Materials used to make raincoats have high surface tension because due to surface tension water droplets do not stick to the material.
39) Materials for rain-proof coats and tents owe their water-proof properties to
Answer is:
surface tension
Explanation:
Related General Physics MCQ with Answers
Answer is:
detecting and locating the position of objects such as aeroplanes
Explanation:
RADAR standa = Radio Detection And Ranging And It Is Used For Detecting And Locating The Position Of Objects Such As Aeroplanes.
Answer is:
infrasonic
Explanation:
Infrasonic : less than 20Hz (can not be heard by humans) Ultrasonic : between 20Hz and 20kHz (can be heard by humans) Supersonic : more than 20kHz (can not be heard by humans)
Answer is:
cohesion of mercury is greater than its adhesion with glass
Explanation:
Cohesion is nothing but attraction between two atoms.
Answer is:
increase its electrical conductivity
Explanation:
This principle is known as Doping. Adding of an impurity to a pure semi conductor in order to increase certain properties.