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The near point of a naked eye is 21 cm. When placed at the near point and viewed by the naked eye, a tiny object would have an angular size of6.0 × 10-5 rad. When viewed through a compound microscope, however, it has an angular size of -7.9 × 10-3 rad. (The minus sign indicates that the image produced by the microscope is inverted.) The objective of the microscope has a focal length of 2.8 cm, and the distance between the objective and the eyepiece is 19 cm. Find the focal length of the eyepiece.
The box of a well-known breakfast cereal states that one ounce of the cereal contains 107 Calories (1 food Calorie = 4186 J). what is the weight of the heaviest barbell
The thrust produced by a single jet engine, m = 6700 kg, creates a force of F = 67000 N. It takes the jet a distance of d = 0.8 km to take off. What is the take-off speed of the jet vt in m/s
A 150 kg hoop rolls along a horizontal floor so that the hoop's center of mass has speed of 0.180 m/s. How much work must be done on the hoop to stop it.
ball A is dropped (starting at rest) from the top of a buildingof heighth at the sameinstant that ball B is thrown vertically upward from the ground. At what height does the collision occur
A long solenoid that has 1,060 turns uniformly distributed over a length of 0.395 m produces a magnetic field of magnitude 1.00 10-4 T at its center
A large population of aloha users manage to create 50 request/sec,including both originals and retransmissions.time is slotted in units 40msec.
A brick hangs from a string attached to the ceiling. When a horizontal force of 15 N is applied to the brick, What is the mass of the brick
A constant force, F = (4.55, ?3.79, 2.10) N,acts on an object of mass 17.4 kg, What is the total work done by this force
During a 10 minute period, 30 grams of steam condenses into water. How much energy flowed out of the water-steam mixture, What is the change in the entropy of the water-steam mixture
A guitar string is fixed between two points, 53.0cm apart. Its linear density is 12.0g/m. Now suppose the string is vibrating in its third harmonic. What is the distance between nodes
A platinum resistance thermometer has a resistance of 100ohm at 0 deg and the value of alpha is 0.00385. Calculate the temperature
A photon produces a proton-antiproton pair according to the reaction y ---> p+P. What is the minimum possible frequency of the photon
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