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____ [38]
3 years ago
6

The element ________ is used in nuclear fission to produce energy.

Biology
2 answers:
Gemiola [76]3 years ago
5 0

The right answer is Uranium (especially U-235).

Nuclear fission is the phenomenon by which a heavy atomic nucleus (that is, formed of a large number of nucleons such as uranium, plutonium, etc.) is split into two or more lighter nuclides.

This nuclear reaction is accompanied by the emission of neutrons (generally two or three) and a very important energy release (≈ 200 MeV (megaelectronvolt) per fissioned atom, compared to the energies of the chemical reactions which are the order of the eV per atom or molecule reacting).

dimaraw [331]3 years ago
3 0
Uranium is the answer
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Pine cone seeds are produced in the __ of the __ cone. please help me out.!!
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Pine cone seeds are produced in the <u>ovules</u> of the <u>female</u> cone.

Pine trees are evergreen coniferous trees with the presence of the characteristic needle like photosynthetic leaves. Pine trees have both the male and female cones on the same tree and are monoecious. The male cones are short lived and fall off after shedding pollen grains. The female cones are long lived and contain the ovules which are fertilized by the pollen to form seeds. Each female cone has spirally arranged scales with two seeds on each scale. On maturity, the cones release the seeds and are dispersed by wind or birds.

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Describe the general types of diagnostic tests used to diagnose patients infected with HIV.
GenaCL600 [577]

AIDS

This disease leads to death by weakening the immune system of the human body.  Common symptoms are related to the nervous system like dementia, anxiety, depression and insomnia.

TESTS

The tests for AIDS are discussed below.

The most common test for any disease is the blood test.  

When human body is infected with the virus, the body produces anti-bodies to combat this infection. The blood test is positive if these anti-bodies are present in the blood sample of the infection person. However, it takes time for these anti-bodies to appear in the blood stream, hence, blood test should be done at regular intervals.

The tests specifically developed for AIDS are as follow.

ELISA or Enzyme-linked immunosorbent assay

If this test is positive, this is followed by a Western Blot test. The blot test is done in order to confirm the disease.

As said before, anti bodies take time to develop. If the test is done during this phase, it will be negative despite of the presence of virus in the blood stream.

HOME

Only one home test is approved. This is called Home Access Express Test. The kit of this home test is available at pharmacies.

SALIVA

The saliva from the patient’s cheek is obtained on a cotton pad. This pad is put in a vial which is then sent to the lab for testing.  If the result is positive, blood test is done to confirm the disease.

VIRAL LOAD

As the name suggests, this test measures the quantity of virus present in the blood. This test is done to either test the presence of HIV or to track the progress of the treatment of HIV.

WESTERN BLOT

This test is done when the result of ELSA test is positive. This test confirms the disease.

All the above test if turn out negative and the patient still doesn’t recovers, this testing should be done periodically until the disease is confirmed.

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3 years ago
Sodium is an example of an alkali metal. The alkali metals are found in the leftmost column of the periodic table, known as Grou
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Answer:

The reactivity greatens the farther you go down on the periodic table. Lithium will have the weakest reaction, and cesium will have the greatest reaction. Patterns like this are useful to scientists because it shows which elements are the most reactive and which aren't. The farther down and to the left you go within the periodic table, the more reactive the elements become. The farther up and to the right you go, the less reactive they become.

Explanation:

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If a compound had the chemical formula: C6H12O2, is it a carbohydrate or a lipid?
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Carbohydrates.............
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