It's possible to boil water by adding hot rocks to it, a technique that has been used in many societies over time. if you heat a rock in the fire, you can easily get it to a temperature of 500∘c. if you use granite or other similar stones, the specific heat is about 800 j/(kg⋅k).if 5.0 kg of water at 10∘c is in a leak-proof vessel, what minimum number of 1.0 kg stones must be added to bring the water to a boil?

6

Explanation:

m = Mass

c = Specific heat

= Change in temperature

s denotes stone

Heat is given by

Heat for the stone

Number of stones is given by

The number of stones is 6

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

well, you would divide 135 by 33 to get your answer. then that is how many seconds it would take. boardman should fly about 132 m or 4.090909090909091 seconds.