Which of the following is NOT a food

The instrument which uses sound waves to measure the depth of oceans is –

Electrical fuse is used to interrupt excess of _________.

Who defined the law of gravitation? 

Which of the following statements is true when we see 'rainbow'?

The time period of a second’s pendulum is –

What is the pH of Urine ?

How much calorie of energy is released by a boiled egg?

For which type of motion, the distance time graph is not a straight line and can be any kind of curve?

Water Turbine was invented by ________ .

A ship will submerge when it displaces water equal to its