Martes 0-9 What is Acceleration due to Gravity? Explain formula of relation between g & G and
find the value of g.
Q-10 What are weeds? Give the examples of weeds, need to control them and methods
to control them.

Explanation:

(9) Acceleration due to gravity is defined as the acceleration between two massive bodies when they are moving under free fall.

The relation between g and G is given by :

Where

G is universal gravitational constant

M is mass of the earth

r is distance

(10) The unwanted product that can toxify the crops are called weeds. To control weeds, a chemical called weedicides are sprayed in the field. Some other methods to control them are Ploughing or tilling of soil etc.

the answer is a. at the equator

the current is 0.6

voltage ÷ resistance = current

so 12 ÷ 20 = 0.6