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A person with nearsightedness was prescribed with contact lenses of power -2.0 D. By mistake, he was given lenses of power +2.0. What is the range of object distances that this person can see clearly with the wrong lenses?
Use approximate calculations assuming constant current during the output pulse. Calculate the ampere-hour rating of the battery so it lasts for five years.
State the amplitude of the electric field vector in micro volts per meter to three significant figures.
A horizontal desk surface measures 2.08 m x 1.73 m. If Earth's magnetic field has magnitude 0.495 mT and is directed 64.8° below horizontal, what is the magnetic flux through the desk surface.
A girl rides the escalator that moves foward at a constant speed. As the girl raises, how do her gravitational energy and kinetic energy change.
What is the magnitude of the second charge.
A charged particle moves in a region of uniform field along a helical path (radius = 1.0 cm, pitch = 6.0 cm) as shown. Illustrate what is the angle between the velocity of the particle and the magnetic field?
If the pump outlet is blocked and the handle pushed until internal length of the pump cylinder is 21, by how much does the air temperature rise? Suppose that no heat is lost.
A car drives west on sw 8th street at a speed of 30.7 mph. The driver hits the brakes and the car slows down with a constant acceleration of 4.8 m/s^2
The efficiency of a knife is 75%. If you push down on the knife with a force of 5 N to cut a piece of cake that is 6 cm thick, how much work is done on the cake
How far from the dog will the suitcase land. A car accelerates uniformly (a = constant) from 34 meters/second up to 84 meters/second in 3.7 seconds. What is the acceleration of car in meters/second2.
A 52dB sound wave strikes an eardrum whose area is 5.0×10?5m^2 . a)How much energy is received by the eardrum per second? b)At this rate, how long would it take your eardrum to receive a total energy of 7.0J?
A car accelerates from rest to a kinetic energy of 2.06 x 105 J in a distance of 638 m. How much force did the car's engine deliver to produce this acceleration.
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