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Three +3.0-?C point charges are at the three corners of a square of side 0.50 m. The last corner is occupied by a -3.0-?C charge. Find the magnitude of the electric field at the center of the square. (k = 1/4??0 = 8.99 × 109 N ? m2/C2)
A block of wood of mass 2 kg is suspended by long, light strings and is at rest. A bullet of mass 40 g, strikes and remains in the block, causing it to swing. The utmost height of the block above its rest position is 51 cm.
A 10-kg box is stationary on the ground and pushed by a downward force of 30 N. Calculate the supporting normal force acted on the box from the ground
A 750 air-track glider attached to a spring with spring constant 10.5 is sitting at rest on a frictionless air track. A 475 glider is pushed toward it from the far end of the track at a speed of 118 .
a motor starts from rest with an angular acceleration of 12. rad/s ^2 what is the motor angular speed 4.0s later? how many revolutions does it make in this period of time
At which wavelengths (or energies) will you observe lines in infrared absorption (a phonon absorbs a photon) and raman scattering spectra? The temperature is 300 k. raman scattering is excited with a cw Argon laser at 514.5 nm.
what is the electrostatic force that acts on this charge. What would be the least speed required for the rest of the trip to arrive in time for the interview.
A moving particle encounters an external electric field that decreases its kinetic energy from 8650 eV to 6910 eV as the particle moves from position A to position B. The electric potential at A is -56.5 V, and the electric potential at B is +28.1..
he first person is initially moving forward with a speed of 2.50 m/s, and the second person is initially at rest. Illustrate what are the velocities of the two people after the snowball is exchanged? Disregard the friction between the skates and ..
A pair of speakers separated by 0.820 m are driven by the same oscillator at a frequency of 652 Hz. An observer originally positioned at one of the speakers begins to walk along a line vertical to the line joining the speakers.
If both of them are simultaneously plucked at the center, illustrate what is the frequency of the beats that they will produce when vibrating in their fundamental?
when released from rest from this spot, the particle arrives at B with twice the speed it previously had, or 2vB. Find out the potential at B.
A grinding wheel of radius 0.340m rotating on a frictionless axle is brought to rest by applying a constant friction force tangential to its rim. The constant torque produced by this force is 64.5 N • m. Find out the magnitude of the friction forc..
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