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A conducting sphere of radius R carries a net positive charge Q, uniformly distributed over the surface of the sphere. Assuming that the electric potential is zero at an infinite distance, what is the electric potential at a distance r = R/7 from the center of the sphere?
High speed stroboscopic photographs show that the head of a200-g golf-club is traveling at 55m/s just before it strikes a 46 ggolf ball at rest on a tee. Find the speed of the golf ball just after impact
A35.0 kg child starting from rest slides down a water slide with a vertical height of 19.6 m.(Neglect friction) What is the child's speed three-quarters of the way down?
A vibration sensor, used in testing a washing machine, consists of a cube of aluminum 1.50 cm on edge mounted on one end of a strip of spring steel (like a hacksaw blade) that lies in a vertical plane. what is its frequency of vibration
An ideal monatomic gas in a volume undergoes an adiabatic change from P1 = 8.2 × 105-Pa and V1 = 0.17-m3 to triple its initial volume. How much work is done on the gas?
A long, rigid conductor, lying along the x axis, carries a current of 4.0 A in the negative direction. A magnetic field B is present, given by B = 2.5i + 8.5x2 j , with x in meters and B in mT. Calculate the k-component of the force on the 2 m segmen..
A 0.330-kg volleyball approaches a player horizontally with a speed of 16.0 m/s. What impulse is delivered to the ball by the player
An unmarked police car traveling a constant 95 is passed by a speeder traveling 115 . Precisely 1.00 after the speeder passes, how much time passes before the police car overtakes the speeder
A certain laser emits light in a narrow band of wavelengths centered at 632.7 nm and with a ''wavelength width'', What is the corresponding ''frequency width'' in hertz for the emission
Calculate the linear momentum and angular momentum of a Frisbee of mass 0.126 kg if it has a linear speed of1.95 m/s and an angular velocity of 51.5 rad/s. Treat the Frisbee as a uniform disk of radius 13.5 cm.
A 3.0 kg wooden board is held in place by a rope on one end; the other end is held up by being in contact with a rough, vertical brick wall, as shown. The angles are as shown, and length of the board is 2.0m. Find the values of three forces: the t..
you are moving into an apartment and take the elevator to the 6th floor. suppose your weight is 663 n and that of your
A large laser emits an intense pulse of light delivering an energy of 5020J in 1.28×10-2s. how many photons are emitted in this pulse
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