Can someone please help me?
Hello,
Can you please explain the task to me
I don't understand it
Thanks
Greetings! In the following sketch, I don't understand why the focal point, i.e., the point where the light rays intersect in a converging lens, is in the camera lens? Where I expect the lens to be, the camera's film or sensor is. Sketch 1 The green lines intersect in a lens. And the orange sensor…
We have learned that R = U/I or [R] = V/A but I don't understand why the resistance, i.e. how strongly a conductor resists the electric current, has to be specified depending on the current strength? Wouldn't it be enough to say by how much the voltage decreases?
Hello GuteFrage Community, What is the thermal conductivity W/(m*K) of down feathers? Best regards skillZnosK
I have a question about zeolite-water cooling through evaporative cooling. A well-known example of this type of cooling is the self-cooling beer keg. It states that 5 kg of zeolite and approximately 1 liter of water cool a 20-liter keg of beer at a cooling rate of approximately 0.5 K/min. My question is, can the…
What voltage in the power grid is actually fixed? We say 230 volts from each outer conductor to ground and 400 volts between the outer conductors. The conversion factor is square root (3). But 230V times root(3) only gives 398.4 volts. Or 400V divided by root(3) gives 230.94. So which of the two voltages is…
I've been given some questions in preparation for a test, and I don't understand two of them. Perhaps you could help me and tell me the solution so I can get a good look at the solution and have an example. That would be really nice 🙂 thank you:))
Alpha case: The atomic nucleus emits a helium nucleus
Beta-minus decomposition: In the atomic nucleus a neutron transforms into a proton and emits an electron.
Beta-plus decomposition: In the atomic nucleus, a proton transforms into a neutron and emits a positron.
Thank you