Light from sun falling on a convex lens will converge at a point called A centre of curvature
B focus C radius curvature D optical centre

The formation of a solid, also known as a is an indication of a chemical change. precipitate particulate particle powder

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?

Structure of the atoms: discovery of the nucleus in 1909i need answering all of these questions