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An 6.60-cm-diameter, 370 g sphere is released from rest at the top of a 2.00-m-long, 19.0 deg incline. It rolls, without slipping, to the bottom. What is the sphere's angular velocity at the bottom of the incline? What fraction of its kinetic energy is rotational?
A proton accelerates from rest in a uniform electric field of 644 N/C. At some later time, its speed is 1.14 106 m/s. Find the magnitude of the acceleration of the proton
The astronaut pushes on the satellite, giving it a speed of 0.25 directly away from the shuttle. Seven-and-a-half seconds later the astronaut comes into contact with shuttle.
One piece of 50 g ice at 0C is added to m grams of water at 25C. The system is insulated from outside and the exchange of heat is limited to ice and water only. find the total change in entropy
find out the speed of the test charge. How many electrons should be removed from A and put onto B to make the electrostatic force that acts on each object an attractive force whose magnitude is 23.6 N.
George just graduated from college and is going on his first job interview. He has learned that there are two other candidates. Because of the information he has learned about the serial position effect, George asks to be either the first or the last..
The top of Mt. Everest is 8750 m above sea level. Assume that sea level is at an average Earth radius of 6.38×10^6 m. What is the magnitude of gravitational acceleration at the top of Mt. Everest? Mass of the Earth is 5.97×10^24 kg.
The sun's intensity at the distance of the earth is 1370 W/m2. 30% of this energy is reflected by water and clouds; 70% is absorbed. What would be the earth's average temperature (in ?C) if the earth had no atmosphere
The mass has a kinetic energy of 17.0 J as it passes through its equilibrium position (the point at which the spring force is zero). At what rate is the spring doing work on the mass
Find the speed and acceleration of an electron in the first two Bohr orbits of the Li++ Ion. Also find the acceleration of an electron in the first two bohr orbital of the H atom.
A spherical brass shell has an interior volume of 1.51 x 10-3 m3. Within this interior volume is a solid steel ball that have a volume of 0.53 x 10-3 m3. What is the volume of mercury that spills out of the hole
A strip of doped silicon 325 µm wide contains 9.6 1022 conduction electrons per cubic meter and an insignificant number of holes, What is the thickness of the strip
A 7.0-mm diameter hole is 1.0m m below the surface of a 2.0m diameter tank of water. What is the rate, in mm/min, at which the water level will initially drop if the water is not replenished
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