A change in which property of light will have no effect on whether or not the photoelectric effect occurs? O frequency
O energy
O intensity
wavelength

Asample of radium-226 will decay 1/4 of its original amount after 3200years. what is the half-life of radium-226?

Consider the directing effects of the substituents on salicylamide and predict the possible structures of the iodination products. which do you think will be the major product?

Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?