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A river with long, straight, parallel sides 10 km a part flows from north to south at 3 m/s. A swimmer enters the river on the east side and swims due west (i.e., his head is always pointing west) at 2 m/s. How far downstream is the swimmer when he reaches the opposite shore? Explain your answer in detail.
A satellite in Earth orbit has a mass of 102 kg and is at an altitude of 2.10 106 m. (Assume that U = 0 as r ? ?.), What is the potential energy of the satellite-Earth system
An electromagnetic doorbell has been constructed by wrapping 66 turns of wire around a long, thin rod, What is the magnitude of the angular velocity of the rod
analysis of covariance. using your area of interest identify one independent and two dependent variables such that the
A diffraction grating with 1000 slits/cm is oriented parallel o the y-axis and its center is located on the x-axis at x = -5.00 m. At how many locations does constructive interference occur on the y-axis
A spring has a force constant of 323 N/m and an unstretched length of 6 cm. One end is attached to a post that is free to rotate in the center of a smooth table, as shown in the top view below. The other end is attached to a 4-kg disk moving in un..
an air-conditioner with refrigerant r-134a as the working fluid is used to keep the room at 23c by rejecting waste heat
Sheena can row a boat at 2.95 mi/h in still water. She needs to cross a river that is 1.17 mi wide with a current flowing at 1.79 mi/h. Not having her calculator ready, she guesses that to go straight across, she should head 60.0° upstream.
he femur is a bone in the leg whose minimum cross-sectional area is about 3.1 x 10-4 m2. Find the maximum stress that this bone can withstand
Let us use the uncertainty principle to (very roughly) estimate the size of a hydro- gen atom. Picture the hydrogen atom as an electron orbiting a proton at close to the speed of light.
A vessel whose walls are thermally insulated contains 2.00 of water and 0.550 of ice, all at a temperature of 0.0. The outlet of a tube leading from a boiler in which water is boiling at atmospheric pressure is inserted into the water.
An oil rig in the gulf is held at its designated drilling location by 3 tugboats. tugboat A oulls with 42000 N straight in the east direction, find the magnitude of the tension of the ropes attached to tugboats B and C
Consider a series RLC circuit with R = 15 , L = 190 mH, C = 75 µF, and a maximum voltage of 142 V. What is the impedance of the circuit at resonance
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