The density of mercury is 13.6 g/mL What is the mass in kilograms of 5L of mercury?

Which of the following is a testable hypothesis? a. if i brush my teeth, i will get fewer cavities than if i don't brush my teeth. b. green toothpaste tastes better than blue toothpaste or red toothpaste. c. smart, careful, healthy people always brush their teeth. d. it's wrong to not brush your teeth before you have an important conversation with someone.

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

Is a pencil falling to the floor anon contact force, a force, or a contact force