Which of the following substances lowers the surface tens...
Which of the following substances lowers the surface tension of water?
metal
sand
detergent
paper
Correct answer is C
No explanation has been provided for this answer.
A simple pendulum makes 50 oscillations in one minute. Determine its period of oscillation ...
When a ray of light passes from water to glass, it is ...
Which of the following statements describes an atom accurately? i. atoms of all elements are iden...
Which of the following statements about sound is NOT true? ...