When do the minute and hour hands on the clock coincide

How many times in the 24-hour day do the hour and minute hands of the clock coincide exactly?

11 2 = 22 times.

1 o'clock, 13:30 (another 5 11 minutes.)

2 o'clock, 2 p.m. 60 p.m. (10 11 p.m.)

3 o'clock, 15:90 (4 11 minutes.)

4 o'clock, 16 o'clock 120 (again 9 11 minutes.)

5 o'clock, 17 o'clock 150 (again 3 11 minutes.)

6 o'clock, 18 o'clock 180 (again 8 11 minutes.)

7 o'clock, 7 p.m. 210 (again 2 11 minutes.)

8 o'clock, 20 o'clock 240 (again 7 11 minutes.)

9 o'clock, 21 o'clock 270 (again 1 11 minutes.

10 o'clock, 22 o'clock 300 (again 6 11 minutes.)

12 o'clock and 24 o'clock.

The hour hand coincides with the minute hand of Bonkai at 0 o'clock and 12 o'clock on the hour, as well as at :59.

The minute hand goes to the dial for one hour, the hour hand goes to 1 12 of the dial for an hour, and the minute hand has to go 1 12 degrees of the dial to catch up with the hour hand again, that is, it takes another 5 minutes to coincide with the hour hand again (the displacement of the hour hand in 5 minutes is not counted). Therefore, the interval between the minute hand and the hour hand coincide is one hour and five minutes.

The difference between the hour hand and the minute hand.

1. The length is different, and the minute hand is longer than the hour hand.

2. The thickness is different, generally the thicker is the hour hand, and the thinner is the minute hand.

3. The rotation rate is different, the hour hand rotates for 12 hours, and the minute hand rotates for 1 hour.

4. The meaning of the representation is different, the hour hand represents the number of points and hours of time, and the minute hand represents the number of minutes.

1 o'clock, 13:30 (another 5 11 minutes.)

2 o'clock, 2 p.m. 60 p.m. (10 11 p.m.)

3 o'clock, 15:90 (4 11 minutes.)

4 o'clock, 16 o'clock 120 (again 9 11 minutes.)

5 o'clock, 17 o'clock 150 (again 3 11 minutes.)

6 o'clock, 18 o'clock 180 (again 8 11 minutes.)

7 o'clock, 7 p.m. 210 (again 2 11 minutes.)

8 o'clock, 20 o'clock 240 (again 7 11 minutes.)

9 o'clock, 21 o'clock 270 (again 1 11 minutes.

10 o'clock, 22 o'clock 300 (again 6 11 minutes.)

12 o'clock and 24 o'clock.

In terms of words, moment can be used as a noun, such as an exciting moment, etc. In addition, moment can also be used as an adverb to describe a verb, such as we often say always ready, etc.

Moment: Represented by a point on the timeline. ...... at the end of 1s, 2s, and 3s; The beginning of 1s, the beginning of 2s, and the beginning of 3s ......

The hour and minute hands on the clock face coincide at 12 o'clock and zero o'clock.

The hour and minute hands on the clock face coincide at 12 o'clock.

Before 1:00, the hour hand and the minute hand do not coincide, because the hour hand and the minute hand go together from 0:00, the hour hand moves slowly, the minute hand travels faster, and the angular speed of the minute hand is 12 times the angle of the hour hand.

After an hour, between 1:00 and 2:00, the hour and minute hands should coincide once, because after 1:

In the hour from 00 to 2:00, the hour hand turns and the minute hand turns again. From 1:

From 00 onwards, the hour and minute hands are moving in a circle. It can be said that the hour hand starts in front (it starts at one o'clock) and the minute hand is behind (it starts at twelve o'clock), but since the minute hand turns in one hour and the hour hand only turns in one hour, the angular velocity of the minute hand is faster than that of the hour hand, so the minute hand can gradually approach the hour hand, coincide with the hour hand, and then exceed the hour hand. to 2:

At 00 o'clock, the hour hand points to two o'clock, and the minute hand points to twelve o'clock. It can be seen that the hour and minute hands move at the same time from 0:00, after 1:00

The first coincidences will be achieved sometime between 05 and 1:10. Since the hour and minute hands are moving at a constant speed, it is clear that the hour and minute hands will coincide every 1 hour and 0 minutes.

Thus, between 0:00 and 12:00, the hour and minute hands coincide at the following moments:

0:00, 1:00, 2:00, 3:00, 4:00, 5:00, 6:00, 7:00, 8:00, 9:00, 10:00, 11:60 (i.e. 12:60). Throughout the day, just in :

At 00 and 24:00, the hour, minute and second hands all coincide.

The hour and minute hands coincide at 12 o'clock or 24 o'clock. In 24 hours, the hour and minute hands coincide a total of 22 times, two of which coincide at the hour, that is, at 12 o'clock, and the remaining 20 times are not imitations on the hour. The hour hand is the hand on the clock that indicates the hour, there are three hands on the clock, the longest is the second hand, the shortest is the hour hand, and the minute hand in the center of the length.

The dial of a clock is divided into 12 large divisions and 60 small divisions, the hour hand travels one large block for one hour, the minute hand travels one large block for 5 minutes, and the minute hand goes one circle for 60 minutes, and the hour hand moves one large block while the minute hand goes around, that is, 1 hour.

