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Consider two isolated, charged conducting spheres: a large sphere and a second smaller sphere with a radius 8 times smaller than that of the large sphere, but with 4 times as much charge. (a) Calculate the ratio of the electric potential at the surface of the large sphere to that of the small sphere. (b) Calculate the ratio of the magnitudes of the electric fields at the surface of the large sphere to that of the small sphere.
How many kilocalories of heat are produced when the brakes are used to bring a 930 kg car to rest from a speed of 102 km/h.
How to find out an initial speed of the bullet
A flight attendant pulls her 63N flight bag a distance of 312m along a level airport floor at a constant velocity. The force she exerts is 39N at the angle of 59° above the horizontal.
A jetliner is moving at a speed of 274 m/s. The vertical component of the plane's velocity is 54.0 m/s. Conclude the magnitude of the horizontal component of plane's velocity.
The G string of a guitar which should be 397 Hz is playing flat at 380 Hz. What percentage change in the tension of the wire is necessary so as to tune the string to 392 Hz.
An insulated Thermos contains 138cm3 of hot coffee at 95 °C. You put a 12g ice cube at its melting point to cool the coffee. By how numerous degrees has your coffee cooled once the ice has melted and equilibrium is reached.
Four solid plastic cylinders all have radius 2.75 cm and length 6.42 cm. Find the charge of each cylinder given the following additional information about each one.
while the airport sends out a rescue crew, how far will the crew have to fly to reach the aircraft if they fly in a straight line from Galisto?
A 21 kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 80.5 N and is directed at an angle of 30° above the horizontal. Determine the coefficient of kinetic friction.
A 3.60-{rm m}-long, 430 {rm kg} steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 66.0 {rm kg} construction worker stands at the far end of the beam. What is the magnitude..
With the rod initially horizontal, a 44 gm wad of wet putty drops onto one of the balls with a speed of 3.7 m/sec and sticks to it.
A skier moving at 4.50 m/s encounters a long, rough horizontal patch of snow having coefficient of kinetic friction 0.230 with her skis. How far does she travel on this patch before stopping.
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