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An electron in the beam of a typical television picture tube is accelerated through a potential difference of 20,000 V before it strikes the face of the tube. What is the speed of the electron? what is the eneregy of the electron in joules? what is the energy of the electron in electron volts?
On a hot summer day in the state of Washington while kayaking, I saw several swimmers jump from a railroad bridge into the Snohomish River below. How fast were the swimmers moving when they hit the water
He is unable to get to the other side because of a lack of friction between his shoes and the ice. How long does it take him to reach the south shore
The dimensions of the picture on a 35.0 mm color slide are x = 24.0 mm by y = 36.0 mm. How far is the slide from the lens
A person with a mass of 81Kg and a volume of .089M^3 floats quietly in water. What is the volume of the person that is above water
Since the ends are open, the boundary conditions force the standing wave (representing the displacement of air molecules) that is produced in the bugle to have antinodes at the open ends of the bugle
A submarine on the ocean surface receives a sonar echo indicating an underwater object. What is the object's depth
Find the energy of a photon that is emitted when an electron in a hydrogen atom undergoes a transition from the n=7 level
A person whose eyes are 1.7 m above the floor stands in front of a plane mirror. How far above the floor should the bottom edge of the mirror be placed
7400 J of input heat to perform a certain amount of work. Engine 2 has an efficiency of 0.33, How much input heat does the second engine require
a 0.50 uF capacitor is charged to a 12V battery. How much electrical potential energy is stored in the capacitor
Several vectors in the x-y plane are shown in the figure with their tails at the origin of the coordinate system and with a label at their heads
An old wooden telephone pole with a single cross member was blown off center during a recent storm. To temporarily stabilize the telephone pole, a repair crew has attached a cable from the end of the cross member
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