Aug
29
Mesons are found in ?
A. Laser beam
B. X-rays
C. Gamma rays
D. Cosmic rays
Category: Everyday Science
Everyday Science
Aug
29
Layer affords protection to human beings against solar ultraviolet radiations is ?
A. Troposphere
B. Stratosphere
C. Ionosphere
D. Exosphere
Aug
29
Elements used for making transistors ?
A. Boron and aluminum
B. Iridium and tungsten
C. Niobium and columbium
D. Silicon and germanium
Aug
29
Decibel is the unit of ?
A. Intensity of sound
B. Radio wave frequency
C. Speed of light
D. Intensity of heat
Aug
29
Which is used as a moderator in nuclear reactor ?
A. Thorium
B. Radium
C. Ordinary water
D. Graphite
Aug
29
Gases used in welding includes ?
A. Oxygen and Hydrogen
B. Oxygen, Hydrogen, Acetylene, and Nitrogen
C. Oxygen, Acetylene, and Argon
D. Oxygen and Acetylene