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the light bulb used in a projector has a resistance of 28 ohms when operating on 104 volts. What is the bulbs power consumption?
An astronomical telescope uses an objective power of +1.280 D. If the length of the telescope is 80.000 cm, what are power of the eyepiece
what time delay Delta t is necessary. A boxcar of mass 600 tons at rest becomes uncoupled on a 5.00 grade. If the track is considered to be frictionless, what speed does the boxcar have after 15 seconds.
How kinetic energy is related to linear momentum and What is the difference between elastic and inelastic collisions
Three forces act on an object. A 2 N force acts due east and a 3 N force acts due north. If the net force on the object is zero, what is the magnitude of the third force?
A loudspeaker at the origin emits a 140Hz tone on a day when the speed of sound is 340 m/s. What is the distance between these two points
Let the x axis be parallel to the ground, +y direction be vertically upward, and take as an origin the point on the ground directly below the top of the ramp.
he car is suspended beneath the helicopter by a steel cable. Illustrate what is the lift force exerted on the air by the helicopter's rotor?
The first-order bright fringe is a distance of 4.84 from the center of the central bright fringe. For what wavelength of light would the first-order dark fringe be observed at this similar point on the screen.
A 1.85m diameter wagon wheel makes one revolution in 3.45s. What is the tangential speed of a point in it's rim
A wave has an angular frequency of 110 rad/s and a wavelength of 1.80 m. Calculate the angular wave number and the speed of the wave.
a bar magnet is dropped through a loop of wire, what is the direction of the current at the instant it is in the middle
A refrigerator has a coefficient of performance equal to 6.00. The refrigerator takes in 150 J of energy from a cold reservoir in each cycle, Find the work required in each cycle
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