The hour angle system is a method used to measure the position of a celestial object in the sky. It measures the angular distance of an object from the observer's meridian, usually in hours (equivalent to 15 degrees per hour). By knowing the hour angle, one can determine the right ascension and declination of the object.
The angle between the hour hand and 1 o'clock on a clock is 30 degrees. This is because the hour hand moves 30 degrees for each hour on the clock face, and at 1 o'clock, it points directly to the 1.
The Earth rotates at the rate of roughly 15 degrees of longitude per hour.
The Earth rotates at the rate of roughly 15 degrees of longitude per hour.
I'm unable to view images. However, an acute angle is any angle that measures between 0 and 90 degrees. It looks like a less than 90-degree angle, such as the angle formed by the hour and minute hand at 3:00 on an analog clock.
On an analog clock it would be 30 degrees. Each hour is going to be 30 degrees. So at 2 it would be 60 degrees.
At exactly 1 o'clock, the hour hand will be at an angle of 30 degrees, and the minute and second hands will be at an angle of 0 degrees.
60 degrees
Think of the old fashioned analog clock at 1 o'clock. Now think of the angle between the hour hand and the minute hand. Not the little angle but the one that goes all the way from 1 through 6 to 12. That angle is 330 degrees.
It is 22.5 degrees.
Each hour, it rotates through 30 degrees, every twelve hours, it rotates 360 degrees.
The minute hand, which is pointing at 3 is at right angles to 12. But the hour hand is no longer pointing at 12. The hour hand does not stay at 12 from 12:00 to 12:59 and then jump through 30 degrees at 1 o'clock. By 12:15, the hour hand has moved 7.5 degrees (clockwise) so at 12.15 the angle is 90-7.5 = 82.5 degrees.
At 11:20 the hour hand is pointing to 1/3 of an hour after 11, which is 20 degrees before 12. The minute hand is pointing at 120 degrees after 12. So the angle between the two is 120+20 = 140 degrees.
The minute and hour hands form an angle of 60 degrees at 10 o'clock
Assuming the hour hand moves steadily for the entirety of the hour, the angle formed by the hour and minute hand would be 55 degrees.
The Earth rotates 360 degrees in 24 hours, which means it rotates 15 degrees per hour (360 degrees / 24 hours = 15 degrees/hour). Therefore, in 2 hours, the Earth will rotate 30 degrees (15 degrees/hour x 2 hours = 30 degrees).
30 degrees