Physics, 04.06.2020 13:10 kritalewis
Water at the Antarctica usually exits as ice, making it very difficult to use the
water or conduct experiment requiring the water to be in liquid state. A coffee
addicted physicist stationed at a research base requires about 0.8 kg of ice for
his coffee on the hour.
a. How much heat is required to convert 0.8 kg of ice at —35 °C into steam
at 100°C? [5]
b. Plot the temperature – energy graph for the processes in (a). [5]
c. The surface tension of water was determined in a laboratory by using
the drop weight method. 100 drops were released from a burette the
inner diameter of whose opening is 1.8 mm. The mass of the droplets
was 3.78 g.
i. Determine the surface tension of the water and, comparing it
with the tabulated value, [6]
ii. Calculate the relative error of the measurements
Answers: 3
Physics, 22.06.2019 02:40, esheagustafson
What happens when chlorine reacts with bromine? a. electrons move from the chlorine atoms to the bromine atoms. b. electrons move from the bromine atoms to the chlorine atoms. c. electrons are shared between the chlorine atoms and the bromine atoms. d. electrons become delocalized among the atoms.
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Physics, 22.06.2019 07:10, cschellfamily
Road users moving into your lane, brake lights, and abrupt changes in road surface are a. rare at night b. indicators of potential hazards c. not worth worrying about before you reach them d. no problem for experienced drivers
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Physics, 22.06.2019 09:30, anytka21ovxqoa
How would a small bar magnet be oriented when placed at position x?
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Water at the Antarctica usually exits as ice, making it very difficult to use the
water or conduct...
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