1600 feet per minute
To lift their spirits
most of the time
That depends on the size, height and make of the ladder. Since ladders come in all heights and makes, they can range from 10 lbs to over 50 lbs.
Gallelio, when he dropped two stones of unequal weight from the top of the leaning tower of Pisa.
Yes objects do weigh more whilst moving in elevators. This is due to energy mass equivalence that Einstein detailed through the well-known e=mc2 equation. An object in an elevator is moving and therefore has kinetic energy, which translates into more mass. This increase, however, is extremely minute and not measureable with normal scales (even down to .000001 of a pound) because the mass increase is the amount of energy divided by 8.98755179 × 1016 (the speed of light squared).
104, with 16 double-decker elevators Sears Tower was renamed Willis Tower on July 16, 2009.
There are 6 elevators inside the tower.
it took one min. to get up to the 103thrd floor, and your ears pop on the way up and down is what i experienced.
No
The north, and the south tower had 99 elevators each.
sears tower.
of course :D
elevators and stairs
50 stories are on the sears tower
The Willis Tower is in Downtown Chicago and is 1,450 feet tall. The elevators can reach a top speed of just over 18 miles per hour.
The Sears Tower is now officially called Willis Tower.
6 to the max