A boy standing some distance from the foot of a tall cliff claps
his hands and hears an echo 0.5s
later. If the speed of sound is
340ms-1, how far is he from the
cliff?
O A. 17m
O B. 34m
O C.85m
O D. 170m

falling water hydro = water .. spectcular places these plants are

ok

explanation:

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.