Hydrogen produces a spectral line at 400nm. oxygen produced a spectral line at 374.8nm. If you detected a galaxy with a spectral line at 384.8nm what […]
research on the short-term and long-term effects that tobacco products have on teenagers and adults, along with the impact smoking and tobacco related products have on […]
Topic 1: Sustainable energy development means an energy policy and energy sources without harming the environment. Do you think this is possible? Explain. Topic 2: Considering […]