diamond des not conduct electricity, because it has no:
free electrons
free protons
free neutrons
free positive charge
An object is 14 cm in front of a convex mirror. The image is 5.8 cm behind the mirror. What is the focal length of the mirror:
-4.1 cm
-8.2 cm
-9.9 cm
-20 cm
1 volt is equal to:
JC
JC-1
JC-2
JC-3
Bouncing back of light after striking the surface is called:
Reflection
Diffraction
Interference
The speed of sound in air at 0°C is:
331ms-1
376ms-1
231ms-1
386ms-1