Sound produced by an automobile horn heard at a distance of 1.5 metres corresponds to about ______________ decibels?

Related Mcqs:

The upper layer of atmosphere is called the ____________________?

A. Stratosphere B. Troposphere C. Ionosphere D. None of these...

Presence of _____________ bacteria in water causes disease like typhoid?

A. Aerobic B. Pathogenic C. Anaerobic D. Non-pathogenic...

‘Pneumoconiosis’ is a disease caused by the inhalation of ______________ dust?

A. Coal B. Uranium ore C. Iron ore D. Lime...

The earth’s atmosphere is an envelope of gases present upto a height of about ______________ kms?

A. 10 B. 200 C. 1000 D. 2000...

Pick out the wrong statement ?

A. The concentric atmosphere layer just above troposphere is called stratosphere, which is rich in ozone B. Mesosphere is characterised by very low atmospheric pressure and low temperature C. Troposphere is a dusty zone containing water vapor and clouds D. The radio waves used in the long distance radio communication are reflected back to earth … Pick out the wrong statement ?Read More...