Whois & Analysis for vclock.com

An alarm clock (or sometimes just an alarm) is a clock that is designed to alert an individual or group of individuals at specified time.

The primary function of these clocks is to awaken people from their night's sleep or short naps; they are sometimes used for other reminders as well.

Most use sound; some use light or vibration.

Some have sensors to identify when a person is in a light stage of sleep, in order to avoid waking someone who is deeply asleep, which causes tiredness, even if the person has had adequate sleep.

To stop the sound or light, a button or handle on the clock is pressed; most clocks automatically stop the alarm if left unattended long enough.

A classic analog alarm clock has an extra hand or inset dial that is used to specify the time at which to activate the alarm.

Alarm clocks are also found on mobile phones and watches.

Time is the indefinite continued progress of existence and events that occur in apparently irreversible succession from the past through the present to the future.

Time is a component quantity of various measurements used to sequence events, to compare the duration of events or the intervals between them, and to quantify rates of change of quantities in material reality or in the conscious experience.

Time is often referred to as the fourth dimension, along with the three spatial dimensions.

The minute is a unit of time or of angle.

As a unit of time, the minute is equal to (the first sexagesimal fraction) of an hour, or 60 seconds.

In the UTC time standard, a minute on rare occasions has 61 seconds, a consequence of leap seconds (there is a provision to insert a negative leap second, which would result in a 59-second minute, but this has never happened in more than 40 years under this system).

As a unit of angle, the minute of arc is equal to of a degree, or 60 seconds (of arc).

Although not an SI unit for either time or angle, the minute is accepted for use with SI units for both.

The SI symbols for minute or minutes are min for time measurement, and the prime symbol after a number, e.g. 5′, for angle measurement.

The prime is also sometimes used informally to denote minutes of time.

In physics, sound is a vibration that propagates as a typically audible mechanical wave of pressure and displacement, through a transmission medium such as air or water.

In physiology and psychology, sound is the reception of such waves and their perception by the brain.

Humans can hear sound waves with frequencies between about 20 Hz and 20 kHz.

Sound above 20 kHz is ultrasound and below 20 Hz is infrasound.

Other animals have different hearing ranges.

An hour (symbol: h; also abbreviated hr) is a unit of time conventionally reckoned as of a day and scientifically reckoned as 3,599–3,601 seconds, depending on conditions.