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in a photoelectric effect experiment, the cathode made of chromium (work function = 4.5 eV) is irradiated with ultraviolet light of wavelength 22 nm. what is the stopping potential?
A woman lies on a weightless board across two scales. Her feet are directly over the right scale. How far above her feet is her center of mass
A 55kg pole vaulter running at 10m/s vaults over the bar. If the vaulter's horizontal component of velocity over the bar is 1.10m/s and air resistance is disregarded, how high was jump.
A simple refracting telescope provides large magnification by employing
The highest recorded waterfall in the world is found at Angel Falls in Venezuela. Its longest single waterfall has a height of 807 m. what is the maximum temperature of the water at the bottom of the falls
A farsighted man uses eyeglasses with a refractive power of 1.95 diopters. Wearing the glasses 0.02 m from his eyes, What is the correct contact lens prescription, in diopters
An eye has trouble seeing an object closer than 60 cm but needs to see objects at 25 cm from it. find the focal length of a correctly prescribed contact lens
What was the arrow's initial speed. A small sphere with a mass of 2.00×10^-3g and carrying the charge of 4.80×10^-8C hangs from a thread near a very large, charged insulating sheet. The charge density on the sheet is -2.90×10^-9C/m^2 .
A billiard ball A moving at 5.00m/s hits another ball B, initially at rest, of the same mass. Find the velocity (magnitude and direction) of the second ball after the collision
A baseball is hit at ground level. The ball reaches its maximum height above ground level 3.0 s after being hit. Then 2.5s after reaching its maximum height, ball barely clears a fence that is 97m from where it was hit. Suppose the ground is level..
As a bowling ball of radius 14.0 cm rolls down the alley to the right, a frictional force of magnitude 1.22 N, Find the frictional torque with respect to an axis through the center of the ball
If a Joe pulls a 37-kg crate at a 0.62 m/s^2 using a horizontal strap, when 250N of friction acts on it, what is the Tension in the strap
Write the general equation of Magnetic force on a current carrying wire of length L in a magnetic field B such that the magnetic field and the current direction make an angle different than 0^0 and 180^0
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