Questions

During the free fall of the object, the decrease in potential energy, at any point in its path, appears as an equal amount of increase in _________________.

An echo is returned in 3 s. What is the distance of the reflecting surface from the source, considering the speed of sound as 342 ms-1?

In the following question, the sentence given with blank to be filled in with an appropriate word. Select the correct alternative out of the four and indicate it by selecting the appropriate option.

Aryabhatta was the first astronomer to state ______ that the earth is round and it rotates on its axis.

In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. Ifa sentence is free from error, select 'No Error'.   

The noise startled (1)/ the dog (2)/ and made it to yell. (3)/ No error (4)

How many bones does a human baby have?

The instrument used to examine a person's digestive tract is called ___.

A price floor is _____.

In perfect competition _____.