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A spherical shell with an inner radius of 10 cm and outer radius of 12 cm contains a net charge +10uc. At the center of the shell is located a point charge with a charge of +2uc. What is the strength of the electric field at a distance of 8cm from the center of the shell?
What minimum constant acceleration does this need if the aircraft is to be airborne after a takeoff run of 250 m.
It is known that the electric force of repulsion between two electrons is much stronger than the gravitational attraction. For two electrons at a distance d apart, calculate the ratio of the size of the electrostatic repulsion to that of the gravi..
An air conditioner draws 14 A at 220-V ac. The connecting cord is copper wire with a diameter of 1.758 mm. how much power does the air conditioner draw
A feather is dropped on the moon from a height of 1.40 meters. find the time for the feather to fall to the surface of the moon
The temperature of 2.5 mol of helium (a monatomic gas) islowered by 35 K under conditions of constant volume. how much heat is removed from the gas
The distance between Earth and its moon is 3.84 x 10^8 meters. Earth's mass is m= 5.9742 X 10^24 kg and the mass of the moon is 7.36 x 10^22 kg. What is the force between Earth and the moon?
Two strings are adjusted to vibrate at exactly 188 Hz. Then the tension in one string is increased slightly. What is the new frequency of the string
In an emergency, you need to run a radio that uses 39.3 W of power when attached to a 16.0 V power supply, how many series resistors should you use
A billiard ball moving at 1.5 m/s in the x direction collides with an identical ball initially at rest. after the collison one ball moves off at 45 degrees above the x axis. find both balls post collision velocities
A piece of metal with a mass of 3.8 kg and density of 1808 kg/m3 is suspended from a string and then completely immersed in a container of water. Determine the volume of the piece of metal
An airplane with a speed of 77.1 m/s is climbing upward at an angle of 70.4 ° with respect to the horizontal. When the plane's altitude is 861 m, Calculate the distance along the ground
In the railroad freight yard, an empty freight car of massmrolls along a straight level track at1.0m/s and collides with an initially stationary, What is the speed of the two cars after the collision
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