Ababy stroller is a rest on top of a hill which is 10 m high. the stroller and baby have a mass of 20 kg. what is the potential energy of the baby and stroller? formula: pe = m g h (gravity near earth is 9.8 m/s²)

Potential energy (PE) = mgh

mass of stroller and baby  = 20 Kg

PE = 20 Kg x 9.8m/s^2 x 10 m

= 1960 kg m^2/s^2

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

hope it ,

bioteacher101

copper and glass have high electrical conductivity