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In an advanced laboratory class a student performs the photoelectric experiment. Ultraviolet light is shone on a particular metal and the stopping potential is measured at the same time. It is found that 1.62 V is needed to stop all the electrons when the wavelength of the light is 296 nm, and 2.70 V for a wavelength of 244 nm. What is the work function of the metal?
What is Planck's constant based on this measurement?
A uniform 3.0-m plank weighing 150 N is suspended by vertical ropes at either end. determine the tension in the rope holding the left end of the plank
A particle is displaced in 0.92 s from point A to point B with a uniform speed of 4.8 m/s via a circular path of radius 3.8 m centered at the origin. Obtain the average acceleration of the particle
Archimedes purportedly used his principle to verify that the king's crown was pure gold by weighing the crown while it was submerged in water.
A near-sighted woman cannot focus on any object farther away than a distance x = 57 cm. Find the focal length of the lens which will correct her vision
he density of free electrons in gold is 5.90x10^28 m^-3. The resistivity of gold is 2.44x10^-8 ohms.m at a temperature of 20 C, what is the drift velocity of the electrons in the wire
question1a mountain climber in procedure of crossing between two cliffs by a rope pauses to rest. she weighs 521 n. as
An electron close to a large, flat sheet of charge is repelled from the sheet with a 2.2pN force. Find the surface charge density on the sheet
the official record for the lowest temperature ever recorded on earth was set at Vostok, Antarctica, on July 21, 1983. what is this temperature in degree fahrenheit
A student wishes to determine the coeffiecient of static between a block of material and a wooden board. determine the coefficient of kinetic friction
In the 1994 movie Speed, a bus wired with explosives must maintain a speed of 50mph or the bus will explode. what is the minimum launch angle required for the jump to be successful
A sound wave with intensity 10 mW/m2 interferes destructively with a sound wave that has an intensity of 1 mW/m2. What is the intensity of the superposition of the two
A 3.7cm x 5.8cm rectangle lies in the xz-plane, What is the electric flux through the rectangle if E = (80i + 70j) N/C
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