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3 years ago

Which of the following hypotheses is testable by using the scientific method?

Chemistry

1 answer:

Troyanec [42]3 years ago

7 0

Answer:

Explanation:

The only hypothesis that is testable using the scientific method would be that all swans are white.

The scientific method involves a series of steps through which scientists are able to arrive at a conclusion about the natural world. The steps include observation, drawing up falsifiable hypotheses from observations, testing the hypotheses using experiments, and then arriving at conclusions based on the data gathered from the experiment.

There is no way to test the mortality of all men as this will require harming humans in order to prove their mortality. The best color is also subjective as individuals have their preference when it comes to color. There is no way to prove the hypothesis that no life exists on other planets as this will require visiting other planets, a gesture that is practically impossible. That swimming is fun can also be subjective. Not everyone finds swimming interesting.

The hypothesis that all swans are white can be tested by sampling the population of swans in different areas and recording their colors objectively.

Hence, the correct option is d.

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Which particles give the nucleus its positive charge?

Mnenie [13.5K]

Answer:

protons only

Explanation:

proton is present in the nucleus of atom as sub atomic particle ..

proton has + charge in the it's top as p+..

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3 years ago

Is corrosion of aluminum metal a chemical or physical process

nadya68 [22]

Corrosion of aluminium metal is a chemical process. Corrosion happens when a certain chemical reaction takes place.

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4 years ago

Lithium and nitrogen react to produce lithium nitride:

garri49 [273]

Answer:

B : 0.133 M

Explanation:

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3 years ago

One container is filled with argon gas and the other with krypton gas. If both gases have the same temperature, in which contain

alina1380 [7]

Answer:

Argon

Explanation:

The average kinetic energy of the particles in a gas is given by

$KE=\frac{1}{2}mv^2$

where

m is the mass of the particles

v is their rms speed

The average kinetic energy of the particles in a gas can also be written as

$KE=\frac{3}{2}kT$

where

k is the Boltzmann's constant

T is the absolute temperature of the gas

Combining the two equations,

$\frac{1}{2}mv^2=\frac{3}{2}kT$

We can re-write the equation as

$v=\sqrt{\frac{3kT}{m}}$

We see that:

- The speed is directly proportional to the square root of the temperature

- The speed is inversely proportional to the square root of the mass of the particles

Therefore, if the two gases are at same temperature, the particles will move faster in the gas with lighter particles (smaller mass).

Since Krypton atoms have larger mass than Argon atoms, it means that atoms in Argon move faster than in Krypton.

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3 years ago

In which process are simple materials chemically combined to form to more complex materials.

IgorC [24]

1. synthesis

because it is the only option which is a form of manufacturing complex materials

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3 years ago