Questions

What was invented by Zacharias Jansen?

Name the lead actor in the hollywood movie "Top Gun"?

World War II started in the year?

In each of the questions below are given three statements followed by three conclusions numbered I, II, and III. You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follow(s) from the given statements disregarding commonly known facts.
Statements:
Some tables are chairs.
All chairs are benches.
All benches are desks.
Conclusions:
I. Some desks are tables.
II. Some benches are tables.
III. Some desks are chairs.

Charles Darwin, the famous evolutionist, proposed his theory in which one of his books ?

_________ is a natural electrical phenomenon characterized by the appearance of streamers of reddish or greenish light in the sky, especially near the northern or southern magnetic pole.

Calculate the frequency (in Hz) of a sound wave of wavelength 5 m travelling with a speed of 360 m/s.

Due to an acceleration of 4 m/s2 the velocity of a body increases from 10 m/s to 30 m/s in a certain period. Find the displacement (in m) of the body in that period.