True or false: the amount of a radioactive element remaining in an object its measured. based on the known half life of the element the amount remaining can be used to calculate how old the object is.

True

Explanation:

All radioactive element have a specific property of reducing itself by half of its actual amount in a certain period of time.

Suppose, an element X has a half life of 3 years. This means that this element "X" will reduce its quantity by half after every three years.

Now , if a case in given in which it is specified that some "Y" grams of element "X" is found and the age of the substance in which this element "X" is found is to be determined.

Then by the under given relation the age of substance containing element X can be determined

Where "N" is the inital mass or atomic mass of X

N0 is the present mass of X

t is the age of substance

and is the decay constant i.e half life

the answer is: trichonympha lives in the gut of termites and digests cellulose eaten by the termite.

this is an example of a symbiotic association of a protozoan with its mode of association.

hope i

-lavira: )

ecological efficiency: % of usable energy transferred as

biomass from one trophic level to the next typical is 10% efficient (90% of

energy is lost),is diagramed as the pyramid of energy flow. then osprey eagle

are tertiary consumer and the shrimp are primary consumer, so to balance

mass of shrimp (1/0.1) / 0.1 = 100 kg