Number 4 I think
the atomic mass is 11 because the mass is the sum of protons and neutrons
Given: Mass m = 44 Kg; Velocity v = 10 m/s
Required: Kinetic energy K.E = ?
Formula: K.E = 1/2 mv²
K.E 1/2 (44 Kg)(10 m/s)²
K.E = 2,200 Kg.m²/s²
K.E = 2,200 J Answer is A
Because the top layer of a pool will be warmer than the bottom layer, that why filtration is important to cycle the water evenly.
Roughly 115,200 times a day
