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A +30 mC point charge sits at the center of a spherical thin metallic shell of 5.0 cm radius. The shell has a charge of -50mc.
A) at what distance from the center is the electric potential zero?
B) give V(r) for the entire space.
A 13000 kg railroad car travels alone on a level frictionless track with a constant speed of 17 m/s. A 6500 kg load, originally at rest, is dropped onto the car. What will be the car's new speed.
Water is flowing at 4.00 m/s in a horizontal pipe under a pressure of 225 kPa. The pipe narrows to half its original diameter. Assume laminar non-viscous flow. What is the pressure in the narrow section
A proton is moving parallel to a uniform electric field. The electric field accelerates the proton and increases its linear momentum to 3.00 10-23 kg·m/s from 1.30 10-23 kg·m/s in a time of 6.80 10-6 s. What is the magnitude of the electric field?
The inner surface is negative relative to the outer surface. Explain how much work is required to eject a positive sodium ion (Na+) from the interior of the cell?
a drawbridge with a weight of 5000 n is supported by a hinge and rope and is in static equilibrium. the length of the drawbridge, l, is 5 meters, what is the tension force the rope provides
A 6.0 V battery is connected to a wire made of three segments of different metals connected one after another, Find the potential difference across tungsten wire
q1. sphere pendulum has mass of 1.5 kg attached to a cord length of 11.5 m sphere is released from rest while cord
A charged particle moves through a velocity selector at a constant speed in a straight line, Calculate the charge-to-mass ratio of the particle.
The child then proceeds to walk toward the edge of the merry-go-round. Illustrate what is the angular speed of the system when the child reaches the edge?
Two forces, and act at a point. The magnitude of is 9.80, and its direction is an angle 57.0 above the x-axis in the second quadrant. The magnitude of is 6.2, and its direction is an angle 52.7 below the x-axis in third quadrant.
Assume a typical hummingbird has a lifespan of 4.0 years and an average heart rate of 1300 beats per minute. (a) Calculate the number of times a hummingbird's heart beats in its life, and express it in scientific notation.
An isolated conductor has net charge +10 x 10-6 C and a cavity with a point charge q = +3 x 10-6 C. What is the charge on the cavity wall and the outer surface
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