Answer:
The correct answer is the Tyndall effect. This is also known as the Tyndall scattering. It is the light scattering by the particles in a colloid or in a suspension. This phenomenon is used to determine size and density of particles in colloidal matter.
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Explanation:
b) 24
c) 42
d) 10
The GPS or global positioning system is a satellite – based navigation system made up of a network of 24 satellites placed into orbit by the US Department of Defense. It was originally intended for military applications but later one, it made available for civilian use. It works in any weather conditions, anywhere in the world for 24 hours a day.
evaporation of water from the ocean
condensation of water vapor to form clouds
hydrogen and oxygen gas combining to form water vapor
Answer : The correct option is hydrogen and oxygen gas combining to form water vapor.
Explanation :
Phase change : It is a change from one state to another state without changes in chemical composition.
Phase change such as solid to liquid, liquid to vapor, vapor to liquid, liquid to solid, vapor to solid, solid to vapor.
B. Adolf Hitler
C. Benito Mussolini
D. Joseph Stalin
When balancing the nuclear reaction, explain the following:
How does the Law of Conservation of Matter dictate what the daughter nuclide is?
How do we calculate the atomic mass and atomic number for the daughter nuclide?
Where do we look up what the new daughter nuclide element is?
The balanced nuclear reaction is 234/91 Pa -> 4/2 He + 230/89 Ac. You calculate the atomic mass and atomic number of the daughter nuclide by subtracting the atomic mass and atomic number of the alpha particle from the parent nuclide. Then, refer to the periodic table to identify the element with the corresponding atomic number.
The process described in the question is a typical alpha decay nuclear process. In this reaction, a Protactinium-234 nuclide emits an alpha particle (which is a Helium nucleus) to produce a new nuclide, the daughter nuclide.
According to the Law of Conservation of Matter, the sum of the mass and atomic numbers (protons + neutrons) of the reactants must equal the sum of the mass and atomic numbers of the products. This means we can calculate the atomic number and atomic mass of the daughter nuclide. The atomic mass would be the difference: 234 - 4 = 230. The atomic number would be the difference: 91 - 2 = 89.
After that, you can identify the new element by its atomic number, 89, from a periodic table, which shows it to be Actinium (89/230 Ac).
So, the balanced nuclear reaction is: 234/91 Pa -> 4/2 He + 230/89 Ac
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allowing particles to collect
clumping particles together
attracting the heat of the nebular cloud
Answer: Attracting the heat of the nebular cloud
Heat is lessened by interstellar dust through attraction of heat in the gas cloud. The nebular cloud’s heat, coming from radiation emitted by stars, is indirectly cooled down by dust through ionization and beams it towards space.
Heat is lessened by interstellar dust through attraction of heat in the gas cloud. The nebular cloud’s heat, coming from radiation emitted by stars, is indirectly cooled down by dust through ionization and beams it towards space.
Answer: The correct answer is Option 2.
Explanation:
Natural transmutation is defined as the decay process of the radioactive elements which occur spontaneously by a process that causes transmutation.
Artificial transmutation is defined as the process where artificially induced nuclear reaction is done by the bombardment of nucleus with high energy particles on a radioactive element. It is a spontaneous reaction.
Natural decay or radioactive decay are the processes in which a nucleus disintegrates spontaneously on its own. There are many processes by which this decay takes place.
Hence, the correct answer is Option 2.
Artificial transmutation is the process where an atom of an element is made radioactive by bombardment with high-energy protons. This process was exemplified by Ernest Rutherford when bombarding nitrogen atoms with alpha particles. Thus, changes in atomic structure due to high-energy proton bombardment are results of artificial transmutation.
The change undergone by an atom of an element made radioactive by bombardment with high-energy protons is called artificial transmutation. This is a process of nuclear chemistry, which involves the conversion of one nuclide into another. It can occur through the radioactive decay of a nucleus or via the reaction of a nucleus with another particle.
An example of artificial transmutation was evident in the early work of Ernest Rutherford. In 1919, he bombarded nitrogen atoms with high-speed alpha particles from a natural radioactive isotope of radium and observed protons resulting from the reaction. Thus, artificial transmutation is the process responsible for the alteration in atomic structure when an element becomes radioactive due to bombardment by high-energy protons.
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