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Like a charged rubber balloon with an even surface charge density, a charged soap bubble experiences an outward electrical force on every bit of its surface. Given the total charge Q on a bubble of radius R , what is the magnitude of the resultant force tending to pull any hemispherical half of the bubble away from the other half?
Find the electric field inside the cylinder
A car takes a sharp turn on a road. Which of the following provides the centripetal force on the car? The weight of the car, frictional force, tangential acceleration, or gravitational force?
A generator uses a coil that has 210 turns and a 0.20-T magnetic field. The frequency of this generator is 60.0 Hz, and its emf has an rms value of 120 V. assume that each turn of the coil is a square (an approximation), conclude the length of wire f..
An inductor that has an inductance of 15.0 H and resistance of 30.0 W is connected across a 100-V battery. Calculate the rate of increase of the current
A fisherman accidentally steps off the ledge of a 4.0 meter-high dock and falls into the lake below the dock. what is the fisherman's speed on entering the water
Thus, to eliminate the difficulties with motion sickness, designers must choose the distance between the astronaut's feet and the axis about which the space station rotates to be greater than a certain least value. What is this least value.
A 2.16kg object attached to a spring moves without friction and is driven by an external force given by the expression F(t) = F0 sin(2Ï€t), find the period of the driven system when at resonance
A soccer player kicks the ball toward a goal that is 16.0 m in front of him, Find the speed of the ball when the goalie catches it in front of the net
An extension cord made of two wires of diameter 0.129cm (no. 16 copper wire) and of length 2.2m is connected to an electric heater which draws 17.0 A on a 120V- line, How much power is dissipated in the cord
A thin spherical shell has a radius of 4 m and a mass of 225 kg, and its center is located at the origin of a coordinate system. find the gravitational force of attraction between the two shells
You're driving down the highway late one night at 18 - {rm m}/{rm s} when a deer steps onto the road 45 -{rm m} in front of you. Your reaction time before stepping on the brakes is 0.50- {rm s}, and the maximum deceleration of your car is 11 {rm m..
Two objects of masses 10.0 kg and 5.00 kg are connected by a light string that passes over a frictionless pulley as in figure P4.20. The 5.00 kg object lies on a smooth incline of angle 40 degrees. Find out the acceleration of the 5.00 kg object ..
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