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A middle-aged man starts to wear eye glasses with lenses of1.5 D that allow him to read a book held as close as25 {\rm cm}. Several years later, hefinds that he must hold a book no closer than 33 cm to read it clearly with the same glasses, sohe gets new glasses.What is the power of the new lenses?
sr-90 may be produced from an atomic bomb explosion. the half-life of sr-90 is 28.8 years. what fraction of the sr-90
An automobile starter motor has an equivalent resistance of 0.0470 and is supplied by a 12.0 V battery with a 0.0120 internal resistance. What is the current to the motor
An electrical motor spins at a constant 2675 rpm. If the armature radius is 3.49 cm, what is the acceleration of the edge of the rotor
A rubber ball is able to bounce 0.90 times the height from which it is dropped. WHat is the ball's resultant displacement from it's initial hieght to it's maximum height after one bounce
A pitcher throws a curveball that reaches the catcher in 0.59 s. The ball curves because it is spinning at an average angular velocity of 380 rev/min on its way to the catcher's mitt. What is the angular displacement of the baseball as it travels ..
In a two-slit interference experiment, with the sits 0.041 mm apart and screen at a distance 75 cm, What is the wave length of the light
A projectile of mass 0.750 kg is shot straight up with aninitial speed of 18.0 m/s. How long would it go if there wereno air friction
The cheetah can reach a top speed of 114 km/h (71 mi/h). While chasing its prey in a short sprint, a cheetah starts from rest and runs 49 m in a straight line, Determine the cheetah's average acceleration during the short sprint
q1. a delivery truck travels 17 blocks south 16 blocks east and 18 blocks north. what is its final displacement from
Singly ionized helium He+ is hydrogenlike. (a) Construct a carefully scaled energy level diagram for He+, showing the levels for n=1, 2,3,4,5, and 8. (b) What is the ionization energy of He+?
A particle with charge of 4 microcoloumbs is at the origin, another identical particle is placed 2 m from the origin on the positive x-axis and another 2 m on the positive y-axis. (1) Provide a sketch with vectors representing the forces on the ch..
A five-slit system with 7.2 micrometers slit spacing is illuminated with 655nm light. Find the angular positions of the third and sixth minima
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