A teacher attaches two slinky springs to a fixed support. The springs are moved, as shown in the image. Wave A wave B What property of the wave does the teacher change in the movement of each slinky? amplitude, frequency, speed, or wavelength

What is the atomic mass of an atom that has 6 protons, 6 neutrons, and 6 electrons? a) 6 b) 8 c) + 1 d) 12 e) 18

Classify this reaction: 2al+n2-> aln.

Essay-alternative energy sources research sources of energy that are being developed. write a report of 350-400 words discussing the information you learned concerning the development of various energy sources and the impact that you think they will have on your life. include sources cited at the end of your report using the mla format. follow the rubric guidelines. note that wikipedia is not an appropriate resource for a research paper. worth 99