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A portion of audio equipment is said to have a signal-to-noise ratio of 58 dB. Determine the ratio of intensities of the signal and the background noise?
A light, rigid rod of length l = 1.00 m joins two particles, with masses m1 = 4.00 kg and m2 = 3.00 kg, at its ends. Determine the angular momentum of the system
q1. a basketball player achieves a hang time of .658 s in dunking the ball. what vertical height will he attain? the
A grandfather clock is controlled by a swinging brass pendulum that is 1.2 m long at a temperature of 21°C. What is the length of the pendulum rod
An airplane is flying through a thundercloud at a height of 2400 m. (Flying at this height is very dangerous because of updrafts, what is the electric field at the aircraft
You fly from Boston's Logan Airport, at sea level, to Denver, at an altitude of 1.6 . Take your mass as 69 and the zero of potential energy at Boston. What is your gravitational potential energy in Denver
Battery-powered electricity is very expensive compared with that available from a wall receptacle. Estimate the cost per kWh of an alkaline D-cell
A loudspeaker of mass 22.0 {rm kg} is suspended a distance of h = 1.60 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.90 {rm m}.
a marble spins in a vertical plane around the inside of a smooth 20-cm-diameter horizontal pipe. the marbles speed at
A 2 kg rock is released from rest at a height of 29 m. neglect air resistance and determine the kinetic energy, gravitational potential energy, and total mechanical energy at each of the following heights: 20m; 15m; 5m; 9m.
The lowest pedal note on a large pipe organ has a fundamental frequency of 16 Hz, What is the length of the open-closed pipe that makes that note
The star nearest the earth (the sun) radiates the most energy at a wavelength of 470 nm. What is the temperatures of the sun's outer layer, the photosphere
A converging lens of focal length 7.550cm is 20.5cm to the left of a diverging lens of focal length -6.50cm, Find the magnification of the coins final image
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