Which term describes electrons being ejected from a metal surface that light is shining on? a. emission spectra b. blackbody radiation c. photoelectric effect d. ultraviolet catastrophe

The mass of the sun is 1.99×1030kg and its distance to the earth is 1.50×1011m. what is the gravitational force of the sun on the earth?

Sort the images based on whether there's a force of attraction or repulsion between the magnets shown. attraction repulsion

In 1859, charles darwin published the first edition of on the origin of species, which explained his observations of various groups of animals that showed great similarities but minor differences. darwin concluded that if a population of one species separates into two different populations that live in separate locations, then over the course of many generations the different populations can develop into different species. this idea predicted many future biological findings and became the basis of modern biology. darwin’s explanation for why different species exist is best described as a(n) law. theory. inquiry. hypothesis.