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An electromagnetic wave has the wavelength of 42.6 ?m and intensity of 78.5 W/m^2.
How many photons are there in 1 cubic meter?
Number of photons =
Find the momentum of one photon.
Momentum of 1 photon = ____ kg·m/s
Find the total momentum of photons in 1 cubic meter.
Total momentum = ____ kg·m/s
The equation of a transverse wave traveling in a string is given by y=A sin(k x??t). The tension in the string is 18.0 N, A = 1 mm, k = 22 rad/m, ? = 325 rad/s. What is the linear density of the string. I have the speed of the wave but i cant get ..
What is the net force exerted on the skier, assuming his acceleration is constant.
A student hits the cork sharply with her fist and the bottom of the bottle breaks. The student's fist has a mass of m = 0.480kg and moves downward at a speed of vi = 5.00m/s. What is the force that the fist exerts on the top of the bottle
a closed Gaussian surface in the shape of a cube of edge length 3.35 m. What is the net charge (in Coulombs) contained by the cube
A grinder consists of a solid 15 kg disk with a diameter of 57 cm. A when active, the disk rotates at a rate of 83 rad/sec. find the rate of angular acceleration of the disk
A massive pulley in the shape of a solid disk is mounted on an axle with negligible friction. What is the mass of the pulley
While john is travelling along an interstate highway, he notices a 160 mile marker as he passes through town. Later John passes another mile marker, 119.
When the dried up seed pod of a scotch broom plant bursts open, it shoots out a seed with an initial velocity of 3.0 m/s at an angle of 60.0° above the horizontal. What horizontal distance does it cover during its flight
A charged particle of mass m and positive charge q moves in a uniform constant electric and magnetic fields, E pointing in the y direction and B in the z direction, Find the electric force on the particle
A soccer ball with mass 0.285kg is initially at rest and is kicked at an angle of 22.8 (degrees) with respect to the horizontal. What is the impulse received by the soccer ball during the kick
a rock is sliding alone a horizontal surface with a veolcity of 8.5 ms . it eventually stops due to friction. what is the power produced by the fricition
A 7.80-g bullet moving at 480 m/s penetrates a tree trunk to a depth of 6.0 cm. Use work and energy considerations to find the average frictional force that stops the bullet
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