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People who suffer from cataracts may have the lenses in their eyes replaced by artificial lenses.
a) If a given person has a distance of 22.0 mm between her lens and retina, what refractive power would an artificial lens need to have to allow her to see far away objects clearly?
b) There is no accommodation with the artificial lens, so she has to use glasses to focus on objects close-up. If an object is held 25.0 cm away from her glasses, what is the refractive power of the glasses she will need to see the object clearly?
What is the velocity of observer B relative to observer A . A diver shines a light up to surface of a flat glass-bottomed boat at an angle of 36 relative to the normal.
A ball on the porch rolls 60 {rm cm} to the porch's edge, drops 40 {rm cm}, continues rolling on the grass, and eventually stops 80 {rm cm} from the porch's edge.
An ideal air conditioner operating on a Carnot cycle absorbs heat Q2 from a house at temperature T2 and discharges Q1 to the outside at temperature T1, consuming electrical energy E.
At a recent rock concert, a dB meter registered 114 dB when placed 1.30 m in front of a loudspeaker on the stage, What was the power output of the speaker
q1. a rifle fires a 2.39 10-2-kg pellet straight upward since the pellet rests on a compressed spring that is released
Three point mass particles are located in a plane: 3.67 kg located at the origin, How far is the center of mass of the three particles from the origin
A 2.54 kg particle moving along the x-axis experiences the force shown, where Fmax=6.85 N, Fmin=-6.85 N, d1=1.27 m, d2=2.54 m, d3=3.81 m, and d4=5.08 m. At x=0.00 m the particle's velocity is 3.93 m/s. What is its velocity at x=2.54 m?
The aorta in humans has a diameter of about 1.9 cm and at certain times the blood speed through it is about 60 cm/s. find the Reynolds number for blood flow through the aorta
A 0.33-m-long violin string has a mass of 0.89 g. The peg exerts a 45 N force on it. Determine the lowest frequency sound produced by the vibrating sting
1.)What is the magnitude of the acceleration of an electron at a point where the electric field has magnitude 6495 N/C and is directed due west 2.)Is the direction of the acceleration west or east
Suppose you pour 19 g of water into 1.0 litres jar and seal it tightly. What will be the pressure of the vaporized water
A defibrillator consists of a 16.7-µF capacitor that is charged to 9.0 kV. (a) If the capacitor is discharged in 2.0 ms, how much charge passes through the body tissues? C (b) What is the average power delivered to the tissues?
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