CHEMISTRY MIDDLE SCHOOL

Is skin cancer sex linked

Answers

Answer 1
Answer: Sexually tranmsitted? No. Genetic? You can be more suseptible to certaincancers for genetic reasons, but you can't have cancer in your geneticmakeup. Cancer is indeed a mutation of the cells, where they forget tonaturally die off, and spread.

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the problem say what is the volume (in kL) of 3.7505 x 10^4 mg of iron? Iron has a density of 7.87 g/ml. Use correct significant figures
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An atomic nucleus is composed ofA)protons.B)protons and neutrons.C)protons and electrons.D)protons, neutrons, and electrons.

Which of the following energy changes occurs as a bow is drawn and released?1. gravitational potential to chemical potential
2. magnetic potential to kinetic
3. elastic potential to kinetic
4. kinetic to thermal

Answers

Answer: The correct answer is 3.

Explanation: As the bow is drawn and released, it will experience a change in elastic potential energy to kinetic energy.

Elastic potential energy is defined as the amount of potential energy which is stored as a result of the deformation of the object which has some elasticity in it. For Example: Stretching of a spring, Drawing of a bow, etc..

Kinetic energy is the energy of the object which is possessed as a result of its motion.

When the bow is drawn, it first had some elastic potential energy and when it is released it had some kinetic energy in it.

Conclusion: The correct answer is 3.
3. elastic potential to kinetic
Mechanical energy is the top suject while it has two types: Kinetic energy which is the energy in motion and potential energy which is the energy in reserve. The measure of both energy in motion and reserve is called Joules. Joules then is the International System of Measurement unit for energy, this is mainly used to account for scaling energy in all aspects. 

What element is found in liver and is needed to prevent anemia or tired blood.

Answers


The element found in the liver that helps prevent anemia is iron.

Iron is an essential element for blood production. Close to 70% of the body's iron is found in the red blood cells. In the red blood cells it is a vital ingredient of hemoglobin, the red pigment that gives blood its red color. In the muscle cells, iron is found as myoglobin.

Iron is stored mostly in the liver as ferritin or hemosiderin.

When iron stores are finished or exhausted, the condition is called iron depletion. When the shortage of iron is severe, it results in a condition known as iron deficiency anemia whereby the red blood cells do not have enough hemoglobin.

Which best explains why metal cooking utensils often have plastic coating on the handles

Answers

Metal solids contain a positively-charged cation surrounded by a "sea" of delocalised, negatively-charged electrons.

The electrons are able to move freely, and hence transfer kinetic energy throughout the implement at a much quicker rate than non-metals.

Plastic is made of non-metals (Mostly carbon and hydrogen) and therefore is a poor thermal conductor.

Therefore, by coating the metal utensil in plastic, the rate of heat energy transfer to the person in contact's hand is decreased.

Answer:

Plastic reduces the transfer of thermal energy to hands holding the utensils.

Explanation:

How can the boiling point of a liquid be raised without adding soluble impurity?

Answers

insoluble impurities donot raise the boiling point of a solution. it could be explained from raoults law that vapor pressure of the solution is affected by the partial vapour pressure of components in the solution.
         That is if the solute is not dissolved in a solution then how could it raise the boiling point. It wont affect its boiling point at all.

In the mitochondrion, small molecules combine with (.) to produce (.) and carbon dioxide This process releases a large amount of (.)

Answers

In the mitochondrion, small molecules combine withoxygen to produce water and carbon-di-oxide. This process releases a large amount of energy.

Explanation:

  • The mitochondrial membrane is where the chemical processes happen, and where the fluid contains the matrix.
  • It form an integral part of eukaryotic cells. Its principal function is to conduct cellular respiration. This implies that the cell sucks in nutrients, breaks it down and transforms it into energy.
  • The oxygen present inside the cell is applied and mitochondria transform chemical energy from food in the cell into energy in a form that is accessible to the host cell, understood as oxidative phosphorylation, it occurs within mitochondria.
  • The processes identified as the citric acid or Krebs cycle generate a chemical called NADH in the mitochondria matrix. NADH is then used to produce adenosine triphosphate (ATP) through enzymes located in the inner cone of the mitochondrial membrane.
  • Within ATP the energy is contained within chemical bonds form. You can open those bonds and retrieve the energy.

In terms of ecological succession,an undisturbed community tends to become __________ over time

Answers

It becomes more stable over time

Answer:

more stable

Explanation:

In terms of ecological succession, a community tends to become more stable over time.

As an ecosystem changes over time, species best adapted to that habitat tend to replace other, lesser adapted species until an equilibrium is reached. When drastic changes in the numbers and types of species cease to occur, the community has reached a climax state.
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