Questions

The focal length of a concave mirror with a radius of curvature of 20.0 cm is :

If an object is thrown upwards, what will be its velocity, when it reaches its maximum height?

Constantan is alloyed from ...... metals.

Out of the four alternatives, choose the one which can be substituted for the given words/sentences and click the button corresponding to it.

A place where astronomical observations are made

Winds blowing constantly in one direction in rocky deserts form

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.
Corruption is a standing hindrance _____ the nation's development.

A sentence/a part of the sentence is underlined. Four alternatives are given to the underlined part which will improve the sentence. Choose the correct alternative and click the button corresponding to it. In case no improvement is needed, click the button corresponding to "No improvement".

If the room had been brighter, I would have been able to read for a while before bed time.

In the following question, out of the four alternatives, select the alternative which best expresses the meaning of the idiom/Phrase.
Make one's flesh creep