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A laser is used in eye surgery to weld a detached retina back intoplace. The wavelength of the laser beam is 514 nm, while the poweris 1.5 W. During surgery, the laser beam is turned on for 0.050 s.During this time, how many photons are emitted by the laser?
Determine the wave's amplitude. Determine the wave's wavelength.Determine the wave's frequency.Determine the wave's speed of propagation. Determine the wave's direction of propagation.
A spotlight on a boat is y = 2.7 m above the water, and the light strikes the water at a point that is x = 9.4 m horizontally displaced from the spotlight (see the drawing). The depth of the water is 4.0 m. Determine the distance d, which locates the..
A shopper in a supermarket pushes a cart with a force of 33 N directed at an angle of 25° below the horizontal. Find the work done by the shopper as she moves down a 44 m length aisle
If its length is 49.8 m when measured from inside the spacecraft, what is its length measured by a ground observer
A planet of total mass M and radius R has a non-uniform density such that p(r) = po (1-r/R), Determine the gravitational field g(r) at a point r ? R inside the planet
You want to take a full-length photo of your friend who is 1.94m tall, using a 35.0mm camera having a 50.0mm lens, How far is the lens from the film
Starting from rest, a 92-kg firefighter slides down a fire pole. How far did he slide down the pole
Listen to whales' songs and explain the effects of sound waves in the air and water by bringing examples with formulae. How could you distinguish the whales' songs from other songs
What power is dissipated in a single light. A proton is fixed in place. An electron is released from rest and allowed to collide with the proton. Then the roles of the proton and electron are interchanged, and same experiment is repeated. Which is ..
When a grating is used with light that has a wavelength of 541 nm, a third-order maximum is formed at an angle of 30.0°. How many lines per centimeter does this grating have
A metal ball with a mass of 3.81·10-6 kg and a charge of +5.21 mC has a kinetic energy of 4.77·108 J. how close will it come to the plane before stopping
A pump is used to send oil (density 800 kg/s) through a hose the diameter of which is 5 times that of the nozzle through which the water exits. what is the gauge pressure of the oil in the pump
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