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A boy coasts down a hill on a sled, reaching a level surface at the bottom with a speed of 6.9 m/s. If the coefficient of friction between the sled's runners and snow is 0.045 and the boy and sled together weigh 580 N, how far does the sled travel on the level surface before coming to rest?
A 1200-kg car carrying four 88 kg people travels over a "washboard" dirt road with corrugations 4.3 m apart. The car bounces with highest amplitude while its speed is 13 km/h. While the car stops, and people get out, by how much does the car body ..
You push with a horizontal force of 50.0N against a 24.0N box, pressing it against a rough wall to hold it in place. what is the friction force of the box
Elements that appear in the same column of the periodic table often share similar chemical properties. In the case of the alkaline earth metals, this is troublesome since the body treats calcium, calculate the path radius of the Ca ion
A film of oil with refractive index 1.45 floats on water with refractive index of 1.33. Determine the thickness of the oil film
The four tires of an automobile are inflated to a gauge pressure of 2.10E+5 Pa. Each tire has an area of 0.0267 m2 in contact with the ground. Find out the weight of the automobile.
Why is the human body not an equipotential surface? What is the function of a cell membrane in this respect and what electrical device does it behave like?
A sound wave traveling at 341m/s is emitted by foghorn of a tugboat. An echo is heard 3.30s later.
95.8 kg of ice is melted into water then raised to a temperture of 325.8 K. How much energy is needed to complete this process?
A series RC circuit with C = 56?F and R = 6.4? has a 25V source in it. With the capacitor initially uncharged, an open switch in the circuit is closed, What is the voltage across the resistor immediately afterward
A 15 pF capacitor is charged to 1 kV and then removed from the battery and connected in parallel to an uncharged 65 pF capacitor, Find the change in energy
You place one end of the pole on a fence post and hold the other end of the pole 35 from its tip. Explain how much force must you exert to keep the pole motionless in a horizontal position?
A mass of 1.7kg stretches a vertical spring 0.313 m. If the spring is stretched an additional 0.13m and released, how long does it take to reach (new) equilibrium position again.
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