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Two circular hoops, with masses and radii in the ratios m2/m1=4 and R2/R1=4, rotate with angular speeds in the ratio ?2/?1=2. What is the ratio of the kinetic energies K2/K1 ?
A solid sphere of uniform density starts from rest and rolls without slipping a distance of d = 4 m down a q = 28° incline. The sphere has a mass M = 5.2 kg and a radius R = 0.28 m. What is the magnitude of the frictional force on the sphere?
A horizontal vinyl record of mass 0.10kg and radius 0.10 m rotates freely about a vertical axis through its center with a rotational speed of 5.10 rad/s.
A car travels east at 94 km/h for 5.0 h. It then travels 45.0° east of north at 129 km/h for 5.0 h. What is the average velocity for the trip
A certain red giant star has a luminosity of 100,000 times that of the Sun and is located 600 light-years from Earth. calculate the rate of interstellar extinction in the direction of the star
In Fig. 29-43, point P2 is at perpendicular distance R = 21.4 cm from one end of straight wire of length L = 10.7 cm carrying current i = 0.949 A. (Note that the wire is not long.) What is the magnitude of the magnetic field at P2 (in T)?
The fresh water behind a reservoir dam is 15.0 m deep. A horizontal pipe 3.00 cm in diameter passes through the dam 8.0 m below the water surface, What volume of water flows out of the pipe
q1. a 5-kg load is fastened vertically to the end of steel wire 0.5m long and 0.0006 sq.cm in cross-section. hanging
A uniformly charged infinite sheet with a surface charge density +? lies flat in the x-y plane. What is the potential difference DV between the two points
A point source of sound waves emits sound uniformly in all directions. What is the power output of the source
A small spherical mass of 8.25 × 10-2 kg and charge of q2 = - 0.40 µC hangs from a thread. What is the tension in the thread
a 100 Watt electric light bulb is plugged into 120 Volt, 60 HZ AC voltage source. What is the peak current in the bulb
Each of two small non-conducting spheres is charged positively, the combined charge being 40 µC. Determine the magnitude of the smaller of the two charges
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