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Negative charge -Q is distributed uniformly around a quarter-circle of radius a lies in the first quadrant with a center of curvature at the origin. Discover the x- and y- components of the net electric field at the origin.
An astronaut (mass of 100 kg, with equipment) is headed back to her space station at a speed of 0.750 m/s but at the wrong angle. What is her new direction (relative to the initial direction)
We can reasonably model a 90-W incandescent light bulb as a sphere 7.0 centimeter in diameter. Find the visible light intensity at surface of bulb
In the two-slit experiment, the distance between the slits and the screen is 1.1 m and the distance between the slits is 0.040 mm. what is the distance between the adjacent bright fringes
The spaceship Enterprise 1 is moving directly away from earth at a velocity that an earth-based observer measures to be +0.62c. A sister ship, Enterprise 2, is ahead of Enterprise 1 and is also moving directly away from earth along the same line. ..
In an amusement park ride, cars are suspended from L = 4.20 m cables attached to rotating arms at a distance of D = 6.06 m from the axis of rotation. What is the angular speed of rotation
Suppose you have an electric hot water heater for your house which is an aluminum cylinder which has a 0.46 m radius and is 2 m high. How much energy is lost through the walls of the hot water heater
For the transmutation reaction 1H + 93Y -> ___ + 4He, What is the element abbreviation of the daughter atom
A 2.0 kg cart has a spring with spring constant k =5000 N/m attached to its front, parallel to the ground. What is the speed of each cart after the collision
A stick with a mass of 0.214 kilogram and a length of 0.436 meter rests in contact with a bowling ball and a rough floor. Evaluate the magnitude of the force exerted on the stick by the bowling ball
A Carnot engine absorbs 950J of heat each cycle and provides 340J of work. How much heat is rejected each cycle
A 0.45-kg crow lands on a slender branch and bobs up and down with a period of 1.1 s. An eagle flies up to the same branch, scaring the crow away and lands.
a river flows due east at 3.0 ms. a boat crosses the 300 m-wide river by maintaining a constant velocity of 10 ms due
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