Physics, 21.04.2020 15:54 lilyella1004
Two disks are mounted (like a merry-go-round) on low-friction bearings on the same axle and can be brought together so that they couple and rotate as one unit. The first disk, with rotational inertia 3.76 kg·m2 about its central axis, is set spinning counterclockwise (which may be taken as the positive direction) at 436 rev/min. The second disk, with rotational inertia 9.20 kg·m2 about its central axis, is set spinning counterclockwise at 953 rev/min. They then couple together. (a) What is their angular speed after coupling? If instead the second disk is set spinning clockwise at 953 rev/min, what are their (b) angular velocity (using the correct sign for direction) and (c) direction of rotation after they couple together?
Answers: 2
Physics, 22.06.2019 04:40
Argon is adiabatically compressed from an initial volume of 16 liters to a final volume of 2 liters. by what factor do the following quantities change? do they increase or decrease? (a) the rms speed (b) the thermal energy of the gas (c) the molar specific heat cv (d) the pressure
Answers: 3
Physics, 22.06.2019 08:00
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 11:30
If forces acting on an object are unbalanced. true or false
Answers: 1
Physics, 23.06.2019 05:40
What is the change in internal energy if 20 j of heat is released from a system and the system does 50 j of work on the surroundings? a. -70 j b. 30 j c. -30 j d. 70 j
Answers: 2
Two disks are mounted (like a merry-go-round) on low-friction bearings on the same axle and can be b...
Chemistry, 04.11.2020 08:00
Mathematics, 04.11.2020 08:00
Mathematics, 04.11.2020 08:00
English, 04.11.2020 08:00
Chemistry, 04.11.2020 08:00
Mathematics, 04.11.2020 08:00
Social Studies, 04.11.2020 08:00
History, 04.11.2020 08:00
Mathematics, 04.11.2020 08:00
Mathematics, 04.11.2020 08:00
English, 04.11.2020 08:00