What is a P. E diagram ?

Si una estrella no tiene paralaje medible, ¿qué puedes inferir?

Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils

No copying 15 pts how does a free-body diagram tell you about the net force on an object?