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Light from a laser forms a 1.31-mm diameter spot on a wall. If the light intensity in the spot is 1.58x10^4W/m^2 what is the power output of the laser? Assume that all the light emitted by the laser hits the spot.
a uniform rod of mass 100 g and length 50.0 cm rotates in a horizontal plane about a fixed vertical frictionless pin
A prism whose cross section is shaped like an isosceles right triangle is made from a material with index of refraction, n =1.33. Discover the angle θ of the entering/exiting rays that travel parallel to the lower side (in degrees).
A force F = - k ( x ˆ i + y ˆ j ) [where k is a positive constant] acts on a particle moving in the x-y plane.Starting from origin, the particle is taken to (a, a) and then to ( a 2 , 0. Find the total work done
First discuss how energy can be converted from one form to another, giving specific examples. Define what we mean
An old building is being demolished by swinging a heavy metal ball from a crane. What tension force must the wire be able to withstand
q1. physics instructor wants to produce a double-slit interference pattern large enough for her class to see. for the
You are having a snowball fight with your friend, who is some distance from you. At what angles were the two snowballs launched
An airplane is flying by a velocity of at an angle of above the horizontal. When the plane is a distance directly above a dog that is standing on level ground, a suitcase drops out of the luggage compartment. How far from the dog will the suitcase la..
A portion of Nichrome wire of radius 3.95 mm is to be used in winding a heating coil. If the coil must draw a current of 9.70 A when a voltage of 120 V is applied across its ends, find the following. (Take the resistivity of nichrome to be 1.50 10..
Four charges, Aq, Bq, Cq, and Dq (where q = 2.25 ×10?7 C), sit in a plane at the corners of a square whose sides have length d = 82.5 cm. A charge, Eq, is placed at the origin at the center of the square.
Neutrons in thermal equilibrium with matter have an average kinetic energy of (3/2)kT, where k is the Boltzmann constant, What is the average kinetic energy of the neutrons
In lab, Will burns a 0.6-g peanut beneath 50 g of water, which increases in temperature from 22°C to 50°C. What is the food value in calories per gram? In Calories per gram?
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