The time for the hour hand to walk a small square is: 3600× 1/5= 1200 (seconds), and the time for the second hand to walk once is: 60 seconds; So the second hand turns once, and the hour hand can't walk in a small space. So it is wrong to say that the topic is dry.

The second hand refers to the pointer on the clock that moves in seconds, and every time it moves a big grid, it is 1 second. ?

A pointer on a clock that moves in seconds.

1 min =60 seconds

1 hour =60 minutes =3600 seconds.

24 hours = 1440 minutes =86400 seconds.

The angle between the two hands on the hour hand is =(m= minutes, h= hours). Note: The timing system of 12 hours must be adopted. When it reaches 12:00, the hours must be reduced by 12.

12:00→0:00

20:30→8:30

For example:

At 4: 30, the angle between the two needles =?

Extended data:

The reason why the hour hand rotates clockwise stems from its predecessor, the sundial. The hour hand first appeared in the northern hemisphere, and its function is similar to the "shadow pointer" projected by the sundial on the ground. The sun rises in the east and sets in the west, and its shadow on the sundial runs in the opposite direction, from west to east, so the numbers representing time on the sundial are arranged in this way, and the numbers on the surface of modern clocks follow this arrangement.

Counter-clockwise: the opposite of clockwise, representing counter-clockwise rotation.

Whether the object rotates clockwise or counterclockwise is related to the observation angle. For example, when viewed from directly above the North Pole, the rotation of the earth is counterclockwise, and when viewed from directly above the South Pole, the rotation of the earth is clockwise.

Mathematically, the clockwise angle is negative and the counterclockwise angle is positive.