Confidence votes 123. The weight that can be carried in a semi trailer legally varies. It depends on how much the tractor pulling the trailer weighs. The maximum weight of the total unit, truck and trailer is limited at 80,000 lbs without getting special permits.
We canât feel Earthâs rotation or spin because weâre all moving with it, at the same constant speed. Earth spins on its axis once in every 24-hour day. At Earthâs equator, the speed of Earthâs spin is about 1,000 miles per hour (1,600 kph). The day-night has carried you around in a grand circle under the stars every day of your life, and yet you donât feel Earth spinning. Why not?
Measuring the speed of a rotating object like the Earth is slightly more complicated. After all, if you stand at one of the poles, you'll spin right along with the rest of the Earth, but you'll be stationary with respect to its center. Stand on the equator, though, and you'll have a linear speed of 1,036 miles per hour (1,667 kilometers per hour) [source: Esri]. That's faster than the speed of sound, and one of the reasons we tend to launch rockets toward the east [source: NASA]!