Questions

By which process substance like carbon dioxide or oxygen can move across the cell membrane?

In the following question, four words are given out of which one word is correctly spelt. Select the correctly spelt word.

A sentence has been given in Direct/Indirect Speech. Out of the four given alternatives, select the one which best expresses the same sentence in Indirect/Direct Speech.

Meera said, “I prefer singing to dancing.”

What is the heat generated (in J) in a heating element of resistance 1000 Ω when a current of 0.1 A passes through it for 25 seconds?

If a ball is thrown vertically upwards with a velocity of 40 m/s, then what will be the magnitude of its displacement after 6 s?

What is the mean temperature of Earth?

Venus is the _______ planet from the Sun.

Find the power of a convex lens if the image formed is at a distance of 25 cm from the lens when the object is placed on the other side of the lens at 12 cm from the optical centre?