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A certain telescope has an objective of focal length 1560 cm. If the Moon is utilized as an object, a 1.4 cm long image formed by the objective corresponds to what distance, in miles, on the Moon? Assume 3.8 multiplied by 108 m for the Earth-Moon distance.
w = 1
A closely packed coil of 500 turns carriers a current of 2.0 A. at what rate must the current change in order to induce an emf of 75V
A rocket in a fireworks display explodes high in the air. The sound spreads out uniformly in every directions. Compute the distance from the source at which the intensity is 0.80 x 10-6 W/m2
a swimmer capable of swimming at a speed of 1.87 ms in still water i.e. the swimmer can swim with a speed of 1.87 ms
a hotel elevator ascends 200 m with a maximum speed of 5.2 ms. its acceleration and deceleration both have a magnitude
A screen is placed 51.0 cm from a single slit, which is illuminated by light of wavelength 681 nm. If the distance among the first and third minima in the diffraction pattern is 2.90 mm, what is the width of the slit?
Light from an argon laser strikes a diffraction grating that has 5345 grooves per centimeter. Determine the wavelength of the laser light
A piece of wood (density: 0.12 g/cm3) with a mass of 30 gram in air is affixed to a lead sinker with a mass of 400 gram. Determine what will be the apparent mass of this system
At a recent rock concert, a dB meter registered 122 dB when placed 2.20 m in front of a loudspeaker on the stage. Determine the power output of the speaker
The magnetic field has been measured to be horizontal everywhere along a rectangular path x = 22 cm long and y = 5 cm high. Along the bottom the average magnetic field B1 = 1.3 10-4 tesla, along the sides an average magnetic field B2 = 1.0 10-4 te..
a uniform cylindrical turntable of radius 2.00 m and mass 26.8 kg rotates counterclockwise in a horizontal plane with
A 1kg ball is fastened to a string of length 1.5m. It can rotate at an average angular velocity of 10 rad/s. What is its moment inertia about the axis of rotation
A 13.49 g ball of putty traveling east at 6.75 m/s collided and sticks to another ball of putty of mass 23.81 g traveling north at 14.82 m/s
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