Answer: A) 330/29 m/s Explanation: Second gun shot take 30 sec to reach rahul imples distance between two. given speed of sound = 330 m/s Now, distance = 330 m/s x 30 sec    Hence, speed of the bus = d/t = 330x30/(14x60 + 30) = 330/29 m/s.

Any person can have only 1 birthday i.e, the day he was born. And every year we celebrate it's anniversaries.

Answer: B) FALSE Explanation: Mushrooms are heterotrophs. They are not plants or autotrophs.   Every living thing that exists need energy in order to live. This energy ultimately comes from the sun, and only plants, or autotrophs, can directly use this energy to make food. Those organisms that cannot harness the sun's energy are known as heterotrophs.   Mushrooms belong to kingdom Fungi and are heterotrophs because they decompose and consume nutrients from the soil. They are not green so they cannot photosynthesize For this reason, mushrooms and all other fungi are heterotrophs.

Answer: D) The sequence of amino acids in the polypeptide chain differs from protein to protein Explanation:

Answer: D) the capacity of layers of metal ions to slide over the other Explanation:

Answer: A) a sovereign, socialist, secular and democratic republic Explanation: The Preamble was adopted with the constitution in the constituent assembly.   The Preamble proclaims the solemn resolution of the people of India to constitute India into a 'Sovereign socialist secular democratic republic'.

Answer: B) Poles Explanation:

Answer: B) Rousseau Explanation: The Five senses that we have are: Sight, smell, hear, touch and taste. Rousseau emphasised that "Senses are the gateways of knowledge".