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A surgeon is attempting to correct a detached retina by using a pulsed laser. If the pulses last for 36.0 ms and if the output power of the laser is 0.680 W,
a) how much energy is in each pulse?
b) If the wavelength of the laser light is 634 nm, how many photons are present in each pulse?
A 5.20 g pop up toy is compressed 1.50 cm and pops up to the height of 50 cm the spring constant is 270 Nm. What is the loss of energy.
A 1.00x10^2 kg crate is being pushed across a horizontal floor by a force P that makes an angle of 30.0° below the horizontal. The coefficient of kinetic friction is 0.200. What must be the magnitude of P, so that the net work done by it and the k..
Two cars of equal mass collide at right angles to each other in an intersection. Which car had the greater velocity before the collision
The first sled is 30kg, connected with rope B to the second sled of mass 20 kg, connected with rope A to the first sled of mass 10 kg, which is being pulled by a rope of 137 N. Illustrate What is the tension in ropes A and B.
In a photoelectric effect experiment, visible radiation is incident upon a metal of work function 1.05 eV. What is the wavelength of the incident radiation
A textbook of mass 2.08kg rests on a frictionless, horizontal surface. What is the tension in the part of the cord attached to the textbook
An electrical resistor has a voltage drop of 5.00 V when 0.300 A of current flows. At what rate (W) is heat dissipated
You're 6.0 m from one wall of a house. You want to toss a ball to your friend who is 6.0 m from the opposite wall. What minimum speed will allow the ball to clear the roof
Bicyclists in the Tour de France reach speeds of 34.0 miles per hour (mi/h) on flat sections of the road. What is this speed in meters per second
The pupil of an eagle's eye has a diameter of 6.0 mm. Two field mice are separated by 0.010 m. How much time passes until the eagle sees the mice as separate objects
Find the lowest energy of the system (in electron volts) and list the quantum numbers of all occupied states. Find when the current in the solenoid increases to 5.0 A in a period of 0.90 s.
The electric field in a region of space has the components Ey = Ez = 0 and Ex = (5.90 N/(C·m))x. Point A is on the y axis at y = 4.30 m, What is the potential difference (in V) VB - VA
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