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A racetrack is to have a banked curve with radius 225 m. What should be the angle of the bank if the normal force alone is to allow safe travel around the curve at 57.5 m/s?
a 20X microscope objective is designed for use in an oil immersion microscope with 16 cm tube length. the lens is marked NA=.9. what is the diameter of the objective lens
A 61-kg and a 97-kg skydiver jump from an airplane at an altitude of 6100 m, both falling headfirst. Calculate their terminal velocities
What are the magnitude and direction of the net force. how long does it take for the police car to catch up with the speeder.
A physics demo launches a ball horizontally while dropping a second ball vertically at exactly the same time. Which ball hits the ground first? and why
A 500g glider on an air track is at rest, and is attached to a spring with a spring constant of 10 N/m. What is the amplitude and period of the resulting oscillations
a truck moving at 13.3 m/s hits a concrete wall. what is the average force exerted on the wrench by the wall
An oil film with n = 1.45 floats on water. It is illuminated by white light from the sun at noon. If the film is 280 nm thick, find the wavelength and color of visible light that is most strongly reflected upward to an observer positioned above th..
A sound wave traveling at 340 m/s is emitted by the foghorn of a tugboat. An echo is heard 2.60 s later. How far away is the reflecting object? reply in units of m.
Peter and Carter are dropping rocks into a stream from a bridge at a height of 28 m above the water below, As Meg emerges from the water below she is struck by both rocks. Calculate the speed of each rock at impact with Meg
A point charge is held at the center of a conducting spherical shell, whose inner and outer radii are 3.0m and 5.0 m, respectively. What is the net charge on the shell
A 7.0kg hammer strikes a nail at a velocity of 8.6m/s and comes to rest in a time interval of 8.0 ms, estimate the average force acting on the nail
A magnifier used for reading small print is shaped like a hemisphere 2.0 cm in radius, placed on top of a cylinder of the same radius, Where does the image of the print appear to be
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