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A woman can read the large print in a newspaper only when it is at a distance of 57 cmor more from her eyes.
(a) Is she nearsighted (myopic) or farsighted (hyperopic), and what kind of lens is used in her glasses to correct her eyesight?
(b) What should be the refractive power (in diopters) of her glasses (worn2.0 cmfrom the eyes), so she can read the newspaper at a distance of24 cmfrom the eyes?
the drive train of a bicycle that has wheels 67.3 cm in diameter and pedal cranks 17.5 cm long. Calculate the speed of the bicycle relative to the road
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A 72-kg base runner begins his slide into second base when he is moving at a speed of 3.9 m/s. How far does he slide
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A black hole attracts an object with mass m with a force of mc2RS/(2r2), where r is the distance between the object and the center of the black hole. What is the mass of this black hole
A 2.5-m-long steel wire in a musical instrument has a radius of 0.02 mm. When the wire is under a tension of 91 N, how much does its length change
An electric motor in a hair dryer is running at normal speedand, thus, is drawing a relatively small current. what happens to the temperature of the coil
A series RC circuit with C = 32 μF and R = 6.8 Ω has a 24 V source in it. With the capacitor initially uncharged, an open switch in the circuit is closed. what is the voltage across the capacitor
Calculate the energy of the electron in the ground state of triple ionized beryllium, which has an atomic number Z = 4
question1a long straight wire has fixed negative charge with a linear charge density of magnitude 3.6 ncm. the wire is
Light intensity of a 100 W bulb at a certain distance is 1 W/m2. The distance is doubled. What are the electric field amplitude and the magnetic field amplitude at that new distance
An electromagnetic wave in vacuum has an electric field amplitude of 405 V/m. Calculate the amplitude of the corresponding magnetic field
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