80 i need a step by step simple experiment to show that light travels in straight lines until at a point were it enters a new medium.

Which object forms when a supergiant runs out of fuel? a red giant a black hole a white dwarf a neutron star

What is the correct term for living the most sustainable life you can within your current circumstances?

He table below gives the atomic mass and relative abundance values for the three isotopes of element m. relative abundance (%) atomic mass (amu) 78.99 23.9850 10.00 24.9858 11.01 25.9826 what is the average atomic mass (in amu) of element m? 2.86 5.36 24.30 24.98