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Some birthmarks can be removed by exposure to 585 nm laser light. Pulses are strongly absorbed by hemoglobin in the capillaries in the birthmark, destroying them. A typical laser pulse lasts for 1.5 ms, and contains an energy of 7.0 J.
a. What is the power of the laser pulse?
b. How many photons are in each pulse?
A 12.25 mH coil carries a constant current of 0.35 A, clockwise. what potential difference will appear across the coil during this time
create destructive interference between the speakers. Friction provides the force required for a car to travel around a flat, circular race track.
Coulomb's Law describes the force between two charged objects, What is the magnitude and direction of the electrical force on object 2 due to Object 1
When an RLC series circuit is connected to a 120 V rms, 48 Hz line, the rms current in the circuit is 9.10 A and the current leads the line voltage by 45°. What is the resistance in the circuit
Compare the kinetic energy of car travelling. Compare the kinetic energy of an 900 kg car travelling at 30 m/s, and a 1,800 kg car at the same speed.
Starting from the top left corner and moving clockwise the charges are -10 uC, -10 uC, 5 uC, and 5 uC. What is the electric force on the top left charge due to all the other charges
A hydraulic lift is used to jack a 920 kg car 42 cm off the floor. The diameter of the output piston is 18 cm, and the input force is 350 N. What is the area of the input piston
If the electric field strength in air exceeds 3.0 multiplied by 106 N/C, the air becomes a conductor. Using this fact, determine the maximum amount of charge that can be carried by a metal sphere 3.1 m in radius.
A string of 22 identical Christmas tree lights are connected in series to a 125 V source. The string dissipates 52 W. What is the comparable resistance of the light string.
A uniform meter stick is in static rotational equilibrium when a mass of 220 g is suspended from the 5.0 cm mark, What is the mass of the meter stick
A dock worker applies a stable horizontal force of 79.0 {rm N} to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves 14.0 {rm m} in the first 6.00 {rm s}.What is the mass of the bl..
calculate the average acceleration in m/s^2 (meter per second square), using a coordinate system with the X axis in the direction of the car's original motion and the Y axis toward the side of the road to which the car skids.
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