The difference between the hour hand and the minute hand.

1. The length of the hour hand and the minute hand are different:

In general, the longer hand on a clock is the hour hand, and the shorter hand is the minute hand.

2. The thickness of the hour hand and the minute hand is different

Generally speaking, if the hour and minute hands on a watch are of different thickness, the thicker is the hour hand and the thinner is the minute hand.

3. The rotation rate of the hour hand and the minute hand is different

It takes 12 hours for the hour hand to make one revolution, and one hour for the minute hand to make one revolution. The hour hand moves in units such as hours, rotates 30 degrees per hour, rotates every minute, the minute hand moves in minutes and minutes, and the minute hand moves in a small block on the clock for 1 minute rock strip, with a rotation angle of six degrees, and each number goes for 5 minutes, and the rotation angle is 30 degrees.

The minute and hour hands coincide at 12 o'clock or 24 o'clock. In 24 hours, the hour and minute hands coincide 22 times, two of which coincide on the hour, namely zero and 12 o'clock, and the remaining 20 times are not on the hour.

1 o'clock, 13:30 (another 5 11 minutes.)

2 o'clock, 2 p.m. 60 p.m. (10 11 p.m.)

3 o'clock, 15:90 (4 11 minutes.)

4 o'clock, 16 o'clock 120 (again 9 11 minutes.)

5 o'clock, 17 o'clock 150 (again 3 11 minutes.)

6 o'clock, 18 o'clock 180 (again 8 11 minutes.)

7 o'clock, 7 p.m. 210 (again 2 11 minutes.)

8 o'clock, 20 o'clock 240 (again 7 11 minutes.)

9 o'clock, 21 o'clock 270 (again 1 11 minutes.

10 o'clock, 22 o'clock 300 (again 6 11 minutes.)

12 o'clock and 24 o'clock.

The difference between the minute hand and the hour hand1. The length is different. The minute hand is longer than the hour hand.

2. Different thicknesses. Generally, the thicker is the hour hand, and the thinner is the minute hand.

3. The rotation rate is different. It takes 12 hours for the hour hand to make one revolution, and one hour for the minute hand to make one revolution. The hour hand moves in hours, the minute hand moves in minutes, and the minute hand moves for one minute for every small block on the clock.

4. The meaning of the representation is different. The hour hand represents the number of points and hours of time, and the minute hand represents the number of minutes.

Every time the clock reaches 0:00 or 12:00, the minute hand and the hour hand coincide.

1. At 0 o'clock and 12 o'clock, the minute hand and the hour hand coincide, as shown in the following figure

2. At 6 o'clock and 18 o'clock, the hour hand and the minute hand form a straight line, as shown in the following figure

Expansion of information training punching:1. Characteristics of the hands on the clock face:

1. Length: The second hand is the longest, the hour hand is the shortest, and the minute hand length is between the two.

2. Running speed: the second hand is the fastest, the hour hand is the slowest, and the minute hand is in between.

3. The width of the yard in the hole: Generally speaking, the second hand is the thinnest, the hour hand is the thickest, and the minute hand is in between.

2. Conversion relationship of time units:

1. One day = 1440 minutes, 1 hour = 60 minutes, 1 minute = 60 seconds.

2. One moment = 15 minutes, one word = 5 minutes (southern Fujian.

Guangdong regional usage).

To calculate the hour, the hour and minute hands coincide at 12 o'clock; At 6 o'clock, the minute hand and the hour hand form a straight line; At 3 o'clock or 9 o'clock, the minute hand and the hour hand form a right angle.

The hour and minute hands overlap 22 times a day, and if the time of the hour and minute hands of a clock coincides at 12 o'clock, it coincides again every 360 (and 5 11 (minutes). Number of overlaps in a day: 24 * 60 (65 and 5 11) = 1440 * 11 720 = 22 times.

22 analyses coincided in one day.

Because the angle of the center of the circle rotated by the hour hand for 1 minute is degrees, and the angle of the center of the circle rotated by the minute hand for 1 minute is 6 degrees, when the two needles coincide for the first time and then coincide for the second time, the number of angles of the center of the circle rotated by the minute hand is 360 degrees more than that of the socks and the hour hand, so the time required for the two needles to coincide again is: t = 65 + 5 11 minutes.

This kind of problem is actually the pursuit problem of the minute hand chasing the hour hand, and its formula is: t=s (v1-v2), s=60 (d), minute hand speed: v1=1 dg minute, hour hand speed:

v2 = 1 12 square minutes, therefore, the calculation obtains t t = 65 + 5 11 minutes, according to the above calculation, every 65 + 5 11 minutes the hour hand and the minute hand coincide. That is, from 12 o'clock, every 65 + 5 11 minutes, the hour hand and the minute hand coincide once, and the whole day coincides a total of 22 times.

When the hour and minute hands form a line (but do not coincide), it is (6) o'clock.

The hour and minute hands coincide at (12) o'clock.

Clock. A few key angles on the dial:

1) 9 o'clock in the morning: the hour and minute hands are at an angle of 90 degrees.

2) 12 noon sharp: the hour and minute hands are at an angle of 0 degrees.

3) At 3 p.m., the hour and minute hands are at an angle of 90 degrees.

4) 6 p.m. sharp: The hour and minute hands are angled at 180 degrees.