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A student constructs an astronomical telescope with a magnification of 10. If the telescope has a converging lens of focal length 50 centimeter, obtain the resulting length of the telescope?
A converging lens of focal length 20 cm is used to form a real image 1.0 m away from the lens. How far from the lens is the object
Three resistors, 25, 45, and 75 Ohms, are connected in series, and a 0.51-A current passes through them. What is (a) the equivalent resistance and (b) the potential difference across the three resistors?
A cube of unknown material which is 1 m on a side is observed to float in fresh water with 30% of the cube exposed above the water line. how much of the cube (in percent) is above the water line
A toroid of mean radius 27 cm and circular cross section of radius 1.7 cm is wound with a superconducting wire of length 1000 m that carries a current of 350 A. What is the magnetic field at the mean radius
An automobile starter motor has an equivalent resistance of 0.0480 and is supplied by a 12.0 V battery with a 0.0080 internal resistance. What power is supplied to the motor
the milky way galaxy is traveling at 190 kmsec. how many years will it take for it to crash into another planet that is
A rectangular air mattress is 2.2m long, 0.57 m wide, and 0.07 m thick. If it has a mass of 2.0 kg, what additional mass can it support in water
the speed of sound in air is 331 ms. during the next thunderstorm try to estimate your distance from a lightning bolt
A pump uses a piston of 15 cm diameter which moves 2 cm/s. What is the fluid velocity of a tube 3mm in diameter
A beam of electrons is incident on two slits separated with a distance of2.0×10-6 m. The first-order bright fringes appear on a distant screen at an angle of 0.021 degrees from the central interference maximum.
In a student experiment, a constant-volume gas thermometer is calibrated in liquid nitrogen (?196°C ) and in boiling pentane (36.1°C). The separate pressures are 0.349 atm and 1.442 atm. Hint: Use the linear relationship P = A + BT, where A and B ..
An auto of mass 1500 kilogram is coasting at 16 m/s at the top of a hill. determine how high is the hill
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