Answer;
B. arteriosclerosis
High levels of cholesterol can first lead directly to arteriosclerosis.
Explanation;
Atherosclerosis refers to the buildup of fats, cholesterol and other substances in and on your artery walls (plaque), which can restrict blood flow. The plaque can burst, triggering a blood clot.
Arteriosclerosis can occur when arteries grow thick and stiff and restrict blood flow to organs and tissues in the body. This gradual process, also known as hardening of the arteries, weakens arteries and can develop in various organs, most commonly the heart.
(3) unstable nuclei emit alpha particles
(4) unstable nuclei emit beta particles
The unstable nuclei emit beta particles.
An atom is unstable (radioactive) if these forces are unbalanced; if the nucleus has an excess of internal energy. Instability of an atom's nucleus may result from an excess of either neutrons or protons.
Atoms of I-131 spontaneously decay when the unstable nuclei emit beta particles.
The unstable nuclei undergo spontaneous decay by emitting radiations to attain stability. Stability of isotopes is based on the ratio of neutrons and protons in its nucleus. Although most nuclei are stable, some are unstable and spontaneously decay, emitting radiation.
Hence, option 4 is the answer.
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Answer;
(4) unstable nuclei emit beta particles
Atoms of I-131 spontaneously decay when the unstable nuclei emit beta particles.
Explanation;
-Unstable nuclides undergo spontaneous change or the spontaneous decay by emitting radiations to attain stability. Stability of isotopes is based on the ratio of neutrons and protons in its nucleus. Although most nuclei are stable, some areunstable and spontaneously decay, emitting radiation.
Answer:
Explanation:
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A propane molecule's structure can be understood through the ball-and-stick model where carbon and hydrogen atoms play distinct roles leading to different alkyl groups.
The ball-and-stick model of a propane molecule is built using black spheres to indicate carbon atoms and white spheres for hydrogen atoms. In propane, each of the six equivalent white spheres (hydrogen atoms) are bonded to a black sphere (carbon atom) connected to one other black sphere (carbon atom). The remaining two hydrogen atoms are of a different type as they are bonded to a carbon atom (black sphere) that is bonded to two other carbon atoms. They are represented as purple spheres in this explanation. Adjacently, in 2-methylpropane, we find nine similar hydrogen atoms, but notably, one that differs - represented as a green sphere which is bonded to a carbon atom connected to three other carbon atoms. This unique arrangement allows for the formation of different alkyl groups when certain hydrogen atoms are removed.
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It is reflected.
It is transmitted.
It is either reflected or transmitted.
Answer: It is either reflected or transmitted.
Explanation:
The color of the objects is due to the light reflected to our eyes.The light falls on the surface of the object and the color which does not get absorbed by the object gets transmitted or reflected and thus appear to be of the same color as the reflected or transmitted light.
Example: If an object absorbs all of the frequencies of visible light except for the frequency associated with green light, then the object will appear green in color.
There are 17 known types of elementary particles which include quarks, leptons, and force carriers. Composite particles, such as protons and neutrons, derived from these elementary particles, add to the variety of particles. The total count may change as our understanding of physics evolves.
When we talk about different kinds of particles in the world, we're usually referring to elementary particles, of which there are currently 17 types understood by scientists. These include six types of quarks, six types of leptons, and five types of force carriers (the photon, three types of W and Z bosons, and the gluon). Additionally, there is the Higgs boson, responsible for giving particles their mass. However, it's essential to also consider composite particles, such as protons and neutrons, made up from quarks. The exact number of particle types can be hard to quantify due to discoveries of new particles and our ever-evolving understanding of physics.
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Answer: 1,88×10²³ atoms of Br in 25g of Br
Explanation:
25g Br
1 mol of Br =79,9g Br
Number of Avogadro: 6,022×10²³ = 1 mol
25gBr× 1molBr/79,9gBr =
6,022×10²³ atoms of Br/1 mol Br =
1,88×10²³ atoms of Bromine