15POINTS What is acceleration? O A. A change in speed B. A change in speed or direction O C. A change in force O D. A change in force or energy​

H2so4(aq) + mg(s)—> mgso4(aq) +h2(g) which substance is the acid in the reaction?

Which of the following statements is true about planck’s law

What causes different colors to appear in the sky? the absorption of light by air molecules the reflection of light by bodies of water the greenhouse effect in earth's atmosphere the scattering and reflection of light by dust particles