Heat must be removed to cool and freeze the water
An ice cube tray holds 515 g water. If the water initially has a temperature of 21°C, how many kilojoules of heat must be removed to cool and freeze the water at 0°C?
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The leathal inhalation does of sarin for a 200 pound person has been determined to be .0015mg. Determine the LD50 of Sarin that researchers used to calculate the leathal inhalation dose?
A steel tape is used to measure a distance of 20 m at a 10 0C. Assuming that the tape will measure the true distance when the temperature is 20 0C.
A company has two buildings that are 50 meters apart. Between the buildings is private land owned by the company. A large walk-through tunnel connects the two buildings. In one building is a collection of 30 computer workstations, and in the o
The cadmium ion was then masked by using an HCN/NaCN buffer to bring the pH of a second 25.00mL aliquot to 10; 32.70mL of the 0.01080M EDTA standard was used in this titration and involved only the Pb^2+. Calculate the respective percentages of le
What volume of O2 will form in 66.4 seconds at a barometric pressure of 703.0 . (The vapor pressure of water at this temperature is 17.5 )
A 155 gram sample of copper was heated to 150 degrees Celsius then placed into 250 gram of water at 19.8 degrees Celsius. Calculate the final temperature of the mixture.
A 12 kN force is exerted on a rocker arm. The moment of inertia (I) of the crosssection with respect to the neutral-axis is 43.3x10-9 m4.
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