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An electron microscope operates with electrons of kinetic energy 40keV. What is the wavelength of these electrons? (h= 6.626 x 10^-34 J/s, 1eV= 1.6 x 10^-19 J, and me= 9.1 x 10^-31kg)
In this section assume the temperature is 20unless directed otherwise. A submarine 47 deep emits a sonar (sound) wave. How deep is the ocean at that point
q1. a 484g oscillator has a speed of 121 cms when its displacement is 2.10 cm and 56.0 cms when its displacement is
a 2.1103 kg car starts from rest at the top of a driveway that is sloped at an angle of 20 degrees with the horizontal.
The wavelength of visible light varies from 0.40 ?m to 0.70 ?m as the color of the light changes from violet to red. Calculate the energy of a photon whose wavelength is 0.43 ?m
The first sled is 30kg, connected with rope B to the second sled of mass 20 kg, connected with rope A to the first sled of mass 10 kg, which is being pulled by a rope of 137 N. Illustrate What is the tension in ropes A and B.
In SI units, the electric field in an electromagnetic wave is described by Ey = 100 sin(107x - ?t ). What is the frequency of the EM wave
an electronically charged particle accelerates uniformly from rest to speed v while traveling a distance x show that
A 0.002 m^3 block of wood is fully submerged in water of density 1000kg/m^3 by a string with tension 10 N. Find the density of the wood
Two point charges are on the y-axis. A 5.0 µC charge is located at y = 1.05 cm, and a -2.42 µC charge is located at y = -1.30 cm. Find the total electric potential at the origin
A camera requires 5.2J of energy for a flash lasting 1.0 ms. What power does the flashtube use while it%u2019s flashing
A loudspeaker of mass 22 {rm kg} is suspended a distance of h = 2 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has the length of l = 3.90 {rm m}.
Consider an ideal gas at 27.0 degrees Celsius and 1.00 atmosphere pressure. What is the length of an edge of each small cube if adjacent cubes touch but don't overlap
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