What is the potential energy of a 2000 N bell at the top of a 20 m tower? 100 Joules

40, 000 Nm

400, 000 J

4000 Joules

Science and technology are interdependent. advances in one lead to advances in the other. give an example of this phenomenon.

Which atomic model was proposed as a result of j. j. thomson’s work?

Exercise 2. find the wavelength of a photon emitted when an electron jumps from the n = 3 energy level down to the n = 2 energy level. where is this photon in the electromagnetic spectrum?