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Consider a sample containing hydrogen atoms at 300 K. At what temperature would one percent of the atoms be in the n= 2 state? At that temperature, what fraction of the atoms will be in the n 3 state?
A single slit has a width of 2.1x10^(-6)m and is used to form the diffraction pattern. Find out the angle that locates the second second dark fringe when the wavelength of the light is 430 nm.
A spaceship and an asteroid are moving in the same direction away from Earth with speeds of 0.76c, What is the relative speed between the spaceship and the asteroid
An object of interest is 3 mm from an objective for a compound microscope with a lens power of +250 D. what is the magnifying power of the eyepiece
A hockey puck slides off the edge of a table at point A with an initial velocity of 20.0 m/s, What is the speed (not the velocity) of the puck just before it touches the ground
A high-speed photograph of a club hitting a golf ball, find the average force exerted on the ball by the club
A century ago, scientists believed that the universe was infinite with no beginning and no end. Einstein then predicted that the universe is either contracting or expanding. Why do you think Einstein thought that the universe had no beginning? Do you..
A rigid tank contains mixture of liquid and vapor. The mixture is 12.3% quality at 100°C. The tank is 10L. The tank is then heated. Calculate the heat transfer required for the end temperature reaches 150°C.
a silvered sphere is used as a christmas tree ornament has a diameter of 0.08 m. a girl holds the ornament 0.2m from
A car is designed to get its energy from a rotating flywheel (solid disk) with a radius of 1.00 m and a mass of 400 kg. Find the kinetic energy stored in the flywheel
Suppose you want a capacitor bank with a total capacitance of 1.450 F and you possess numerous 2.50 mF capacitors. What is the smallest number you could hook together to achieve your goal
If this amount were shaped into a cube, what would be the length of one edge of that cube (in meters)
Consider a systen of N non-interacting particles for which the energy of each particle can assume two and only two distinct values: 0 and E (E>0). Find the entropy of the system
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