Question
Rocket works on the principle of which one of the
following?Solution
A rocket works on the principle of momentum conservation. According to Newton's third law of motion, every action has an equal and opposite reaction. In the context of rockets, when the rocket engine expels propellant gases out the back at high speed (action), the rocket itself is pushed forward (reaction). This is the conservation of momentum: the momentum lost by the gases being ejected backward is gained by the rocket moving forward.
Which of the following option is incorrect about the “PM- POSHAN Scheme”?
United States will declare which country as the world’s worst offenders in human trafficking and forced labor?
Income of A is twice the income of B. B and A spend 60% and 70% respectively of their incomes. Find the savings of A, if B saves Rs. 15000 in a month.
Select the correct balanced reaction for CuO + NH₃ → Cu + N₂ + H₂O.
Which of the following is the characteristic of striated muscles?
Which one of the following is hardware?
A clock seen through a mirror shows ‘quarter to seven’. What is the correct time shown by the clock?
Which of the following numbers will replace the question mark (?) in the given series?
3, 7, 13, 21, 31, ?
Read the given statements and conclusions carefully. You have to take the given statements to be true even if they seem to be at variance from commonly ...
Which country’s universities is going to set up its campuses at the GIFT CITY ?
