Which of the following is not a green house gas

a. water
b. carbon dioxide
c. nitrous oxide
d. propane

Water is not considered a greenhouse gas. A greenhouse gas is a certain type of gas which is harmful to Earth’s atmosphere. Water does not have a negative effect, therefore it does not classify as a greenhouse gas.

12000j is work done

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be