Which of the isotopes are radioactive? check all that apply. hydrogen-1 hydrogen-3 helium-4 carbon-14 uranium-235 copernicium-277 fermium-252 carbon-12

What would you do if you told the guy you liked that you liked him

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

Which description best characterizes the motion of particles in a solid?