Questions

Find the potential energy gained by a body of mass 50 kg, if it is raised by 10m. (use g = 10 m/s2)

A compressed spring possesses more energy than a spring of normal length because the compressed spring has

The theory behind stars twinkling is that

A force of 20 N displaces an object through 2 m and does a work of 20 J. The angle between the force and displacement is

What is the technology used in a compact disc?

In a food chain, what is the difference between primary consumers and secondary consumers?

Which of the following is the largest satellite of the Solar System?

In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives.

And then, a few glorious minutes ______________, it was time to reluctantly head ashore. ____________ time, the strokes were more fluid, the movements more relaxed. I turned back one last time ____________ hello to a clown fish, the reason why I came to the Andamans. As I watched, it played hide-and-seek _________ a sea anemone, before frisking away. Suddenly, I realised a kinship with the blue waters ___________ the Bay of Bengal.

a few glorious minutes ______________, it was time to reluctantly head ashore.