QUESTION: answer this: who built the jantar mantar observation in jaipur and delhi??

ANS: Sawai Jai Singh II

QUESTION: answer this: who showed that mass and energy are related??

ANS: Albert Einstein

QUESTION: answer this: sequel to the book holes by louis sachar??

ANS: Small Steps

QUESTION: answer this: who wrote the publication common sense encouraging the colonists to revolt against great britain??

ANS:
Thomas Paine