There are a couple of different options:
-the wheel has a threaded axle which protrudes on both sides and fits in slots in the dropouts at the end of the fork or rear triangles. Nuts are threaded onto the axle ends and screwed down until they clamp the wheel in place.
-The wheel has a hollow axle that protrudes just a tiny bit on both sides of the wheel. It fits just like above, but then there's a skewer that goes through the hollow axle. On one end of the skewer there's a tensioning lever and on the other there's a threaded nut. First the nut is done up finger tight then the tensioning lever is used to really lock the wheel in place.
-the wheel has an unthreaded axle that protrudes quite a bit, and is held in place by wraparound clamps at the dropouts.
ferris wheel, a bicycle, a screw and a doorknob ferris wheel, a bicycle, a screw and a doorknob
A bicycle is both.
The wheel, and many other things a bicycle is a compound machine
Depends on make and model of bicycle
A bicycle tire is a tire which fits on the wheel of a bicycle or similar vehicle.
Unicycle = 1 wheel. Bicycle = 2 wheels. Tricycle = 3 wheels.
A bicycle fork is the portion of a bicycle that holds the front wheel and allows the rider to steer and balance the bicycle.
wheel+wheel=bicycle
Wheel and axle.
A bicycle
swirly chairs
The circumference of the wheel is Pi multiplied by the diameter (0.705). Divide 1000 meters (1km) by that answer - and you'll have your solution !