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A sound wave has a frequency of 500 Hz. The sound wave has a wavelength of 0.34 m in air. Calculate the speed of the sound wave in air?

As we know so far, c = f / λ. This equation comes from a much simpler version of speed = distance/ time. As the λ (with units "m") can be seen as distance and the frequency (with units "...

Answered by Reni A. • Physics tutor

15719 Views

Define the term ultrasound wave

An ultrasound wave is a soundwave with a frequency higher than 20,000 Hz

Answered by Reni A. • Physics tutor

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Insulating a home costs £2000 and saves £50 a year. What is the payback time?

40 years.

Answered by Leo T. • Physics tutor

3149 Views

Two railway trucks of masses m and 3m move towards each other in opposite directions with speeds 2v and v respectively. These trucks collide and stick together. What is the speed of the trucks after the collision?

In order to solve this question we need to use the principle of conservation of momentum which states:

The momentum in a closed system remains constant before and after a collision or exp...

Answered by Sarah W. • Physics tutor

32710 Views

Define the terms "acceleration" and "displacement". Explain simple harmonic motion with reference to both of these quantities.

Firstly, acceleration is the rate of change of velocity of an object, measured in ms^-2 (read as metres per second squared, or metres per second per second). It can be either positive, indicatin...

Answered by Hannah O. • Physics tutor

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