कौन-सा शब्द 'ब्रह्मा'

For a system of particles, the center of mass moves:

Lines joining places of equal temperature are called 

With increase in impurities, the boiling point of water _________?

Which of the following is the most common cause of stomach ulcers?

A magnetic force does no work on a moving charged particle because:

A body of mass 4 kg falls freely from a height of 5 m. What is its kinetic energy just before it hits the ground? (Take g = 10m/s²)

A boy sitting in a train moving with a uniform velocity drops a coin outside. A man standing outside the train will find the trajectory of the coin to be -

A metal sphere is heated. Which property remains unchanged?

Stars in the sky appear to twinkle due to –

The force required to maintain an object at a constant velocity is