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A beam of hydrogen molecules (H2) is directed toward a wall, at an angle of 55° with the normal to the wall. Each molecule in the beam has a speed of 1.0 km/s and a mass of 3.3x10^-24g. The beam strikes the wall over an area of 2.0 cm^2, at the rate of 1023 molecules per second. What is the beam's pressure on the wall?
A two-slit apparatus is covered with a red (643 nm) filter. When white light is shone on the filter, on the screen beyond the two-slit apparatus, how wide will that diffraction maximum be
A 55.0-kg ice skater is moving at 4.07 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. find the force exerted by the horizontal rope on her arms
A playground merry-go-round has a disk-shaped platform that rotateswith negligible friction about a vertical axis. The disk has a massof 200 kg and a radius of 1.9 m. A 34- kg child rides at the centerof the merry-go-round while a playmate sets it..
A swimmer, capable of swimming at a speed of 1.44 m/s in still water (i.e., the swimmer can swim with a speed of 1.44 m/s relative to the water), How long does it take the swimmer to cross the river
If I eat 500g of something which is 700Bq/kg, with a half life (biological and physical) of 55 days, what is the dose and effective dose on someone who is 70kg.
Find out the height from which you would have to drop a ball so that it would have a speed of 9.7 m/s just before it hits the ground.
After a 0.805 nm x-ray photon scatters from a free electron, the electron recoils with a speed equal to 1.32E+6 m/s. find the Compton shift in the photon's wavelength
What is the dissimilarity between sprinters and nonathletes
A rock is thrown vertically upward with a speed of 11.0 from the roof of a building that is 40.0 above the ground. Assume free fall. What is the speed of the rock just before it strikes the ground?
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.
solve each equation. write the missing quantity the correct unit of measure and the quantity being measured1. x4 kmh
Five vectors of equal magnitude 190mm, make angles26o, -26o, 41o,-41o,and 90o with respect to the x-axis. What is the length in (mm) of the sum of these vectors?
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