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.
According to Newton sound travel in air under the conditions of_____________________?
Power of a lens is one diopter if its focal length is
A certain stress applied to an elastic material produces a certain strain in it. If the elastic limit is not exceeded the energy gained per unit volume of the material is given by_________________?
A wire of length L is stretched by a length E when a force F is applied at one end. If the elastic limit is not exceeded the amount of energy stored in the wire is_________________?
The unit of force in CGS, system is __________?
To measure the speed of an approaching car a police officer shines?