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Question: A camera has a lens of focal length 50 mm and a speed of f/2.0. What is the diameter of the lens?
Please show the work for the calculation so I can understand what I'm doing. Thanks!
A scalloped hammerhead shark swims at a steady speed of 1.8m/swith its 83 cm-cm-wide head perpendicular to the earth's52 μT magnetic field. What is the magnitude of the emf induced among the two sides of the shark's head?
A 75g lead sinker at 90 degrees celsius is placed in 500 cm^3 of water at 20 degrees celsius. What is the final temperature of the sinker
A 19.8-g piece of Styrofoam carries a net charge of -0.646 µC and is suspended in equilibrium above the center of a large, What is the charge per unit area on the plastic sheet
A string 2.0 m long is held fixed at both ends. IF a sharp blow is applied to the string at its center, it takes 0.050 s for the pulse to travel to the ends of the string and return to the middle. What are the lowest three standing wave frequencies f..
two small plastic spheres are given positive electrical charges. when they are a distance of 14.2 cm apart the
two identical wheels are moving on horizontal surfaces. the center of mass of each has the same linear speed. however
A child applies a torque of 1200 N*M to a merry go round. The rotational interia of the merry go round is 900 kg*m 2. What is the net torque acting on the merry go round
The volume of a gas is halved during an adiabatic compression that increases the pressure by a factor of 2.5
Use Pascal's principle. Given that Fout is 98 lb., the areas of the output and input cylinders are Aout 22 in2 and Ain 5 in2, what is the input force
An excellent laboratory vacuum has a pressure of 5.00 multiply.gif 10-18 atm, ow many gas molecules are there per cubic centimeter in such a vacuum at 290 K
find the coefficient of kinetic friction between skis and snow.Three equal point charges, each with charge 1.80 mu C, are placed at the vertices of an equilateral triangle whose sides are of length 0.500 m. What is the electric potential energy U o..
A 84 gram arrow is fired from a bow whose string exerts an average force of 115 Newton on the arrow over a distance of 73 centimeter. Find the speed of the arrow as it leaves the bow
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