Questions

A Sonar of a ship sends sounds waves of speed 1600 m/s. These waves are reflected back by the ocean floor in 4 seconds. Find the depth (in m) of the ocean floor.

A wooden block of mass m1 kg accelerates at m/s when a force of 5 N acts on it. Another block of mass m2 kg accelerates at 20 m/s when the same force acts on it. If both the blocks are tied together and the same force acts on their combination, the acceleration will be about

The color with the longest wavelength is

Which one of the following events in a botanical garden is never directly influenced by light?

Due to incresed weapon launching missions of North Korea, which country has launched a spy satellite to monitor it?

In a computer, what is the name of the high speed memory used

Which article of Indian constitution has the provision for National Emergency?

Which among the following metal is used for galvanization?