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
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Acup of coffee sits on the dashboard of an automobile. the car goes around a sharp curve. even though you hold the cup still, coffee still splashes out. this can best be explained due to a) density. b) friction. c) gravity. d) inertia.
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Physics, 22.06.2019 03:00
Standing side by side ,you and a friend step off a bridge at different times and fall for 1.6s to the water below.your friend goes first,and you follow after he has dropped a distance of 2.0m.when your friend hits the water,is the seperation between the two of you 2.0m or more than 2.0m? verify your answer with a calculation.
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Where is the potential energy throughout the loading, cocking, and releasing of the trebuchet?
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Water at the Antarctica usually exits as ice, making it very difficult to use the
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