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The propeller of an toy airplace is at rest when the controller starts the engine. Two seconds later, the propeller is rotating at 3.13 rad/s. Through how many rotations has the propeller of the toy airplane rotated during those first two seconds?
A microscope has a 12.0 x eyepiece and a 59.0 objective lens 20.0 cm apart. Calculate (a) the total magnification, (b) the focal length of each lens, and (c) where the object must be for a normal relaxed eye to see it in focus?
Jason has a 45-power telescope whose objective lens has a focal length of 120 {\rm cm}. What is the angular magnification of his sister when viewed through the "wrong" end of the telescope
A light bulb is wired in series with a 122-? resistor, and they are connected across a 120.0-V source. What is the resistance of the light bulb
A satellite with mass 2200kg is initially in a circular orbit a distance 325km above the earth's surface. Due to air drag, the satellite's altitude decreases to 250km. Calculate the change in gravitational potential energy
Consider a spherical Gaussian surface and three charges:q1=1.76microC, q2= -2.50microC, and q3=3.69microC. Find the electric flux through the Gaussian surface
When t = 0 s, a flower pot on a window sill drops from rest to the sidewalk some 32.0 m below, How long was the pot in flight
a particle of mass 0.10 kg is attached to a spring of spring constant 10nm. if the maximum acceleration of the particle
A cube of ice is taken from the freezer at -9.5°C and placed in a 105 g aluminum calorimeter filled with 323 g of water at room temperature of 20°C. What was the mass of the ice cube
A car goes around a curve on a road that is banked at an angle of 31.5 degrees. What is the radius of the curve
If the barge can only be pushed 18 cm deeper into the water before water overflows to sink it, how many 400 kg horses can it carry.
The outside mirror on the passenger side of a car is convex and has a focal length of -5.7 m. compute the magnification of the mirror
A sign weighing 400N is suspended at the end of a 350N uniform rod that is hinged at the wall. What is the tention T in support cable
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