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How would you work the problem if the net electric field produced at the center of the circle made an angle of 29.3 degrees with the vertical axis, measured counte rclockwise.
When you walk past an open door of a room in your house in which a person is speaking, you can hear the person long before you can see him. Why? What does this tell you about the wavelengths of light and sound?
A 34cm diameter wheel accelerates uniformly about its center from 130rpm to 370rpm in 4.8s. Determine the tangential component of the linear acceleration of a point on the edge of the wheel 1.6s
Water leaks out of a dam through a small hole 4.2 m below the level of the water behind the dam. Find the speed of the water emerging from the hole
A spring with k=620 N/M is stretched with a tension of 40 N. What is the potential energy of the stretched spring
A block of mass m = 4.43 kg is attached to a spring which is resting on a horizontal frictionless table. What is the maximum speed of the block
A person eats a dessert that contains 230 kcal. The skin temperature of this individual is 36° C and that of her environment is 21° C. The emissivity of her skin is 0.85 and its surface area is 1.3 m2. How much time would it take for her to emit the ..
It was a dark and storym night, when suddenly you saw a flashof lightning Three-and-a-half seconds later you heard the thunder. Given that the speed of sound in air is about 340 m/s, how far away was the lightning bolt?
A piano string having a mass per unit length equal to 4.00 × 10-3 kg/m is under a tension of 1100 N. Find the speed with which a wave travels on this string.
The cord is then pulled from below, shortening the radius of the circle in which the block revolves to 0.10 . At this new distance, the speed of the block is observed to be 3.50. Explain by how much work was done by the person who pulled on the cor..
A pump is used to empty a 4800 L. wading pool. The water exits the 3.0-cm-diameter hose at a speed of 2.0 m/s
absorberdensity pnbspnbspattenuation coefficient mup cm2gmuhalf value layer hvl
Two soccer players start from rest, 47 m apart. They run directly toward each other, both players accelerating. How much time passes before the players collide
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