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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
Units of km
An aircraft weighing 849?N is accelerated?at 7?m/s2 for?13 seconds, at which time the aircraft launches.? How much work was done on the aircraft
A large tub rests at the edge of a table 1m high. The tub is full, and is 2m tall with an area of 1000cm^2. Determine the speed of the water as it leaves the side
At the beginning of the interval the astronaut is moving toward the right along the x-axis at 15.40, and at the end of interval she is moving toward the right at 5.40.
A 76kg student consumes 2500 Cal each day and stays the same weight. One day, he eats 3500 Cal and, wanting to keep from gaining weight, decides to "work off" the excess by jumping up and down.
a 5.0 kg object is supported by an aluminum wire of length 2.6m and diameter 2.2mm. How much will the wire stretch
Light inside an optical fiber tube hits the wall between the tube and air and is totally internally reflected. what is the index of refraction of the tube
A 2.16 kg block on a horizontal floor is attached to a horizontal spring that is initially compressed 0.0320 m. The spring has force constant 840 N/m.
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. What is the orbital period of the faster planet, in years
Samantha pushes a 50.0 N crate up a ramp 25.0 m in length and inclined at 10.0 degrees with the horizontal. What potential energy does the crate experience
A circular wire loop of area 0.18m squared carries a current of 4 A. the coil lies in a horizontal plane with the current flowing in the counterclockwise direction, find the magnitude of the torque which acts on the loop
In the previous question, assume that the applies forces are 10N @ 41 degrees and that Force 2 acts at 138 degrees. Calculate the magnitude of the normal force from the floor
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