Q. How many high and low tides are there in a day?
A. Approximately 2 high tides and 2 low tides in 24 hours
Q. How fast does the earth rotate?
A. At the equator, the speed of rotation of the earth is 1668 kilometres per hour.
Q. Why is it hot at the equator?
A. The sun is almost directly overhead, whereas at other places on the earth, the sun shines at an angle.