Asupersonic aircraft consumes 5320 imperial gallons of kerosene per hour of flight and flies an average of 14 hours per day. it takes roughly seven tons of crude oil to produce one ton of kerosene. the density of kerosene is 0 965 g/cm . how many planes would it take to consume the entire annual world production of 4 02 10 metric tons of crude oil?

5320*14= 74480 gallons. 
First let us convert gallons to cm^3 and we get 2.819374858x10^8 cm^3. 
We then multiply with density and then times 1000 to get it in terms of tons. 
Then multiply the number by 7 to get how many tons of crude oil a single plane uses in 14 hrs. 
Finally divide this by the production of crude oil. 

I got 4737 airplanes.

a coal burning power plant

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