Physics, 04.07.2019 22:30 abelxoconda
Time dilation in special relativity is a direct consequence of the postulate that the speed of light in vacuum is the same in all directions and in all inertial reference frames. 11. if sam on earth takes a spaceship and travels to outer galaxy with speed of 0.9c, sam himself can feel that his body's biological metabolism slows down compared to on earth 12. the first law of thermodynamics is valid both in reversible and irreversible processes. 13. a perfect black-body radiator emits radiation 4 times more, when its body temperature is doubled. 14. ideal gas systems do not have 'heat of transformation' (latent heat) 15. an ideal gas system initially at 20°c is doing work to the outside environment by expanding 0.1 m3. the work done by the system following an isothermal process is always larger than that followinga constant pressure process. 16. for a diatomic ideal gas system following the maxwell's speed distribution law, the root-mean square speed is the highest, followed by the average speed and then by the most probable speed. 17. the second law of thermodynamics suggests that the entropy of an ideal gas system is always increasing during an irreversible process. 18. the change in entropy of a thermodynamic system can be calculated even for an irreversible process, such as a free expansion.
Answers: 1
Physics, 22.06.2019 18:50, mariposa91
Avertical clean glass piezometer tube has an inside diameter of d = 1 mm and is used to measure pressure in a horizontal pipe carrying water as shown. due to pressure in the pipe, the water at 20c rises into the tube to a height h. if the water pressure in the pipe is p = 500 pa gauge, estimate the height h: (a) without considering surface tension (b) with surface tension (capillary) effects. the contact angle can be assumed at 30 deg
Answers: 2
Physics, 22.06.2019 19:30, CalCDanG
Assume that two of the electrons at the negative terminal have attached themselves to a nearby neutral atom. there is now a negative ion with a charge -2e at this terminal. what are the electric potential and electric potential energy of the negative ion relative to the electron? the electric potential and the electric potential energy are both twice as much. the electric potential is twice as much and the electric potential energy is the same. the electric potential is the same and the electric potential energy is twice as much. the electric potential and the electric potential energy are both the same. the electric potential is the same and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron. the electric potential is twice as much and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron.
Answers: 3
Physics, 23.06.2019 14:00, hilzepesqtatiana
Shows a map of olivia's trip to a coffee shop. she gets on her bike at loomis and then rides south 0.8mi to broadway. she turns east onto broadway, rides 0.8 mi to where broadway turns, and then continues another 1.2mi to the shop.
Answers: 1
Time dilation in special relativity is a direct consequence of the postulate that the speed of light...
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