According to the law of conservation of matter, which chemical equation represents a possible chemical reaction? a. caco3 fe2o3 b. 2na + cl2 2nacl c. 4fe + 3o2 c6h12o6 + 6o2 d. c6h12o6 + 6o2 cao + co2

Amass attached to a spring is displaced from its equilibrium position by 5cm and released. the system then oscillates in simple harmonic motion with a period of 1s. if that same mass–spring system is displaced from equilibrium by 10cm instead, what will its period be in this case? a mass attached to a spring is displaced from its equilibrium position by and released. the system then oscillates in simple harmonic motion with a period of . if that same mass–spring system is displaced from equilibrium by instead, what will its period be in this case? a) 0.5sb) 2sc) 1sd) 1.4s

Abowling ball rolling down the lane toward the pins has gravitational potential energy. a. no b. a lot of c. a little

Which symbol in the first law of thermodynamics represents the sum of the chemical and thermal energy stored in atoms and molecules? a. q b.w c.v d.u