Depends.
A nice one can be about 18 lbs (8 kg), but a less expensive one can be about 25 lbs (12 kg)
A bicycle can weigh less than 10 kilo or about 22 lbs. A compact carcan be around 1500 kilos, or 3300 lbs. The car is about 150 times heavier.
4
54.5 kilograms would be a better estimate.
7 grams
10 grams
The weight of a bicycle would best be measured in kilograms (kg).
A better estimate for a child's weight is 36 kg.
Bicycle.
about 15 ounces
Less
light weight and aerodynamics
Really depends on what kind of bike you're looking at. A nice road bike can be 16 lbs, while a DH MTB can be 40 lbs.
2 kilograms.