The expression for mean free path is:

• A. λ = KT / √2 π d² P
• B. λ = π d P / k T
• C. λ = π d² P / k T
• D. λ = k T / π d P

Your parents are going to buy a house. They have been offered one on the roadside and another three lanes away from the roadside. Which house would you suggest your parents should buy? Explain your answer.

You pull your hands back while catching a fast moving cricket ball. Which law is used to explain it?

• A. law of inertia
• B. Newton’s second law of motion
• C. Newton’s first law of motion
• D. Newton’s third law of motion

Three properties of Neutron:

• Neutrons have no electric charge, making them neutral particles.
• They have a mass slightly greater than that of protons.
• Neutrons are found in the nucleus of an atom, alongside protons.

Write the energy transformation in the following

• Dynamo
• Solar Cell

Which orbital notation does not have spherical node______.

• a. n = 2, l = 0
• b. n = 2, l = 1
• c. n = 3, l = 0
• d. n = 3, l = 1