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Two straight wires run parallel to each other, each carrying a current in the direction shown below. The two wires experience a force in which direction? B) What happens when one of the currents is turned off?
A large boulder rests on a cliff 500 m above a small village in such a position that, if it should slide off, What is the final impact velocity of the boulder
Estimate the position of C.G or fulcrum & the masses of persons on a 16 feett sea saw, under balanced condition.
An object of mass m attached to a spring of force constant k oscillates with simple harmonic motion. What is the object's velocity when its potential energy is 2/3 E
A glass window 0.45cm thick measures 80cm by 37cm. To compare the relative efficiency of air and glass as insulators, calculate the heat flows through this window
A proton moves perpendicular to a uniform magnetic field at a speed of 1.90 107 m/s and experiences an acceleration of 2.90 1013 m/s2 in the positive x-direction when its velocity is in the positive z-direction. Determine the magnitude and direction ..
A beam of blue light of wavelength 500 nm has an intensity of 170 W/m^2, How many photoelectrons are emitted from the potassium plate per second
A thin double convex lens is to focus the image of an object onto a screen so that the image is life-sized. What is the total distance L between object and image
suppose that the gold ions carry one elementary unit of positive charge.
A spacecraft orbits an unknown planet at a distance of 5.2 x 10^7 m from its center. The period of its orbit is 52 hours. What is the mass of the planet
A 290 g piece of iron at 180 oC is placed in a 95 g aluminum calorimeter cup containing 250 g of glycerin at 10 oC. What is the specific heat of glycerin
As a space craft approaches a planet, the rocket engines on it are fired to slow it down so it will go into orbit around the planet. how long must the engines be fired
A 100-? resistor, an inductor and a 3.0-µF capacitor are connected in series with a time varying emf of 10.0 V and frequency 1000 Hz. What is the inductance of the inductor
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