Correct answer
B. Two
Explanation
Two is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
The normal ear is the most sensitive in the frequency range___________________?
The escape velocity form the earth surface in km S-1 is____________________?
Which instrument is used to detect path of visible rays?
Waves transmit ________________ from one place to another?
Compton effect proves the________________?
Velocity of fluid increases where the pressure is________________?