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A laser is used in eye surgery to weld a detached retina back into place. The wavelength of the laser beam is 470 nm, while the power is 2.2 W. During surgery, the laser beam is turned on for 0.049 s. During this time, how many photons are emitted by the laser?
An electron is accelerated by a uniform electric field (1000 V/m) pointing vertically upward. Use energy methods to get the magnitude and direction of its velocity
A wave has an amplitude of 0.25 m, a frequency of 5 Hz and a wavespeed of 4 m/s.a. Write the displacement equation for the wave
How much charge is applied to each of the cylinders.
q1. the crate lies on a plane tilted at an angle theta 27rm circ to the horizontal with muk 0.15.establish the
Calculate the mass of the sun from the radius of the earth's orbit (1.50×1011 m), the earth's period in its orbit, What is the density of the sun
Two small nonconducting spheres have a total charge of 93.1 ?C. When placed 1.01 m apart, the force each exerts on the other is 11.5 N and is attractive. What is the charge on each?
He pushes just hard enough to get the desk moving and continues pushing with that force for 5.00 s. Explain how much work does he do on the desk?
A faulty model rocket moves in the xy-plane (the positive y-direction is vertically upward), Calculate the velocity vector as a function of time
Two wires A and B are of equal length. Each is attached at one end to the ceiling and to a weight at the other end. The cross-sectional area of A is 2.00 mm2 and that of B is 4.00 mm2.
A spacecraft in a circular orbit wishes to transfer to another circular orbit of quarter the radius by means of tangential thrust to move into an elliptical orbit and second tangential thrust at the opposite end
If there is turbulence inside the pipe, then the required pressure to force the water through is significantly higher, so this is to be avoided.
q1. to stretch a relaxed biceps muscle 2.8 cm requires a force of 25 n. find out the youngs modulus for the muscle
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