Examples of hertz

• Visual observations of the turbulent fluctuations suggested that a low frequency response flat down to 0.2 hertz would have been useful.

• This is virtually always the case for real-time simulations with refresh rates of several hundred hertz.

• Since the 1960s it was recognised that the alpha, beta and theta types have a link to different hertz levels that can be associated with different mental states.

• This frequency varies linearly with chemical concentration and will change by up to several hundred hertz when exposed to a strong concentration of the target chemical.

• It is not cost effective to convert a complete railway system to the standard of 25,000 volts at 50 hertz, which is the preferred methodology nowadays.

• This jet of gas occurs for a very brief duration, about 0.02 seconds, and at high frequency: 4-11 hertz.

• High-frequency (typically 20,000 hertz) ultrasonic vibrations are locally applied to metal foil materials, held together under pressure, to create a solid-state weld.

• Since the numerator is usually in hertz, and the denominator in megahertz, delta is expressed in ppm.