Answer:
it is 27 degree.
Explanation:
because angle of reflection is equal to angle of Inc dence
its the the first one u said
you can collect water and shine a light though it and record your finings
Hi! the atom in this particular problem has emitted an alpha particle in a nuclear reaction.
Glad I could help, and happy learning!
Generally speaking, negative ions increase the flow of oxygen to the brain resulting in higher alertness, decreased drowsiness, and more mental energy.