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A microscope objective has a focal length of 17 mm. It forms an image at 16 cm from its second focal point. How far from the objective is the object located? Answer in units of cm
What is the magnifying power for a person whose near point is at 25 cm if the focal length of the eyepiece is 54 mm?
In a typical game of squash, two people hit a soft rubber ball at a wall until they are about to drop due to dehydration and exhaustion.
The range of human hearing extends from approximately 20 Hz to 20,000 Hz. Find the wavelengths of these extremes at a temperature of 8°C. 20 Hz
a long solenoid has a length of 0.56 m and contains 1540 turns of wire. there is a current of 6.0 a in the wire. what
A meter stick balances horizontally on a knife-edge at the 50.0 cm mark. With two 5.00 g coins stacked over the 15.0 cm mark, the stick is found to balance at the 42.0cm mark. What is the mass of the meter stick
A 54.2 g block of copper whose temperature is 400 K is placed in an insulating box with a 120 g block of lead whose temperature is 200 K. What is the change in the entropy of the system
The Tevatron at the Fermi National Laboratory can accelerate protons to a kinetic energy of 1 TeV. In one particular experiment the kinetic energy of the protons is 650 GeV. What is the de Broglie wavelength of these protons
A block of metal has an actual weight of 45 N and an apparent weight of 25 N in water. What is the buoyant force from the water
An entertainer, when performing a bubble trick, forms one bubble inside another. The surface tension of the bubble liquid is ?=0.04 N m-1. calculate the gauge pressure in the inner bubble
Write an expression for the image distance, di. Numerically, what is the image distance in meters? Is this real or virtual? Numerically, what is the image height, hi?
question1a 12.0kg shell is launched at an angle of 55.0 degrees above horizontal with an initial speed of 150 ms. when
There is a clever kitchen gadget for drying lettuce leaves afteryou wash them. It consists of a cylindrical container mounted sothat it can be rotated about its axis by turning a hand crank.
Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons. What is the net charge of all these electrons
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