How much ice is melted per second
A silver bar of length 30 cm and a cross-sectional area 1.o cm2 is used to transfer heat from a 100oC reservoir to a 0oC block of ice. How much ice is melted per second? (For silver, k= 427 J/s.m.oC. For ice, Lf= 334000 J/kg.)
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The probabilities that an adult man has high blood pressure and/or high cholesterol are shown in the table. Are high blood pressure and high cholesterol independent? Explain.
A 5-g lead bullet traveling in 20oC air at 300 m/s strikes a flat steel plate and stops. What is the final temperature of the lead bullet? (Assume the bullet retains all heat) The melting point of lead is 327oC.
A survey of prices for external disk drives found the accompanying data, where 1 TB=1000 gigabytes. Some reseach on the prices discovered that the 210 Gb hard rive was a special "hardened" drive designed to resist physical shocks.
You have a 1 liter container which contains 0.5 liters of water at 25 degrees celsius that is sealed. You then add 1 μg of phenanthrene to the water. The phenanthrene has a K' H of 0.001 and a log KOW of 4.46 at 25 degrees celsius.
In the titration of acetic acid and NaOH titration the use of the color indicator mandates that excess base be added in order to detect the reaction endpoint.
If you found this clock running too slowly, explain how would you adjust the circuit parameters to make it run faster?
The surface of the sun is at approximately 5700K and the temperature of the earth's surface is about 290K. What is the total entropy change occurs when 1000J of heat energy is transferred from the sun to the earth.
Water is the working fluid in an ideal regenerative Rankine cycle. Determine for the cycle amount of steam extracted to the open feed heater.
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