A stone of mass 2.6 kg is tied to the end of a string and is swung with constant speed around a horizontal circle with a radius of 0.52 m.
If it makes two complete revolutions each second, its acceleration is:.
a. 82.11 m/s^2
b. 42.70 m/s^2
c. 5.13 m/s^2
d. 6.54 m/s^2
e. 20.53 m/s^2
Answers: 1
Physics, 21.06.2019 23:10, itzlianne
A248-g piece of copper is dropped into 390 ml of water at 22.6 °c. the final temperature of the water was measured as 39.9 °c. calculate the initial temperature of the piece of copper. assume that all heat transfer occurs between the copper and the water. remember, the density of water is 1.0 g/m
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Physics, 22.06.2019 01:00, Bearboy1564
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Physics, 22.06.2019 08:00, booitsmrradl3385
While studying chemical reactions and conservation of matter, sarah's class conducted a variety of experiments. sarah and her lab partner found the mass of a wax candle and placed the candle in a flask. the students lit the candle and let it burn to completion. all that was left was wax and charred candle wick. per their teacher's instructions, the students found the mass of the products. their data can be seen in the data table. formulate a hypothesis the students could test to explain why the experiment did not support the law of conservation of matter. a) the students could repeat the experiment using different candles; there might have been a flaw in the candle. b) the experiment should be repeatable. the students should run several trials and then take an average of the after mass in each trial. c) the students should have someone in the class check their measurement skills as they repeat the experiment. they may have made an error using the balance. d) the students should burn the candle in a container that has some type of lid so that any gas that is a product of the reaction can be contained and massed. submit
Answers: 2
Physics, 22.06.2019 09:00, atsuedem974
Chemical energy is a form of energy. a. heat b. kinetic c. potential d. electromagnetic
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A stone of mass 2.6 kg is tied to the end of a string and is swung with constant speed around a hori...
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