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The lifetime of the excited component of the n = 1 state (parallel spins) that produces the 21 centimeter line transition is approximately 107 years. Determine what is the energy line width of this state?
Xu is a new material discovered by a TA. The specific heat C and latent heat L of Xu are measured by heating up a piece of Xu sample. The temperature T (in K) of Xu sample varying as a function of heat Q (in 103 J) transferred to it.
If a helium nucleus with a mass of 6.68x10^-27kg, a charge of +2e, and an initial velocity of 1.50x10^7 m/s is projected head-on toward a gold nucleus with a charge of +79e, how close will the helium atom come to the gold nucleus before it stops a..
A 5000kg satellite orbits earth at a distance of 35,000km above the surface of the earth. Calculate its velocity and its period
Light passes from air into a substance. The angle of refraction is 22degrees and angle of incidence is 30 degrees. Compute the polarizing angle for this substance. Name a substance that has this index of refraction.
Each croquet ball in a set has a mass of .5 kg. The green ball travels at 10.5m/s and strikes a stationary red ball. what is the final speed of the red ball after the collision
Outline what you know about the electronic structure of graphene and outline two methods to make carbon nanotubes
A skier leaves the starting gate at the top of a ski jump with an initial speed of 4 m/s. the starting position is 120 m higher than the end of the ramp, which is 3 m above the snow. FIND THE FINAL SPEED of the skier if he lands 145 m down the 20 deg..
the froghopper philaenus spumarius is supposedly the best jumper in the animal kingdom. to start a jump this insect can
Two converging lenses having focal lengths of f1 = 11.1 cm and f2 = 20.0 cm are placed d = 50.0 cm apart, The final image is to be located between the lenses, at the position x = 28.3 cm.
The starter motor of a car engine draws a current of 180A from the battery. How far does an electron travel along the wire while the starter motor is on
The drawing shows a triple jump on a checkerboard, starting at the center of square A and ending on the center of square B, What is the magnitude of the displacement of the colored checker during the triple jump
A solid cylindrical disk is to be used as a stabilizer in a ship. By using a massive disk rotating in the hold of the ship, the captain knows that a large torque is required to tilt its angular momentum vector.
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