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A certain digital camera having a lens with focal length 7.50cm focuses on an object 1.90m tall that is 4.70m from the lens.
a) How far must the lens be from the photocells?
b) Is the image on the photocells erect or inverted? Real or virtual?
c) How tall is the image on the photocells?
d) A SLR digital camera often has pixels measuring 8.00 8.00 . How many such pixels does the height of this image cover?
Two identical guitar strings are prepared such that they have the same length (1.91 m) and are under the same amount of tension. What is the wave propagation speed on the guitar strings
A person in an elevator is holding a 25 kg block by a cord rated to withstand a tension of 335 N. Starting from rest, the elevator begins to move upwards at a constant acceleration and the cord holding the block breaks. What was the least accelera..
Suppose two highly precise, identical clocks are synchronized and one clock is placed on the North Pole and the other on the equator. how much will the clocks differ in time
A weather emergency siren is mounted on a tower, 177 meters above the ground. On one hand, you would like to make the siren very loud so that it will warn as many people as possible. what is the maximum power that the siren can put out
A glass soda bottle is emptied of soda and filled to the very top with water. A cork is carefully fitted into the top of the bottle, leaving no air between the cork and the water.
Suppose you have an electric hot water heater for your house which is an aluminum cylinder which has a 0.56 m radius and is 1.8 m high. The walls are 1.0 cm thick.
A 40 ohm resistor and a 60 ohm resistor are connected in series to a 12 volt battery. What is the voltage difference across each resistor
Estimate how long it will take to heat a cup of soup. What is the net force exerted on the skier.
A beam of laser light with a wavelenth of ? = 690.00 nm passes through a circular aperture of diameter a = 0.133 mm. What is the angular width of the central diffraction maximum
Using energy considerations, compute the average force the beam exerts on the pile driver while the pile driver is brought to rest.
A single strand of wire of adjustable length is wound around the circumference of a round balloon that has a diameter of 25.0 cm, what is the magnitude of the average value of the emf induced in the loop
a spring with a force constant of 52 n m has a relaxed length of 2.45 m. when a mass is attached to the end of the
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