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A person struggles to read by holding a book at arm's length, a distance of 49cm away.What power of reading glasses should be prescribed for her, assuming they will be placed 1.9cm from the eye and she wants to read at the "normal" near point of 25cm ?
Calculate the final equilibrium temperature assumning no heat loss after mixing occurs.
a test charge of 3.10 microc is placed 6.10 cm away from a large flat uniformly charged nonconducting surface. the
A ball is thrown directly downward with an initial speed of 7.45 m/s from a height of 29.6 m. After what time interval does it strike the ground
A cube with the side length 1.53 meters of solid styrofoam is completely submerged in fresh water such that the top of the styrofoam block is parallel to the water surface and is 2.55 meters beneath the surface
A 420g oscillator has a speed of 128.5cm/s when its displacement is 3.30cm and 59.5cm/s when its displacement is 5.40cm .what is the oscillator's maximum speed
A 50 ohm resistor and a 100mH inductor are connected in series with an ac generator of amplitudes 5.0V and a variable frequency. Find the peak voltages across the resistor and inductor
An airplane pilot with a mass of 90.0-kg pulls out of a dive by following the arc of a circle whose radius is 300 m at a constant speed of 190 km/h. find the force exerted on the pilot by the airplane seat
In a particular crash test, an automobile of mass 1621 kilogram collides with a wall and bounces back off the wall. obtain the magnitude of the impulse due to the collision
A certain medical machine emits x-rays with a minimum wavelength of 0.02 nm. One day, the machine has an electrical problem, What is the maximum x-ray energy this machine (with electrical problems) can produce
a baked potato at 250 degree celsius and a hot glass of milk at 70 degree celsius are in a tray in the same room.choose
Find the use of an NPN common emitter transistor, advantage of direct - coupled amplifier and bandwidth of an amplifier.
A fully loaded, slow-moving freight elevator has a cab with a total mass of 1310 kg, which is required to travel upward 50 m in 3.4 min, starting and ending at rest. The elevator's counterweight has a mass of only 960 kg, and so the elevator motor mu..
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