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Your task in physics lab is to make a microscope from two lenses. One lens has a focal length of 12 {\rm cm} ,the other a focal length of 2.5 {\rm cm} .You plan to use the more powerful lens as the objective, and youwant its image to be 16 {\rm cm} fromthe lens, as in a standard biological microscope.
What will be the magnification of your microscope?
A replace poker consists of a wrought iron rod, 50 cm long and 5 cm2 in cross-section, fused to a piece of cork 10 cm long, Estimate the temperature at the iron-cork boundary
A ball bearing is dropped from rest at a point A. At the instant it passes a mark 4.0 m below A, another ball bearing is released from rest from a position 5.0 m below A, How far does the second bearing fall in that time
A 0.435 kg mass falls from a height of 3.95 m. how many photons would be produced
A cable is connected at point A (1,2,3) and pulls towards point B (7,7,-1) the force in the cable is 100 pounds.
A box of mass 38.5 kg is sitting on a horizontal table top with a coefficient of kinetic friction between the box and the surface of 0.49. Find the magnitude of the acceleration of the box on the table
Consider the long, straight, current-carrying wires shown in the figure. One wire carries a current of 9.5 A in the negative y direction; the other wire carries a current of 4.5 A in the positive x direction
Explain the phenomenon of resonance. Use the phase of the interfering waves to determine the conditions for and location of constructive and destructive resonance
An object with mass 4.0kg is executing simple harmonic motion, attached to a spring with spring constant 300N/m, Calculate the amplitude of the motion
A 0.20 m 0.70 m 0.40 m block is suspended from a wire and is completely under water. What buoyant force acts on the block
A 13kg box slides 4 m down the frictionless ramp , then collides with a spring whose spring constant is 180Nm.
Alkaid and Merak are 25.6 ? apart in the earth's sky. Find the distance in light years from Alkaid to Merak
What is the relationship between a vector and a coordinate system? Between a vector and the number line? What properties or values of a vector depend on the coordinate system used to express it?
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