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The chirping rate of crickets depends on temperature. When the chirping rate is plotted against 1/T it is observed to follow the Arrhenius law (see K.J. Laidler, J. Chem. Ed., 49 (1972) 343). How would you explain this observation?
Lasers are classified according to the eye-damage danger they pose. Find the peak electric field in the laser beam
A certain medical machine emits x-rays with a minimum wavelength of 0.02 nm. One day, the machine has an electrical problem, What is the maximum x-ray energy this machine (with electrical problems) can produce
Calculate the masses of the two stars in the system (watch your units, keep star masses in Msun units, put P into years and A into AU. OR use the full equation of Newton's version of Kepler's 3rd law with G and everything else in the same units as..
An electron moves in a region where the magnetic field is uniform, has a magnitude of 60 mT, and points in the positive x direction. Determine the pitch of the resulting helical path
A large tub is filled to a depth of 50.0 cm with fresh water. Then oil of density 750.0 kg/m3 is poured onto the water. What is the depth of the oil layer
An automobile travels on a straight road for 44 km at 49 km/h. What is the average velocity (in km/h) of the car during this 88 km trip? (Assume that it moves in the positive x direction.)
when an object falls and hits the floor without bouncing off the floor the normal force of the floor on the object
What is the speed of each ball as it strikes the ground? How far apart are the balls 0.700 s after they are thrown.
a hydrogen atom is in the n= 2 state. what's the wavelength of a photon with this energy
Sunlight reaches the surface of the earth with a total intensity of about 1200 W/m^2. What is the total force this sunlight applies
A cyclotron for accelerating protons has a magnetic field strength of 1.6 T and a radius of 0.66 meter. Determine what is the cyclotron frequency
A humanitarian aid package is dropped from a plane flying horizontally 500m above the ground with a speed 100m/s. What is the speed of the package at time of impact? (Calculate the total speed, not a horizontal or vertical projection.)
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