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Barium has a work function of 2.48 eV .
Part A. What is the maximum kinetic energy of electrons if the metal is illuminated by UV light of wavelength 375nm ? Express your answer using three significant figures.
Part B. What is their speed? Express your answer to three significant figures and include the appropriate units.
The shock absorbers in the suspension system of a car are in such bad shape that they have no effect on the behavior of the springs attached to the axles. Each of the identical springs attached to the front axle supports 341 kg.
An individual white LED (light-emitting diode) has an efficiency of 20% and uses 1.0 W of electric power. How many LEDs should be combined into one light source to give a total of 1.6 W of visible-light output (comparable to the light output of a 40 ..
water at a pressure of 4.5 atm at street level flows into an office building at a speed of 0.7 ms through a pipe 5 cm
At a certain instant a particle (mass=0.5 kg) is moving in the +x direction with velocity 14 m/s. What is the magnitude of the momentum of the particle (in kg*m/s) at the end of this 0.15 second interval
a customer slides an empty beer mug down the counter for a refill. the height of the counter is 1.31 m. the mug slides
Decide about the validity of Ampere's Law. Ampere's Law is valid.
The ball falls all the way down and strikes the water below. Determine the magnitude of the velocity of the stone just before it strike the water.
Four resistors are connected to a battery with a terminal voltage of 15 V, as shown in figure. Determine the power delivered to R2. (R1 = 20 ohm;, R2 = 45 ohm)
A 9.95 kg monkey is hanging by one arm from a branch and swinging on a vertical circle. find he magnitude of the centripetal force acting on the monkey
The motor of a table saw is rotating 3450 rev/min. A pulley attached to the motor shaft drives a second puller of half the diameter by means of a V-belt. Estimate the radial acceleration of points on the outer edge of the blade to see why sawdust d..
A train car with mass m1 = 631 kg is moving to the right with a speed of v1 = 7.2 m/s and collides with a second train car with mass m2 = 723 kg. What is the final speed of the train cars latched together
A charge 4.99nC is placed at the origin of an xy-coordinate system, and a charge -2.00nC is placed on the positive x-axis at x = 3.98cm. Find the direction of the total force acting on the third charge
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