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A woman can read the large print in a newspaper only when it is at a distance of 55 cm or 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 (worn2.5 cm from the eyes), so she can read the newspaper at a distance of 24 cm from the eyes?
A bottle containing 2 kg of water at a temperature of 15°C is placed in a refrigerator where the temperature is kept at 4°C.
During the spin cycle of your clothes washer, the tub rotates at a steady angular velocity of 32.7 rad/s. Find the angular displacement of the tub
Determine the greatest vertical displacement of the pendulum (height). The mass lost by the rocket during these 30.0 is negligible. What impulse does an engine impart to the rocket?
An artillery shell is launched on a flat, horizontal field at an angle of ? = 41.6° with respect to the horizontal and with an initial speed of v0= 327 m/s, What is the horizontal distance covered by the shell
Two identical converging lenses have focal lengths of 15 cm and are aligned on the same principal axis. What is the total magnification of the two lenses
An atomic nucleus initially moving at 385m/semits an alpha particle in the direction of its velocity, and the remaining nucleus slows to 265m/s. what speed does the alpha particle have when it is emitted
A beam of particles is directed at a 0.0178 kg tumor. There are 1.56×1010 particles per second reaching the tumor, Calculate the biologically equivalent dose (in rem) given to the tumor in 26.8 s.
The electron is heading at a 45 angle directly toward the wire when it is 50cm away; the electron reaches only as close as 1.0 cm, before being repelled away, always moving in the same plane. If the electron has an initail speed of 3.4 x 10^6 m/s,
At one instant, force = 5.40 N acts on a 0.399 kg object that has position vector = (1.81 -1.81) m and velocity vector = (-5.91 + 5.91) m/s. determine the object's angular momentum
A jumper in the long-jump goes into the jump with a speed of 12m/s at an angle of 20 deg above the horizontal. How long is the jumper in the air
A river flows due east at 1.43 m/s. A boat crosses the river from south shore to the north shore by maintaining a constant velocity of 10.5 m/s due north relative to the water.
What is the pressure in Pascals at point b if the volume of point b is 0.400.
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