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A hollow metal sphere has 7cm and 11cm inner and outer radii, respectively. The surface charge density on the inside surface -250nC/m^2 . The surface charge density on the exterior surface is +250 nC/m^2. question (1) What is the strength of the electric field at point 4 cm from the center? question (2) What is the strength of the electric field at point 8 cm from the center?
while taking a ride in a hot-air balloon innapa valley francisco wonders how high he is. to find outhe chooses a
An inclined plane with friction, a massless/frictionless pulley, and two blocks, with m1 hanging and m2 resting on the plane. How do you find the acceleration
A 66 kg solid sphere with a 14 cm radius is suspended by a vertical wire. What is the period of the oscillations
We are not normally aware of the gravitational or electric force between two ordinary objects. What is the reason in each case? Give an example where we are aware of each one and why.
A laser used in a rock concert emits a red light with a wavelength of 721 nm. Calculate the frequency of the light
The loaded cab of an elevator has a mass of 3.0 x10^3 kg and moves 157m up the shaft in 23s at constant speed. At what average rate does force from the cable do work on the cab.
A spaceship and an asteroid are moving in the same direction away from Earth with speeds of 0.76c, What is the relative speed between the spaceship and the asteroid
A hydraulic lift is lifting a car that weighs 13 kN. The area of the piston supporting the car is A, How far must the small piston be pushed down to raise the car a distance of 1.3 cm
A rocket is fired at a speed of 75.0 m/s from ground level, at an angle of 60.0 degrees above the horizontal. The rocket is fired toward the ground 11.0-m high wall, which is located 27.0 m away. By how much does the rocket clear the top of the wa..
The nucleus of an atom has a radius of about 5.1×10-15 m. The electron is normally at a distance of about 6.2×10-11 m from the nucleus, Find the volume of the nucleus
A bicycle and its rider together has a mass of 78 kg. What power output of the rider is required to maintain a constant speed of 5.0 m/s (about 11.2 mph) up a 5.0% grade
The critical angle for total internal reflection for glycerine surrounded by air is 42.9°. Calculate the index of refraction of the substance
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