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A microscope has an objective lens of focal length 6.00 mm. The objective forms an image16.5 cm from the lens. The focal length of the eyepiece is 2.80 cm and the distance among the lenses is 19.3 cm.
What is the angular magnification? The near point is 25.0 cm.
A ball is launched directly upward from ground level with aninitial speed of 19 m/s. (Air resistanceis negligible.) How long is the ball in the air? What is the greatest height reached by the ball?
Du Pont and net income Ebersoll Mining has $6 million in sales; its ROE is 12 percent; and its total assets turnover is 3.2 . The company is 50 percent equity financed. Illustrate what is its net income?
The current amplitude in an inductor in a radio receiver is to be 250 microA when the voltage amplitude is 3.6V at a frequency of 1.60Hz. What inductive reactance and inductance is needed
The Earth orbits the Sun once per year. What is the centripetal force keeping the Earth in orbit
The electric field on the axis of a uniformly charged ring has magnitude 400 kN/C at a point 6.4cm from the ring center. Find the ring's radius
A 194 N force is needed to slide a box across a flat surface at a constant velocity. What is the coefficient of kinetic friction between the box and the floor. (Use g = 9.8 m/s2.)
A machine is designed to perform a given amount of work in a given amount of time. Find the power of the second machine
A 87.0-kg man is riding an escalator in a shopping mall. What is the work done on the man by the gravitational force
What is the minimum speed you must give the air at the top. find its final kinetic energy.
A straight wire of length 3.5 m carries a current of 42 A and it is placed on a horizontal table in a horizontal uniform magnetic field. what is the magnitude of the magnetic field
A helicopter drops an inflatable raft to flood victims floating ina lake. How far from the victims does the raft land
A solid spherical ball of mass 1.21 kg and radius 0.07 m rolls along a smooth, level surface with a speed of 2 m/s. How far up the plane does the ball go
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