Answer:
At light intensity I = 3, is P a maximum
Explanation:
Given:

now differentiating the above equation with respect to Intensity 'I' we get

or

or

or

Now for the maxima 
thus,

or

or

or

or
I = 3
thus, <u>for the value of intensity I = 3, the P is maximum</u>
at I = 3

or

or

The force that one massive object exerts to attract another object is called gravity or gravitational pull.

Initial velocity of a car is 36 km/h . Find the distance after min, if it goes with acceleration 2 m/s².

Initial velocity, u = 36 km/h

Time, t = 1min
Acceleration, a = 2m/s²
Apply 2nd equation of motion

Answer: A forest fire could affect the geosphere by ash and the heat from the fire, but the fire would affect the biosphere by less oxygen in the air and would make it hard for human to breath affecting climate change. Also many homes to wildlife that live in the forest would lose their homes. This would result in lose of money from no hunting and that affect the economy.