1
Which of the following is a FALSE statement?
A
Heat moves through solids by conduction.
B
Molecules move faster in warmer substances.
c
Warm water is denser than cold water.
D
Heat moves through liquids and gases by convection.

"Warm water is denser than cold water. " - is false

Explanation:

Because cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density. Hot water is less dense and will float on room-temperature water. Cold water is more dense and will sink in room-temperature water.

a. formula: f=ma or f/m=a

10,000n/1,267kg≈7.9m/

b. formula: a= and s=d/t

speed= 394.6/15

s=26.3m/s

a=

a=1.75m/

c. 7.9-1.75=difference of 6.15m/

d. the force that most likely caused this difference is friction forces