2007-09-25 08:07:49 · 9 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Earth Speed Around Itself
2017-01-15 06:58:38 · answer #1 · answered by spurgin 4 · 0⤊ 0⤋
The whole Earth spins completely around once a day, while the inner core rotates an extra three degrees or so each year. In approximately 120 years, the planet within completes an extra lap (360 degrees).
The Earth rotates once in a few minutes under a day (23 hours 56 minutes 04. 09053 seconds). This is called the sidereal period (which means the period relative to stars). The sidereal period is not exactly equal to a day because by the time the Earth has rotated once, it has also moved a little in its orbit around the Sun, so it has to keep rotating for about another 4 minutes before the Sun seems to be back in the same place in the sky that it was in exactly a day before.
2007-09-25 08:18:16 · answer #2 · answered by Anonymous · 0⤊ 0⤋
That depends on where on Earth you are standing. At the poles, the Earth hardly spins at all, but as you travel towards the equator, the rotational speed picks up. This makes sense -- as the circumference of a circle increases, a single point along it has to travel faster to complete a revolution in the same amount of time.
The rotational speed of the Earth at the equator is about 1,038 miles per hour. The atmosphere at the equator is also slightly thicker due to rotation, and you weigh slightly less. At mid-latitudes, the speed of the Earth's rotation decreases to 700 to 900 miles per hour.
If the Earth were to stop spinning suddenly, the atmosphere would still be zipping along nicely at around 1,000 miles an hour. As a result, everything not attached to bedrock would pretty much be scoured
2007-09-25 08:10:40 · answer #3 · answered by i pack a 44 5 · 1⤊ 1⤋
It's simple math. The earth's radius is 6378 km so the circumference is :
C = 2*pi*r = 4x10^4 km.
A point on the equator travels this distance once in 24 hours or 24 x 60 x 60 seconds so teh speed is:
v = 4x10^4 km/(24x60x60 sec) = 463 m/s
The effective linear speed decreases as you move north or south of the equator.
2007-09-25 08:17:43 · answer #4 · answered by nyphdinmd 7 · 0⤊ 1⤋
At the equator the Earth turns on it's axis at a speed of 1040 MPH.
2007-09-29 07:07:29 · answer #5 · answered by johnandeileen2000 7 · 0⤊ 0⤋
Of course you have pick a point somewhere on earth.
So let's choose one right on the equator.
The circumference of the earth at the equator is 40.000 km.
The earth spins around its axis in 24 hours.
So the speed of our chosen point is 40.000 divided by 24 = 1666,67 km/hr.
2007-09-25 08:13:05 · answer #6 · answered by Hi y´all ! 6 · 0⤊ 0⤋
I am not sure how fast it orbits the sun but i have heard that the Earth rotates about 1000 mph.
2007-09-25 08:10:47 · answer #7 · answered by m16mcm16 2 · 0⤊ 0⤋
do you mean how fats does the earth spin---- about 1000 mph
it takes 24hours to go around and it's 25000 miles dia. go figure
2007-09-25 08:13:18 · answer #8 · answered by waterraven2 2 · 0⤊ 0⤋
The earth rotates at 0.5 km/sec.
2007-09-25 08:10:47 · answer #9 · answered by QueenOfResources 2 · 1⤊ 0⤋