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Light of wavelength 300nm strikes a metal whose work function is 2.2eV. What is the shortest de Broglie wavelength for electrons that are produced as photoelectrons?
include a free body diagram. Be sure to label all forces with their agents and size. 1. A 5.0kg cat running along suddenly braces his furry feet on the slippery floot in order to stop.
Two charges, qA and qB, are divided by a distance, d, and exert a force, F, on each other. Analyze Coulomb's law and answer the following questions.
A small piece of dust ofmass m = 4.7 µg travels through an electric aircleaner in which the electric field is 527 N/C. The electric force on the dust particle is equal to the weight of the particle. What is the charge on the dust particle?
The centers of a 15kg lead ball and a 50g lead ball are separated by 10cm, What is the ratio of this gravitational force to the weight of the 50g ball
The water was originally at 0°C. The specific heat of water = 1.00 kcal/kg×°C, The original temperature of the ice was:
A light ray travels inside a large glass block and approached the glass-air interface at some angle relative to the normal (perpendicular to the surface). After entering the air, the light ray's
q1. a fan at a rock concert is 30 m from the stage where sound intensity level is 110 db. her eardrums have the
suppose a uniformly charged ring in the xy plane, centered at the origin. The ring has radius a and positive charge q distributed evenly along its circumference.
A converging lens (f = 14.9 cm) is located 24.6 cm to the left of a diverging lens (f = -7.07 cm). Locate the final image of the stamp relative to the diverging lens
a double- slit interference experiment is performed with two very narrow slits separated by 0.15 mm. what is the distance between two nearby bright fringes on the screen
From the top of a tall building, a gun is fired. The bullet leavesthe gun at a speed of 340 m/s, parallel to the ground. As thedrawing shows, the bullet puts a hole in a window of anotherbuilding and hits the wall that faces the window. Using the ..
A uniform diving board is 5.00 meters in length and weighs 100 Newtons. It is supported by two posts separated by 1.50m. What are the force exerted on the posts
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