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| Questions:
TimeLeft: Posted: |
Physics
How much heat must be added to 40.0 g of aluminum at 20.0°C to raise its temperature to 127.0°C?
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Mar 9th |
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A cello string vibrates in its fundamental mode with a frequency of 144 l/s. The vibrating segment is 104.6 cm long and has a mass of 1.03 g. Find the more... |
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Mar 1st |
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What is the time lapse between seeing a lightning strike and hearing the thunder if the lightning flash is 27 km away? The speed of light waves in air more... |
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Mar 1st |
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The distance from knee to the hip is 55 cm. The weight of that part is 9 kg. The distance from knee to the foot is 45 cm. The weight of that part is 5 more... |
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Feb 27th |
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When a sound from a source is refracted away from the surface of the earth, it gives an indication that the more... |
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Feb 24th |
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what is the heat allocated too the external work of the gas in an adiabatic expansion occuring to 125 pounds of a gas in a confined space when the gas more... |
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Feb 6th |
how much heat is required to convert 0.3 kilogram of ice at 0 degrees to water the same temperature
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Jan 30th |
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what are the symptoms of a PCV valve stuck in the open position? more... |
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Jan 13th |
25. Through which one of the following mediums is the velocity of a sound wave the greatest?
A. Steel
B. Lead
C. Water
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Jan 1st |
24. In a stringed musical instrument, the sound frequency of a particular string can be increased by
A. lengthening the string.
B. loosening more... |
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Jan 1st |
23. If a person is in front of a smooth surface from which a sound is reflected, the person would hear a sound that
A. has a higher intensity th more... |
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Jan 1st |
22. The wavelength of a wave is the distance between
A. the amplitude and the normal position.
B. the crest and the following trough.
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Jan 1st |
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21. A surface receiving sound is moved from its original position to a position three times farther away from the source of the sound. The intensity more... |
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Jan 1st |
20. If a string vibrates at the fundamental frequency of 528 Hz and also produces an overtone with a frequency of 1,056 Hz, this overton more... |
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Jan 1st |
19. Rarefaction occurs only in a _______ wave.
A. longitudinal.
B. transverse.
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Jan 1st |
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