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An electric field exerts a force of 3.00 x 10 -4 N on a positive test charge of 7.50 x 10 -4 C. Find the magnitude of the field at the charge location.
Find the minimum aperture diameter of a camera that can resolve detail on the ground the size of a person (1.5m ) from an SR-71
The velocity of a boat with respect to the shore is 2 meters/second. The velocity of the water with respect to the shore is 1 meter/second. What is the distance traveled by boat after 3 minutes if the boat is traveling in the opposite direction of..
suppose a photon of wavelength 0.1A is absorbed by an n=1 electron in potassium(Z=19) and the electron is removed from the atom. find the velocity of the electron
A certain string just breaks when it is under 25 N of tension. A boy uses this spring to whirl a 0.75kg in a horizontal circle of radius 2.0m. At approximately what speed will the string break
A 170g baseball is pitched at 30m/s spinning at 53rad/s . You can treat the baseball as a uniform solid sphere of radius 4.5cm. What fraction of its kinetic energy is rotational
You are designing a spacecraft going to Mars. For the on-board electronics, you need a minimum amount of power in order to function properly. What is the efficiency of the solar cells
At a height of ten meters above the surface of a freshwater lake, a sound pulse is generated. How deep is the lake
A ball is thrown upward at 20 m/s from the top of a building, which is 100 meter high. Another ball is thrown downward from the top of the building at 15 m/s. What is their final speed when they hit the ground
A rod of length 5m with miss per unit length=x^1/2 extends in the x-direction. Find the mass and the center of mass of the rod
Jack and Jill ran up the hill at 3.3 m/s . The horizontal component of Jill's velocity vector was 2.0 m/s. What was the angle of the hill? Illustrate what was the vertical component of Jill's velocity?
You drive at 65 mi/h towards the east for 2 hours and then turn towards the north and drive at 56mi/h for 1 hour. find the average speed and average velocity
A floodlight with a mass of 46.00 kg is used to clarify the parking lot in front of a library. The floodlight is supported at the end of horizontal beam that is hinged to a vertical pole. A cable that makes an angle of 29 degrees with the beam is att..
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