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A man clearly see an object that is 2m away(or more) without glasses. if the glasses have a refractive power of +1.50D, how close can an object be to the eyeglasses and still be clearly seen by the man? Assume the eyeglasses are 2cm from the eye.
A force vector has a magnitude of 584 newtons and points at an angle 45o of below the positive x axis. What are (a) x scalar component and (b) y scalar component of the vector.
For many years Colonel John P. Stapp, USAF, held the world's land speed record. He participated in studying whether a jet pilot could survive emergency ejection.
A 50.0-kg woman stands at the rim of a horizontal turntable having a moment of inertia of 560 kg · m2 and a radius of 2.00 m. find With what angular speed does the turntable rotate
A parallel-plate capacitor in air has a plate separation of 1.49 cm and a plate area of 25.0 cm2. The plates are charged to a potential difference of 255 V and disconnected from the source.
A uniform door weighs 46-N and is 0.9 m wide and 2.5 m high. What is the magnitude of the torque because of the door's own weight about a horizontal axis perpendicular to the door and passing through a corner.
a block on a frictionless horizontal surface is attached to a spring (k=30 N/m). the mass is displaced to the right of equilibrium and released from rest. calculate amplitude of oscillations
A light spring-gun projectile launcher is mounted on an 0.453 kg air track glider. The gun points upward at an angle of 32 o with the horizontal track. What is the speed of the air-track glider after the gun is fired
q1. a 2.60- metal bar 1.50 long and having a resistance of 10.0 rests horizontally on conducting wires connecting it to
The electric field at point P just outside the outer surface of a hollow spherical conductor of inner radius 10 cm and outer radius 20 cm has magnitude 445 N/C, what is the charge on the inner surface of the conductor
string under a tension of 50.5 N is used to whirl a rock in a horizontal circle of radius 2.55 m at a speed of 20.3 m/s on a frictionless surface, What is the breaking strength, in newtons, of the string
You've been walking at a steady, and rope pulls up on the sled at a 21 angle. You estimate that the mass of the sled, with your friend on it, is 64 and that you're pulling with a force of 84.0.
Consider the situation where a 5 kg block sits on top of a 10 kg block. The two blocks rest on a horizontal frictionless surface. What is the acceleration of the "two block" system
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