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