A student is collecting water as it runs into a measuring cylinder. She uses a clock to measure the time interval between measurements. The level of the water in the cylinder is shown two times, together with the clock at these times-water level at 10.5cm3 at 12 seconds and water level 70cm3 at 43 seconds a)the volume of the water
b) The time interval

he . if i may ask what i your question exactly?

explanation:

uranium fissions/breaks up giving out energy and neutrons

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me