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  • diameter and sound power?

    Assuming that the diameter of the eardrum is 1 cm, what is the sound power received by the eardrum at the (a) threshold of hearing and (b) the threshold of pain.

    1 AnswerPhysics1 decade ago
  • Condensation and entropy?

    A process involves 0.50 kg of steam condensing to water @ 100°C. The change in entropy of the system is:

    (a) Positive

    (b) Zero

    (c) Negative

    Why?

    What IS the change in entropy of the steam?

    2 AnswersPhysics1 decade ago
  • isothermal expansion and entropy?

    In an isothermal expansion at 27°C, an ideal gas does 30 J of work. What is the change in entropy of the gas?

    1 AnswerPhysics1 decade ago
  • Thermodynamics and entropy?

    In the winter, heat from a house with an inside temperature of 18°C leaks out at a rate of 20000 Joules per second. The outside temperature is 0°C. (a) What is the change in entropy per second of the house? (b) What is the total change in entropy per second of the house-outside system?

    1 AnswerPhysics1 decade ago
  • Thermodynamics and gases?

    A rigid container contains 1.0 mol of an ideal gas that slowly receives 2.0 × 10^4 J of hear.

    Is the work done by the gas

    (a) Positive

    (b) Zero

    (c) Negative

    Why?

    Is a net amount of hear added to or removed form the system and how much is involved?

    1 AnswerPhysics1 decade ago
  • Pressure Depth and Volume?

    A diver releases an air bubble of volume 2.0 cm³ from a depth of 15 m below the surface of the lake, where the temperature in 7.0°C. What is the volume of the bubble when it reaches just below the surface of the law, where the temperature is 20°C.

    I know that the answer is 5.1 cm³, but what are the steps to reach the answer?

    2 AnswersPhysics1 decade ago
  • Buoyancy..HELP?

    A block of iron quickly sinks in water, but ships constructed of iron float. A solid cube of iron, 1.0m on each side is made into sheets. To make these sheets into a hollow cube that will not sink in water, what should be the minimum length of the sides of the sheets?

    1 AnswerPhysics1 decade ago
  • Another Buoyancy and Weight Problem?

    As steel cube 0.30 m on each side is suspended from a scale (that measure's weight in Newtons) and completely immersed in water. What will the scale read?

    Note: the density of steel 7800 kg/m^3

    1 AnswerPhysics1 decade ago
  • Buoyance and Weight Problem?

    An object has a weight of 8.0 N in air. However, it weighs only 4.0 N in water when it is completely submerged. What is the object's density?

    2 AnswersPhysics1 decade ago
  • The Great Gatsby - rhetorical devices?

    What rhetorical device is used in the following quote from the Great Gatsby, Chapter 8 :

    "I have an idea that Gatsby himself didn’t believe it would come and perhaps he no longer cared. If that was true he must have felt that he had lost the old warm world, paid a high price for living too long with a single dream. He must have looked up at an unfamiliar sky through frightening leaves and shivered as he found what a grotesque thing a rose is and how raw the sunlight was upon the scarcely created grass. A new world, material without being real, where poor ghosts, breathing dreams like air, drifted fortuitously about…like that ashen, fantastic figure gliding toward him through the amorphous trees."

    1 AnswerHomework Help1 decade ago
  • South Park Copyright Infringement?

    I am a high-school student and I'm in a class about web designing and while working in Adobe/Macromedia Flash and I re-created a scene from South Park which shows the four boys at the bus stop and my teacher says i can't use these images because they are infringing copyright laws. I know that she's completely wrong and stupid for saying such a dumb thing, but can someone point me to a credible source that clearly shows that I am not, in fact, infringing copyrights.

    7 AnswersLaw & Ethics1 decade ago