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Consider an isolated metallic sphere of radius R and another isolated metallic sphere of radius 3R. If both spheres are at the same potential, what is the ratio of their charges? If both spheres carry the same charge, what is the ratio of their potentials?
An atomic spectrum contains a line with a wavelength centered at 450nm, Estimate the lifetime of the excited state
Light is emitted from an ordinary lightbulb filament in wave-train bursts about 10 ^ -8 s in duration. What is the length in space of such wave trains
When placed in a fluid with an unknown density, a sphere with a radius of 8.50 cm floats with 2/3 of its volume submerged. What is the density of the fluid
An airplane must reach a speed of 186mi/h to take off. If the runway is 488m long, what is the minimum value of acceleration that will allow the airplane to take off successfully.
question1the distance between an object and its image is fixed at 40.0 cm. a converging lens of focal length f 6.53 cm
A 55 kg woman cheats on her diet and eats a 602 Calorie (602 kcal) jelly donut for breakfast. If the human body is only 25% efficient in converting chemical energy to mechanical energy, how many stairs must the woman climb to work off her breakfas..
Explain the concepts behind the gravitational constant, gc. Define the constant mathematically.
A 3.0 m tall, 60 cm diameter concrete column supports a 205,000 kg load. By how much is the column compressed
An 81 kg person puts on a life jacket, jumps into the water, and floats. The jacket has a volume of 3.1 x 10-2 m3, What is the density of the life jacket
A heavy piece of hanging sculpture is suspended by a 90 cm-long, 5.0 g steel wire. When the wind blows hard, What is the mass of the sculpture
A bronze cannon ball with a mass of 3.5 kg is fired vertically from a small cannon and reaches a height of 25.0 m. find the maximum height reached by the cannon ball
A charge of -2.87 ?C is fixed in place. From a horizontal distance of 0.0470 m, a particle of mass 7.43 x 10-3 kg and charge -9.14 ?C is fired with an initial speed of 60.0 m/s, How far does the particle travel before its speed is zero
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