Question

1.thermal conduction takes place in:
(a)solids only
(b)liquids only
(c)gases only
(d)solids,liquids and gases
2.evaporation always causes:
(a)thermal expansion
(b)liquification
(c)cooling down
(d)all of these
3.what will have more impact on kinetic energy:doubling mass or doublngvelocity?
4.

Answer 1

Ans 1 is solids, liquids and gases
Ans 2 is cooling down
Ans 3 is doubling velocity since KE = 1/2 mv²

if mass is doubled, it doubles KE on the other hand if velocity is doubled it makes the KE 4 times.