Recent content by katyross

Homework Statement " Which of the following best describes a weak acid?" A. Its 0.10 M solution will have a pH = 1.00 B. It may be very soluble, but only partly ionized. C. It must be very soluble and completely ionized D. It must be of low solubility and completely ionizedHomework Equations...

Homework Statement "A race car driver must average 180 km/h for 4 laps to qualify for a race. Because of engine trouble, the car averages only 150 km/h over the first 2 laps. What speed must be maintained for the last 2 laps?" Homework Equations v= d/t The Attempt at a Solution i...

v = d/t t= d/v (4.5-t) = 50/330 ?

how would you fit that into the formula to find the speed of the rock?

Homework Statement "A rock thrown horizontally at a large bell 50m away is heard to hit the bell 4.5 seconds later. If the speed of sound is 330m/s, what was the speed of the rock? (Disregard the effect of gravity.) [Hint: If it requires a time of t for the sound to return, then it requires...