Answers: 3
Physics, 21.06.2019 22:30
How many molecules are present in 3 mols of silicon dioxide (sio2)?
Answers: 1
Physics, 21.06.2019 23:20
Imagine you had to physically add electrons, one at a time, to a previously neutral conductor. you add one electron very easily, but the second electron requires more work. in your initial post to the discussion, explain why this is. also, what happens to the work needed to add the third, fourth, fifth, and subsequent electrons
Answers: 1
Physics, 22.06.2019 10:30
An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.
Answers: 2
Physics, 22.06.2019 10:50
Asheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200oc and is permitted to achieve a steady-state diffusion condition. the diffusion coefficient for nitrogen in steel at this temperature is 6 x 10- 11 m2 /s, and the diffusion flux is found to be 1.2 x 10-7 kg/m2 -s. also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3 . how far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3 ? assume a linear concentration profile.
Answers: 3
If 56 grams of carbon monoxide burns in oxygen to produce 88 grams of carbon dioxide, the mass of ox...
Mathematics, 31.01.2020 16:58
Mathematics, 31.01.2020 16:58
Mathematics, 31.01.2020 16:58
Mathematics, 31.01.2020 16:58
History, 31.01.2020 16:58
English, 31.01.2020 16:58
Mathematics, 31.01.2020 16:58
Biology, 31.01.2020 16:58
English, 31.01.2020 16:58
Mathematics, 31.01.2020 16:58