Breaking rocks into pieces increases the rate at which the rock will weather chemically because breaking the rock exposes more surface area to weather.
Opaque, if we are talking about a one-way mirror ;)
If joey ran 60 meters in 10 seconds, then his velocity is 6 m/s
Answer:
(v2 - v1) / t = a for uniform acceleration
a = (10.5 - 15) / 4 = -1.125 m / s^2
T = 15 / 1.125 = 13.3 s time for train to stop from 15 m/s
S = V0 T + 1/2 a T^2
S = 15 * 13.3 - 1.125 / 2 * 13.3^2
S = 199.5 - 99.5 = 100 m
They become charged particles called ions.
