Consider just the first sentence of this multistep word problem. sentence 1: the sum of the ages of a brother and sister is 26. give an equation that represents this statement using b as the age of the brother and s as the age of the sister. express your answer in terms of the symbols b and s.

Which statement about sound is not true? a. air particles travel with sound waves. b. sound waves cannot travel through a vacuum. c. sound waves exist even if no one hears them. d. air particles vibrate along the path of a sound wave.

What is the equation fort the alkaline zinc/manganese dioxide cell. a) anode b)cathode c)overall equations.

6) (a) calculate the absorbance of the solution if its concentration is 0.0278 m and its molar extinction coefficient is 35.9 l/(mol cm). the depth of the cell is 5 mm. (b) what is the %t? (7) calculate the absorbance of the solution if the transmitted light intensity is 70% of the initial light beam intensity