Q1. A fuel pump sends gasoline from the car's fuel tank to the engine at a rate of 6.34 x 10-2 kg/s. The density of the gasoline is 735 kg/m3, and the radius of fuel line is 3.19 x 10-3 m. What is the speed at which the gasoline moves throughout the fuel line?
Q2. Two children setup a "telephone" by placing a long, slender aluminium (Y = 6.9 × 1010 N/m2) bar that has a length of 6.1-m between their two houses. To communicate, the child taps a coded message on one end. How long do the sound waves take to reach the other end?