If a sound wave goes from a cold air region to a hot air ...
If a sound wave goes from a cold air region to a hot air region, its wavelength will
increase
decrease
decrease then increase
remain constant
Correct answer is B
If a sound wave goes from a cold air region to a hot air region (which will be less dense), the velocity decreases, and since the frequency is always constant, the wave length decreases with the velocity
An object is placed 15cm in front of a concave mirror of radius 40cm. The image formed is ...
In which of the following is the expansion of solids a disadvantage? ...
The speed of fast-moving neutrons in a nuclear reactor can be reduced by using? ...
The capacitance of parallel plates capacitors varies ...
Transistors are used for the? ...
When compared with water, mercury is preferred as a thermometric liquid because ...
Arrange the following in the order of their increasing frequency. I. Visible light II. Gamma ra...