Self-decapitation? Who suggested that? Are you sure?
A self-decapitated head will kill you, so you won't be able to see the results. To do it, stick a bucket on a tray, fill it to the brim with water then dunk your head into it. Weighing the water that spills out onto the tray gives a fairly good approximation of the weight of your head. This theory works because the density of most people's heads is similar to that of water.
The estimate can be improved by visting the local butcher and buying or borrowing a pig's head (the butcher wwill also weigh the head for you). Repeating the head in the bucket process now gives you the displaced volume and mass of the water, and you can weigh the head!
Assuming your head and the pigs head are very close in design and hence close in overall density, you can construct a simple equation:
Volume of pigs head/Weight of pigs head = Volume of your head/Weight of your head
or, on reordering the terms:
Weight of your head= (Volume of your head x Weight of pigs head)/Volume of pigs head
Not all broccoli heads weigh the same, as each will weigh according to their growth.
15 lbs
300,000
A bull's head can weigh around 40 to 50 pounds on average. The weight can vary depending on the size and breed of the bull.
Four kg
it weigh approxamatley 354g
5 grams
a sperm whales head ways about 5 tons (tonnes)
Much the same as your own head.
you will get the summary from your own head after you do your own research
Counting his 300 lb head?
550 lbs