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3 years ago

Wich of these describes a use of biostimulation?

Biology

1 answer:

Evgen [1.6K]3 years ago

4 0

Where are the choices

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When a living organism dies, it stops taking in new carbon. Thus, as the radioactive carbon-14 decays, the ratio of carbon-12 to

Alexxandr [17]

Answer: The fossil is 11459 years old.

Explanation:

Half-life of carbon-14 = 5700 years

First we have to calculate the rate constant, we use the formula :

$k=\frac{0.693}{5700\text{years}}$

$k=1.21\times 10^{-4}\text{years}^{-1}$

Now we have to calculate the age of the sample:

Expression for rate law for first order kinetics is given by:

$t=\frac{2.303}{k}\log\frac{a}{a-x}$

where,

k = rate constant = $1.21\times 10^{-4}\text{years}^{-1}
t = age of sample = ?
a = let initial amount of the reactant = 100 g
x = amount decayed = 75 g
a - x = amount left after decay process = 100 - 75 = 25 g Now put all the given values in above equation, we get
[tex]t==\frac{2.303}{1.21\times 10^{-4}}\log\frac{100}{25}$

$t=11459years$

The fossil is 11459 years old.

4 0

3 years ago

Plssss help!

just olya [345]

The correct answer is option D. copper (Cu)

Malleability is the ability of metals to be hammered into sheets.

Metals are often required for different applications. The ability of metals to be hammered into sheets is called malleability.

Malleability of a metal is closely related to its density. The denser the metal, the less easily malleable it is.

Both copper and strontium are metals but copper is denser than strontium hence copper is less malleable than strontium.

brainly.com/question/723620

7 0

3 years ago

Read 2 more answers

How does artificial reproduction help in the excess production of fruits

faltersainse [42]

Answer:

Artificial reproduction does help in excess production of fruits. Explanation: Artificial reproduction is a process in which the plants are made to artificially fertilise in order to improve the quality and sometimes the quantity of the by products such as flowers and fruits produced by the plant.

Explanation:

4 0

3 years ago

A kitten is born with one blue eye and one yellow eye. What is the genetic term for this situation and what does it mean?

statuscvo [17]

Complete heterochromia

8 0

3 years ago

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Look at the picture of different food groups. Which two groups are mainly eaten for their energy? Add up the numbers and give th

Citrus2011 [14]

Answer:

fat and carbohydrate

Explanation:

thats the food group

6 0

3 years ago