Example of mechanical waves is:
Radio waves
X-rays
Light waves
Sound waves
The speed of sound in a liquid is …………..than that in gases:
Ten times
Fifteen times
Five times
Two times
Image formed on a camera is:
Real, inverted, and diminished
Virtual, upright and diminished
Virtual, upright and magnified
Real, inverted and magnified
Which gate is used for safety alarm:
AND
NANAD
OR
NOR