HARD
9th CBSE
IMPORTANT
Earn 100

Starting from a stationary position, Anil paddles his bicycle to attain a velocity of 10 m s-1 in the 25 s. Then he applies brakes such that he again comes to rest after next 50 s. Calculate the acceleration of the bicycle in both cases. Also, find the total distance covered by Anil.

Important Questions on Practice Paper 2

EASY
9th CBSE
IMPORTANT
What would happen if carbon dioxide content of the atmosphere increases?
MEDIUM
9th CBSE
IMPORTANT
What is the role of nitrogen fixing bacteria?
EASY
9th CBSE
IMPORTANT
What is the contribution of photosynthesis in carbon cycle?
EASY
9th CBSE
IMPORTANT
Give the name of two air pollutants.
EASY
9th CBSE
IMPORTANT

Calculate the number of atoms in 

(i) 52u of He

EASY
9th CBSE
IMPORTANT

Calculate the number of atoms in 

(i) 52 g of He

EASY
9th CBSE
IMPORTANT

Calculate the number of atoms in 

(i) 52 moles of He 

EASY
9th CBSE
IMPORTANT
State the law of conservation of mass. Illustrate the law with an example.