You see a flash of lightning strike a clock tower during a thunderstorm. You count 2.5 s between when the lightning flashes and when you hear thunder with a sound level of 70 db. What is the sound level of the thunder for someone standing only 20 m from the clock tower

dec 23, 2016 - a load of bricks weighing 680 n a distance of 10 m across a parking lot. if if the worker pushes the cart with a constant force of 209 n, what work= force x distance = 220 n x 10 m = 2200 n.m = 2200 j i don't know where the person got it from, but the initial part, work= force x distance me.

snell's law

refractve index = sin incidence / sin refraction