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A mono energetic beam of electrons (me = 9.11 x 10-31 kg) whose kinetic energy is 120 eV is incident on a single slit of width 1.0 nm. A diffraction pattern is formed on a screen 20 cm from the slit. What is the width of the central maximum (i.e. the distance among first minima) of the diffraction pattern?
A sealed closed tube length=1.5 m of unknown gas, frequency = 210 Hz. what is the speed of sound in that gas
A Potter's wheel moves from rest to an angular speed of 0.16rev/s in 26 s. Find its angular acceration in radians per second
A 42-kg girl is standing on a 125-kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. What is her velocity relative to the ice surface
An atom in a solid vibrates at 13 THz with amplitude 13 pm. Find the atom's maximum acceleration
one capacitor with two flat conductors are seperated with 4mm. the area of each plate is 5m^2. one plate has charge of +200mC , calculate the capacitance of the device
A positive charge of 0.800? C is located in a uniform field of 9.00×104 N/C. How close are the two charges
An electron moves in a circular path perpendicular to a uniform magnetic field with a magnitude of 2.1 mT. Estimate the time it takes to complete one revolution
When a solid uniform sphere is spinning about an axis through its center, its rotational kinetic energy is K. Obtain the rotational kinetic energy of the second sphere
if a boat floats in two types of liquid, one more desnse than theother, where is the buoyant force greater on the boat
A child with a mass of 34.91 kilogram is swinging from a rope tied to the branch of a tree. The rope is 2.85 meter long. Calculate the frequency of the child's swing
The runner turns around and runs in the -x direction at the same speed. Now what is the kinetic energy of the runner
Find the maximum temperature in a Carnot cycle operating in a room-temperature (23 degrees C) environment if its Carnot efficiency is 0.2. Express your answer using one significant figure. TH = ? K
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