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A student walks 15 m east and then turns and walks 20 m north in a total time of 10 sec. Find the magnitude of the student's average velocity in meter per second?
The Sun has an apparent magnitude of -26.8 and absolute magnitude of 4.8 Calculate the apparent magnitude it would have at the distance of αCentauri (1.3 pc).
The Gravitron single-car roller coaster consists of a singleloop-the-loop. The car is initially pushed, giving it just theright mechanical energy so the riders on the coaster will feel"weightless" when they pass through the top of the circular arc..
Objects A and B are both positively charged. Both have a mass of 138 g, but A has twice the charge of B. How large is the electric force (in N) on A
A parallel-plate vacuum capacitor has 6.36 J of energy stored in it. The separation betweenthe plates is 2.20 mm. If the separation is decreased to1.85 mm,
A possible means for making an airplane invisible to radar is to coat the plane with an antireflective polymer. how thick would you make the coating
An explorer is caught in a whiteout (in which the snowfall is so thick that the ground cannot be distinguished from the sky) while returning to base camp. How far (in km) must he now travel to reach base camp
lake erie contains roughly 4.00 x 1011 m3 of water.a how much energy is required to raise the temperature of that
A gas expands from I to F. The energy added to the gas by heat is 423 J when the gas goes from I to F along the diagonal path.
A circular curve of highway is designed for traffic moving at 55 km/h. If the radius of the curve is 120 m, what is the correct angle of banking of the road
Jupiter has the strongest magnetic field in our solar system, about 14 at its poles. Approximating the field as that of a dipole, find Jupiter's magnetic dipole moment
A small conductive rod of length 1.4 m moves with a constant velocity v=20 m/s in a direction parallel to a long wire carrying a current of 32 A. Calculate the electric potential induced across the rod
Human tissue contains about 3·1027 electrons perkg of material. Suppose two humans are located 1960 km apart andeach has a mass of 60 kg. What will be the magnitude of the resulting force in N
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