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The mean free path of nitrogen molecules at 8.2°C and 1.42 atm is 0.292 x 10-5 cm. At this temperature and pressure there are 3.71 x 1019 molecules/cm3. What is the molecular diameter?
A light bulb operates at 2.1 percent efficiency. The emitted light is 555 nm, find the number of photons per second given off
A pinhole camera is made from an 82cm -long box with a small hole in one end, how tall will the image of the person on the film be
find the quantum number that characterizes the earths orbit around the sun. the earth mass is 6.0x1024 kg its orbital
a 2 kg uniform flat disk is thrown into the air with a linear speed of 10 m/s. As it travel the diak spins at 3.0 rev/s. what is the magnitude of its angular momentum
You accidentally throw your car keys horizontally at 8.0 m/s from a cliff 64 m high. How far from the base of the cliff must you look for the keys?
A 7.01- g bullet is moving at 563.00 m/s as it leaves the 0.58- m-long barrel of a rifle. What is the average force on the bullet as it moves down the barrel
A hoop is rolling with-out slipping along a horizontal surface at 11 m/s, Evaluate what is the speed of the hoop after it has rolled 6.00m up the ramp
what horizontal force is required to move the crate. If the coefficient of kinetic friction between a 33 kg crate and the floor is 0.26, what horizontal force is required to move the crate at a steady speed across the floor? Which is 84 I just help..
A bullet of mass 0.5 kilogram is headed at horizontal speed 130 m/s toward a block of mass 4.5 kilogram resting on a horizontal frictionless surface.Find what average force did the block exert on the bullet
The Golden Gate Bridge in San Francisco has a main span of length 1.28 km, one of the longest in the world. At what temperature would the wire reach its elastic limit
A projectile is launched with a momentum of 200 kg • m/s and 1000 J of kinetic energy. What is the mass of the projectile
F = G.Mm/r2 where F is the gravitational force, M and m are masses, and r is a length. Force has the SI units kg · m/s2. What are the SI units of the proportionality constant G
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