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An 81 mm focal-length lens is used to focus an image on the film of a camera. The maximum distance allowed between the lens and the film plane is 140 mm.
a. How far ahead of the film should the lens be if the object to be photographed is 10.0m away?
b. How far ahead of the film should the lens be if the object to be photographed is 2.8 m away?
c. How far ahead of the film should the lens be if the object to be photographed is 1.2 m away?
d. What is the closest object this lens could photograph sharply?
Nitrogen in a horizontal piston-cylinder assembly expands from an initial volume of 0.10 m3 to a final volume of 0.5 m3 as the gas is heated for 5 minutes by an electrical resistance heater consuming 1 kW of electric power
Three equal positive charges Q are each fixed at a corner of an equiliateral triangle of side length a, Draw a diagram showing the individual electric field vectors due to each charge at the triangle's center
A 790-kg object and an 889-kg object are separated by 11.0 m. At what position (from the less massive object) can the 260-kg object be placed so as to experience a net force of 10 N towards the less massive object.
A Physicist must determine the mass = m of a block of a wood without a scale. He pulls the block of wood up a ramp angle = 30 degreesusing a rope. find the mass of the block
A circular coil of wire with 54 turns and a radius of 45 cm is laying flat on a horizontal table, compute the magnitude of the magnetic flux through the coil
If a person standing inside an elevator is moving up at uniform speed of 4m/s what is the normal force on her feet? Weight of the person is 60kg
The force on a thin wire from A to B is 500 Ib. What are the magnitude of the force parallel and Perpendicular to an axis line that starts at the origin and goes to the point C ( -2i+7j+3k)m ?
A person with normal eyesight uses a converging lens of focal length 10 cm. At what distance from the job he must hold the lens
An athlete on a trampoline leaps straight up into the air with an initial speed of 5.1 m/s, find the speed of the athlete when she is halfway up to her maximum height
A common capacitor found in the lab is in the form of a cylinder of length 2.5 cm. What is the value of the capacitance
A bullet emerges from the muzzle of agun with a speed of 300m/s. calculate the time for the bullet to travel the lenght of the barrel, assuming the force is zero at the end of the barrel
You are in a hot air balloon (yes, another balloon problem!) rising from the ground at a constant velocity of 2.70 m/s upward. To celebrate the takeoff, you open a bottle of champagne, expelling the cork with a horizontal velocity of 4.00 m/s rela..
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