Which of the following statements best describes a difference between mechanical waves and electromagnetic waves?
a. mechanical waves can produce colored light, while electromagnetic waves cannot.
b. mechanical waves can travel in any direction, while electromagnetic waves travel only in one direction.
c. mechanical waves travel only through a medium, while electromagnetic waves can also travel through a vacuum.
d. mechanical waves travel only at the speed of light, while electromagnetic waves can travel at many different speeds.

One of the cell membrane's functions is to protect the cell keep wastes in the cell create new cells keep light out of the cell

Part b: study of equilibrium on solubility: mg(oh)2(s) ⇌ mg2+(aq) + 2 oh–(aq) cloudy clear (pink) 7. a. b. 8. a. b. 9. 10. 11. 12. when adding concentrated hydrochloric acid, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 7a. you should indicate which ion was added to or removed from the equilibrium mixture. when adding edta, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 8a. you should indicate which ion was added to or removed from the equilibrium mixture. upon heating in which direction is the equilibrium shifting? upon cooling in which direction is the equilibrium shifting? is the forward reaction a. endothermic explain your answers to questions 9, 10, and 11. (l) left (r) right (l) left (r) right b. exothermic

Answer asap need by wednesday morning calculate the ph of 0.16m ch3cooh which has ka = 1.74 x 10-5 mol dm-3 best answer will be brainliest