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The far point of a nearsighted person is 5.0m from her eyes, and she wears contacts that enable her to see distant objects clearly. A road sign is 20.0m away and 2.5m high, (a) When she looks through the contacts at the sign, what is its image distance? (b) How high is the image formed on the retina?
Type A nerve fibers in humans can conduct nerve impulses at speeds up to 140m/s, How fast are the nerve impulses in miles per hour
To focus a camera on objects at different distances, the converging lens is moved toward or away from the film, Over what distance must the lens be movable
Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occuring electrons is removed. The radius of the orbit is 3.45 × 10-11 m. Determine the magnitude..
excess electrons are placed on a small lead sphere with a mass of 8.35 so that its net charge is -3.65times10-9 .find
A spaceship with a proper length of 101 m passes an observer at a speed of 0.82770c. What is the length of the ship as seen by the observer
a flywheel of mass 12kg and radius 20cm is mounted on a light horizontal axle of radius 5cm which rotates on
An alpha particle is a helium nucleus that consists of two protonsbound with two neutrons. An alpha particle moving through aperpendicular magnetic field of 1.1 Texperiences an acceleration of 2020m/s2. What is the alpha particle's speed?
Two masses, M=3.8kg and m=2kg, are hung over a massless, frictionless pulley. What is the downward acceleration of mass M
Consider a series RLC circuit with R = 15 , L = 208 mH, C = 75 µF, and a maximum voltage of 142 V. What is the impedance of the circuit at resonance?
A cylindrical aluminum rod, with an initial length of 0.8200 m and radius 1200.0 µm, is clamped in place at one end and then stretched by a machine pulling parallel to its length at its other end. Assuming that the rod's density (mass per unit volume..
An artificial satellite circling the Earth completes each orbit in 133 minutes. Find the altitude of the satellite
q1. if the weight of a room full of water is so great why dont the first floors of houses built over basements all
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