# data[].attributes.headline
 useful for estimating the volume of an item with a non-regular form.

# data[].attributes.subject
 useful for estimating the volume of an item with a non-regular form.

# data[].attributes.headline
he formulated the principle by investigating a problem of the king of Sicily

# data[].attributes.subject
he formulated the principle by investigating a problem of the king of Sicily

# data[].attributes.body
upward force

# data[].attributes.body
fluid

# data[].attributes.body
gas

# data[].attributes.body
liquid

# data[].attributes.headline
any object that is submerged in a fluid is acted by an upward force (buoyant force F_b)

# data[].attributes.subject
any object that is submerged in a fluid is acted by an upward force (buoyant force F_b)