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The Earth produces an inwardly directed electric field of magnitude 150V/m near its surface. (a) If the potential of the Earth is chosen to be zero, what is the potential at infinity? (b) What is the potential of the Earth's surface relative to V=0 at r=∞? (Ignore the fact that positive charge in the ionosphere approximately cancels the Earth's net charge; how would this affect your answer?)
A parallel-plate capacitor is to be constructed by using, as a dielectric, rubber with a dielectric constant of 3.20 and a dielectric strength of 25.0MV/m. find the minimum area the plates of this capacitor can have
A car is moving at 9 m/s along a curve on a horizontal plane with radius of curvature 46 m. The acceleration of gravity is 9.8. Find the rotational frequency of the wheel
A rocket of mass 4.5 x10^5 kg is in flight. Its thrust is directed at an angle of 53° above the horizontal and has a magnitude of 6.80 x10^6 N. Find out the magnitude and direction of the rockets acceleration. Give the direction as an angle above ..
markings to indicate length are placed on a steel tape in a room that is at a temperature of 22degc. measurements are
A large circus ride has a centripetal acceleration at 6.0 m/s2. If the circular ride has a radius of 11.0 m, what is its velocity at the edge
A circular armature coil is used in a motor with a uniform magnetic field of 4.10 T. The coil has a diameter 60 cm, a resistance of 50 ?, how much current is flowing throught the motor
The tungsten filament of a certain 100 W light bulb radiates 2.50 W of light. (The other 97.5 W is carried away by convection and conduction.) The filament has surface area of 0.270 mm2 and an emissivity of 0.950. Find the filament's temperature. (Th..
A brick is initially 14.80 cm high and an aluminum can is initially 14.81 cm high. By how much must their temperatures be raised
Light of wavelength 480nm falls normally onfour slits. Each slit is 2μm wide and isseperated from the next slit by 6μm. find the angles of any bright interference maxima that lie inside the central diffraction maximum
A 26.2-kg dog is running northward at 2.21m/s, while a 5.30-kg cat is running eastward at 2.83 m/s. Their 67.2-kg owner has the similar momentum as the two pets taken together. Find the magnitude and direction of the owner's velocity.
The coefficient of kinetic friction for a 22 kg bobsled on a trackis 0.25. What force is required to push it down a 6.0° incline and achieve a speed of 68 km/h at the end of 75 m
A vertical scale on a spring balance reads from 0 to 160N . The scale has a length of 11.5cm from the 0 to 160N reading. what is the mass m of the fish
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