Question

q1) Convection takes place because...?
1-Free electrons make the heat energy travel faster in the fluid.
2-Hot liquid and cold liquid separates themselves from each other.
3-Hot fluid rises and colder fluid sinks.
4-Hot fluid sinks and colder fluid rises.

q2) Convection of heat cannot take place in
1- Alcohol
2-Bricks
3-Nitrogen
4-Paraffin

q3) We place air conditioners near the ceiling because
1-air blown from the top will fall to the ground due to gravity.
2-cold air can be found near the ceiling.
3-hot air rises to the ceiling and cooling it will create a convection current
. 4-cold air rises to the ceiling and cooling it will create a convection current.

q4) Sea breeze occurs
1-In the daytime.
2-in the night time
3-only at midnight
4-only when it rains

pls help me in these science questions.....

Answer 1

Answer:

1. a

2.Convection cannot take place in most solids because neither bulk current flows nor significant diffusion of matter can take place. Diffusion of heat takes place in rigid solids, but that is called heat conduction.

3.d

4.b

Explanation:

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