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3 years ago

Is buoyancy a physical or chemical property?

1 answer:

7 0

Buoyancy is considered a physical property. It is a type of physical property because it is related to the density and weight of the item, which are both physical.

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Thermal energy from the sun travels to earth as waves

malfutka [58]

Of course it does...

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3 years ago

Read 2 more answers

The number if particles in one molecule is?

igomit [66]

6.022 x 10^23 particles in one molecule

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3 years ago

A forest ecosystem starts with both Sonoran toads and Wood frogs. What would you expect to happen if the ecosystem becomes more

Gnom [1K]

Answer:

i think that sonoran toads would prosper and wood frogs would disappear

Explanation:

because of the provided information

5 0

3 years ago

Column A

baherus [9]

Answer:

The Following are the matching to this question:

$1 \to c\\2 \to b\\3 \to a\\4 \to e \\5 \to d \\6 \to f$

Explanation:

It includes creating assumptions, extracting predictions through logical outcomes, and experimentation observation based on those projections.
Every information gathered only with sense is also an observation. It expresses concern relating to scientific research. It also helps research scientists gather data.
Its independent variable inside an analysis is a controlled variable. It's also called "manipulated," because it can change its parameter, which is controlled one.
The suggested explanation for an occurrence is a hypothesis. It belongs to the scientific method. That's an experimental forecast, which is checked.
The experiment manipulates the important variables, calculates the dependent variable, controls any alien variables.
It "reacts" to improvements inside an experiment that they make. It is the result or consequence of an experiment.

3 0

3 years ago

The half life for the radioactive decay of potassium- to argon- is years. Suppose nuclear chemical analysis shows that there is

Semmy [17]

Answer:

Therefore, the age of the rock sample is 2.7 * 10⁹ years

<em>Note: The question is missing some parts. The complete question is:</em>

<em>The half-life for the radioactive decay of potassium-40 to argon-40 is 1.26 * 10⁹ years. Suppose nuclear chemical analysis shows that there is 0.771 mmol of argon-40 for every 1.000 mmol of potassium-40 in a certain sample of rock. Calculate the age of the rock. Round your answer to significant digits.</em>

Explanation:

Half-life is defined as the amount of time it takes a given quantity to decrease to half of its initial value.

In radioactive isotopes of elements, the half-life is used to calculate the age of the materials in which the radioisotopes are found.

The half-life is related to the age of a material through the following formula:

t = t½㏑(Nt/N₀) / -㏑2

where t is the age of the material;

t½ is the half-life of the material

Nt is the amount of material left after time t

No is the starting amount of material

From the question:

t½ = 1.26 * 10⁹ years

Nt = 1.000 - 0.771 = 0.229

N₀ = 1.000

-㏑2 = -0.693

t = {1.26 * 10⁹ * ㏑(0.229)} / -0.693

t = 2.68 * 10⁹ which is approximately 2.7 * 10⁹ years to two significant digits.

Therefore, the age of the rock sample is 2.7 * 10⁹ years

8 0

2 years ago