Let’s discuss the question: how many seconds is 9 minutes. We summarize all relevant answers in section Q&A of website Tw.kienthuccuatoi.com in category: Information. See more related questions in the comments below.

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## How do you write 9 minutes?

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Minutes to Decimal Hours Calculator.

Minutes | Decimal Hours |
---|---|

7 | 0.117 |

8 | 0.133 |

9 | 0.150 |

10 | 0.167 |

## What is the seconds of 1 minute?

There are **60 seconds** in 1 minute. In other words, a second is 160 of a minute. The second is called the base unit of time.

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## How long is 1 minute exactly?

The minute is a unit of time usually equal to 160 (the first sexagesimal fraction) of an hour, or **60 seconds**.

## What is longer 1 second or 1 minute?

The answer, simply, is that **a second** is 1/60th of a minute, or 1/3600th of an hour.

## How do you write 1 minute?

**min**.

**‘**(informally)

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**Abbreviations for Minutes**

- 1 min.
- 5 min.
- 45 min.
- 1′
- 5′
- 45′

## How do you write minutes minute seconds?

How do you denote hours minutes and seconds? The advantage of using minute and second symbols for time is that it obviously expresses a duration rather than a time. Prime markers start single and are multiplied for susbsequent appearances, so **minutes use a single prime ′ and seconds use a double-prime ″**.

## How long is a second?

Since 1967, the second has been defined as exactly “the duration of **9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom**” (at a temperature of 0 K and at mean sea level).

## How long is a 1 minute dog?

A minute for us is 60 seconds. This means that a dog minute is going to be **8.5 seconds**.

## How many hours has a year?

Each day has 24 hours, so the conversion ratio is simple: Every Common Year: 24 hours x 365 days = **8,760 hours**.

## How do you say 45 minutes in English?

At minute 45, we say it’s “**quarter to**” the next hour. For example, at 5:45, we say it’s “quarter to six” (or 15 minutes before 6:00). At minute 30, we say it’s “half past”. So at 9:30, we would say it’s “half past nine” (or half an hour after 9:00).

## Why does a minute have 60 seconds?

The Babylonians made astronomical calculations in the sexagesimal (base 60) system they inherited from the Sumerians, who developed it around 2000 B.C. Although it is unknown why 60 was chosen, **it is notably convenient for expressing fractions**, since 60 is the smallest number divisible by the first six counting numbers …

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## Who created minutes?

Who decided on these time divisions? THE DIVISION of the hour into 60 minutes and of the minute into 60 seconds comes from **the Babylonians** who used a sexagesimal (counting in 60s) system for mathematics and astronomy. They derived their number system from the Sumerians who were using it as early as 3500 BC.

## Why are seconds Called seconds?

Historical origin

**Originally, the second was known as a “second minute”, meaning the second minute (i.e. small) division of an hour**. The first division was known as a “prime minute” and is equivalent to the minute we know today. Third and fourth minutes were sometimes used in calculations.

## What is second time?

The second (abbreviation, s or sec) is the Standard International ( SI ) unit of time. One second is **the time that elapses during 9,192,631,770 (9.192631770 x 10 ^{9} ) cycles of the radiation produced by the transition between two levels of the cesium 133 atom**. There are other expressions for the second.

## How do you write 4th?

4th = **fourth** (It’s his fourth birthday.)

## How do you write seconds in short form?

The second (abbreviation, **s or sec**) is the Standard International ( SI ) unit of time.

## How do you write 5 minutes in short?

5 mins” would be appropriate unless you are expressing it as an adjective then use the singular form, as in a five minute break or the ten minute mark. However, in scientific writing, the abbreviation for the units is always in the singular form – **5min, 5km, 5kg**.

## Can you add time?

Like other numbers, **time can be added or subtracted**. However, due to how time is defined, there exist differences in how calculations must be computed when compared to decimal numbers.

## What makes a hour?

An hour (symbol: h; also abbreviated hr) is a unit of time conventionally reckoned as **1⁄24 of a day** and scientifically reckoned as 3,599–3,601 seconds, depending on conditions. There are 60 minutes in an hour, and 24 hours in a day.

## How do you write hours in short form?

Meaning of hrs in English

(also **hrs.**) written abbreviation for hours: used when giving times or saying how long something will take: Opening times are 0900-2300 hrs.

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## How long is 1 second in space?

The light-second is a unit of length useful in astronomy, telecommunications and relativistic physics. It is defined as the distance that light travels in free space in one second, and is equal to exactly **299,792,458 metres** (983,571,056 ft).

## How long is a day?

Day Length

On Earth, a solar day is **around 24 hours**. However, Earth’s orbit is elliptical, meaning it’s not a perfect circle. That means some solar days on Earth are a few minutes longer than 24 hours and some are a few minutes shorter.

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