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A mother sees that her child's contact lens prescription is +0.750 D. What is the child's near point, assuming the contact lens is designed to enable the child to see objects 25.0 cm away clearly?
a mass sitting on a horizontal frictionless surface is attached to one end of a spring the other end is fixed to a
A Carnot engine performs work at the rate of 380 kW when using 730 kcal of heat per second. If the temperature of the heat source is 560 C, at what temperature is the waste heat exhausted.
Frank and Mary are twins, and Mary wants to travel to our nearest star system, Alpha Centauri (4.30 lightyears away). How old will Frank be when she returns
if a car goes over a hill at a speed of 20 ms what is the size of the normal force felt by a 60 kg passenger in the car
The charged plates of a parallel plate capacitor each have a charge density of ? C/m2. compute the electric field between the plates
You are designing an elevator for a hospital. The force exerted on a passenger by the floor of the elevator is not to exceed 1.51 times the passenger's weight. What is the maximum speed of the elevator
A spark occurs at the tip of a metal needle if the electric field strength exceeds 4.00×106 N/C, What is the minimum surface charge density for producing a spark
Two wheels have the same mass and radius of 4.3 kg and 0.50 m, respectively. One has the shape of a hoop, Find the net external torque that acts on each wheel
In preparation for an experiment that you will do in your introductory nuclear physics lab, you are shown the inside of a Geiger tube. Calculate the capacitance of your tube
you have three 3.0 uf capacitors. two of the capacitors are in parallel and this parallel combination is in series with
An automobile moves at constant speed over the crest of ahill. The driver moves in a vertical circle of radius 20 m.What is the speed of the vehicle
A person sees clearly wearing eyeglasses that have a power of -2.54 diopters and sit 1.5 cm in front of the eyes. If the person wants to switch to contact lenses, which are placed directly on the eyes, what lens power should be prescribed?
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