# Who invented seconds?

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..

## What is .43 of an hour?

Decimal Hours-to-Minutes Conversion Chart

Minutes Tenths of an Hour Hundredths of an Hour
41 .6 .68
42 .7 .70
43 . 7 .72
44 .7 .74

### How long is a minute?

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

### How much is 8.73 hours?

8.73 hours is 8 hours, 43 minutes and 48 seconds.

### What is .67 on a time clock?

Option 2: Use our minutes conversion chart

Minutes Decimal Hours Decimal Hours
17 .28 .62
18 .30 .63
19 .32 .65
20 .33 .67

## How do you convert minutes to hours in Python?

“convert minutes to hours in python” Code Answer’s

1. time = 72.345.
2. hours = int(time)
3. minutes = (time*60) % 60.
4. seconds = (time*3600) % 60.
5. print(“%d:%02d.%02d” % (hours, minutes, seconds))
6. >> 72:20:42.

### How do you break down an hour into a decimal?

Divide one hour by the number of 30-minute groupings in each hour, 2, to arrive at a decimal value of 0.5 for half an hour. This means that a 15-minute period is equal to 0.25 of an hour, and every 6-minute block is 0.1 of an hour.

### What is 7.70 in hours and minutes?

7.70 hours is 7 hours, 42 minutes and 0 seconds.

What time is 5p in military time? 5:00 p.m. — 1700 hrs. 6:00 p.m. — 1800 hrs. 7:00 p.m. — 1900 hrs.

## How long is 60minutes?

There are 60 minutes in 1 hour.

### What is .07 of an hour?

Decimal to Time conversion

To convert to minutes, simply multiply the decimal hours by 60. So, 0.07×60 = 4.2 minutes.

### Is there 60 Minutes tonight?

There are no TV Airings of 60 Minutes in the next 14 days. Add 60 Minutes to your Watchlist to find out when it’s coming back.

### How many is 60 seconds?

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. That means scientists defined one minute to be 60 seconds.

### How much is 5.77 hours?

5.77 hours is 5 hours, 46 minutes and 12 seconds.

Does military time use minutes? Since military time and regular time use minutes in exactly the same way, no conversion is required. Thus, 0001 military time translates to 12:01 a.m. or one minute past midnight regular time.

What is 50 of an hour? For example, 50 percent of an hour equals 30 minutes, because 0.50 * 60 equals 30.

How do you calculate time cards in hundredths? Divide the minutes by 60 because there are 60 seconds in a minute. In this example, 58 divided by 60 equals . 967. Round the number in the hundredths place up or down.

## Who made the 24-hour day?

Hipparchus, whose work primarily took place between 147 and 127 B.C., proposed dividing the day into 24 equinoctial hours, based on the 12 hours of daylight and 12 hours of darkness observed on equinox days. Despite this suggestion, laypeople continued to use seasonally varying hours for many centuries.

### What time is 60 Minutes on tonight?

“60 Minutes” (7 p.m. PT; 7:30 p.m. ET, CBS): The Army general supervising the distribution of maybe the most important medicine in the nation’s history worries that many Americans may not take it. Gen.

### 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).

### Who invented time?

The Egyptians broke the period from sunrise to sunset into twelve equal parts, giving us the forerunner of today’s hours. As a result, the Egyptian hour was not a constant length of time, as is the case today; rather, as one-twelfth of the daylight period, it varied with length of the day, and hence with the seasons.

## Why is a year 365 days on Earth?

It takes approximately 365.25 days for Earth to orbit the Sun — a solar year. We usually round the days in a calendar year to 365. To make up for the missing partial day, we add one day to our calendar approximately every four years.

### How much is \$2000 a minute in a day?

Minute to Day Conversion Table

Minutes Days
1,000 min 0.694444 day
2,000 min 1.3889 day
3,000 min 2.0833 day
4,000 min 2.7778 day

### Why we have 24 hours in a day?

Our 24-hour day comes from the ancient Egyptians who divided day-time into 10 hours they measured with devices such as shadow clocks, and added a twilight hour at the beginning and another one at the end of the day-time, says Lomb. “Night-time was divided in 12 hours, based on the observations of stars.

Why is the clock 12 hours? The 12-hour clock can be traced back as far as Mesopotamia and ancient Egypt. Both an Egyptian sundial for daytime use and an Egyptian water clock for night-time use were found in the tomb of Pharaoh Amenhotep I. Dating to c. 1500 BC, these clocks divided their respective times of use into 12 hours each.

## How many hours are in a day?

Overall, the Earth is a good timekeeper: the length of a day is consistently within a few milliseconds of 86,400 seconds, which is equivalent to 24 hours.