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A nearsighted man uses eyeglasses with a refractive power of 3.8 diopters. wearing the glasses .025m from his eyes, he is able to read books held no closer than .280 m from his eyes. he would like a prescription for contact lenses to serve the same purpose. what is the correct contact lens prescription in diopters?
A woman with a package in her hand is riding in a hot air balloon which is climbing at a constant speed of 8.0 m/s. How long does it take for the package to hit the ground
assume the earth's average temperature is 10 degrees C. Venus is hit by a meteorite and a cloud of dust surrounds the sun. What will in (in centigrade) the new temperature of the earth
Two infinitely long straight currents are parallel to z axis. One of them, carrying a current I1, intersects at the x-y plane at the point (x1, y1); the other, with current I2, intersects at the x-y plane at the point (x2, y2). Find the resultant B p..
A child complains that her 160 g of milk is too hot at 90 degree C. She then pour 80 g of cold milk at 7 degree C in it. If the specific heat of milk is 3800 J/kg.K, what is the temperature of the mixture?
An event occurs at x′ =60m, t′ =8×10-8 sec in a frame S′ (with y′ =0, z′ = 0). The frame S′ has a speed of 3c/5 in the x direction with respect to frame S. The origins of S and S′ coincide at t = 0, t′ = 0. What are the spacetime coordinates of th..
0.25 kg coffee mug is made from a material that has a specific heat capacity of 990 J/(kg°C) and contains 0.31 kg of water. determine the minimum power rating of this heater
determine the magnitude and coordinate direction angles for the resultant force of the combination of the two forces
A flat rectangular coil 15.0 cm wide and 18 cm long, Calculate the emf produced
Emily has a field with uniformly cut grass of height 2 cm which grows at a constant rate. How long would it sustain each animal alone
Calculate the gravitational force on a spacecraft 8700km above the Earth's surface if its mass is 1200kg
A boat's mast is held by two cables, one attached to the front of the ship and the other to the back. What is the force acting upwards on the mast exerted by the boat at the bottom of the mast
An electron is released from rest in a uniform electric field of magnitude 2.20 x 10^4 N/C. Calculate the acceleration of the electron
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