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0.150kg stone rests on a frictionless, horizontal surface. A bullet of mass 5.00g , traveling horizontally at 380m/s , strikes the stone and rebounds horizontally at right angles to its original direction with a speed of 250m/s. Compute the direction of the velocity of the stone after it is struck.
How many photons are emitted during 7.0 s of operation of a red laser pointer? The device outputs 2.5 Watts at a 635 nm wavelength
A bungee jumper undergoes simple harmonic motion with amplitude 4.6m and frequency 0.145Hz, Determine the bungee jumper's velocity at 1.0 s
A sample of 10.0 mCi decays 1.2% in a single day. What is the activity after 30 days?
A 195 W (121 V) night light is turned on for an average 6.5 hr a day year round. What is the annual cost of electricity at a billing rate of $0.07 per kWh
A 237 kg cart runs into the rear end of a 120 kg cart that is stationary. What is the speed of the moving cart before the collision
Calculate the energy needed to accelerate a spaceship with a mass m = 25 × 103 kg toa speed of 0.40c. Compare this number with the approximate annual energy usage ofEarth, 1021 J
A window air-conditioner unit absorbs 9.70×104J of heat per minute from the room being cooled, What is the energy efficiency rating of the unit
If a bungee cord is stretched horizontally to a length of 2.0m , the tension in the cord is 1.9N. What is the tension in the 3.8-m-long cord
Two point charges, q1 = 2.0 pC and q2 = -2.0 pC, are separated by 5.6 µm. What is the dipole moment of this pair of charges
A point charge q1 = +7e is fixed at the origin of a rectangular coordinate system, and a point charge q2 = -10e is fixed at x = 7.1 nm, y = 0.
A -10.0 nC point charge and a +20.0 nC point charge are 15.0 cm apart on the x-axis. What is the direction of the electric field at the point on the x-axis, between the charges, where the electric potential is zero
A positive charge moves in a region where the magnetic field is uniform, has a magnitude of 60 uT and points in the positive x direction. what is the radius of the resulting path
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