When WBCs greatly increased in number, they cause a disease called?

Which of the following principleis used to produce ‘low-temperatures’ ?

A. Super conductivity
B. Joule-Kelvin effect
C. Thermo-electric effect
D. Adiabatic demagneti-sation

Tyndall effect is related to the ______ of light?A. Reflection
B. Dispersion
C. Scattering
D. Refraction

The Tyndall effect is the scattering of light as a light beam passes through a colloid. The individual suspension particles scatter and reflect light, making the beam visible. The amount of scattering depends on the frequency of the light and density of the particles.

 

Which planet in our solar system has the most gravity?

A. Jupiter
B. Mercury
C. Venus
D. Neptune

The side view mirrors of vehicles are of which type of mirrors?

A. Convex
B. Concave
C. Plane
D. Inverted

The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is ________ ?

A. Argon
B. Xenon
C. Helium
D. Krypton

Heliox is a mixture of oxygen and helium and is often used in the deep phase of a commercial deep dive to eliminate nitrogen narcosis. Heliair is a form of trimix that is easily blended from helium and air without using pure oxygen. It always has a 21:79 ratio of oxygen to nitrogen; the balance of the mix is helium.