November 24, 2014

Posts by Salem

Total # Posts: 6

A coal-fired electrical generating plant has an efficiency of 38%. The temperature of the steam leaving the boiler is 550 °C. What percentage of the maximum possible efficiency does this plant obtain? (Assume the temperature of the environment is 20 °C)
December 4, 2012

A radio station uses broadcasting at 600 kHz. What is the wavelength of the signals emitted by the station (speed of light c=3×108 m/s)
December 4, 2012

Water falls from a height of 84 m. Assuming that all the energy is converted into heat, the rise in temperature of water will be (4200 J/(kg °C) and g=10 m/s2)?
December 4, 2012

A 124- balloon carrying a 22- basket is descending with a constant downward velocity of 27.4 A 1.0- stone is thrown from the basket with an initial velocity of 20.0 perpendicular to the path of the descending balloon, as measured relative to a person at rest in the basket. The...
April 1, 2012

In the Odyssey, Part 2, what danger do Scylla and Charydbis pose to Odysseus and his crew?
February 24, 2010

social studies
what did the British goverment need to tax the coloines
February 22, 2010

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