I’m not really good at balancing chemical equations but I suggest you search Balance Chemical Equation - Online Balancer. This website will help you balance the equations you have. Hope this helps a little
This was because the experiment showed that a substance could emit radiation even while it was not exposed to light.
My educated guess should be the 3rd one
It is a physical separation.
Only chemical separation involves the changing of substances and their bondings, which usually involves the use of heat or electricity. Meanwhile, physical changes does not require breaking the bonds of substances or changing a substance to another, common examples of physical separations are such as filtration or distillation.
Since straining pasta from water does not require breaking the pasta or water to other substances, plus heat and electricity is not involved, therefore this is a type of physical separation.
