How many grams of oxygen are present in a 0.10 g sample of adrenaline, a hormone secreted into the blood stream in times of stress? The formula of
adrenaline is C9H13NO3.​

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

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?