For potassium metal, the work function φ (the minimum energy needed to eject an electron from the metal surface) is 3. 68 × 10−19 j. Which is the longest wavelength of the following which could excite photoelectrons?.

The graph shows a trend in an ecosystem over time caused by increased pollution in the region. what can you conclude from the graph? a. there’s lower biodiversity among birds. b. there’s a higher reproductive rate among birds. c. there’s a significant decline in the number of producers. d. other types of animals were unaffected by pollution.

Essay questions may also be referred to as a. talk questions c. hard questions b. explain questions d. think questions

In a cooking context,which of the following materials is the best heat conducter?