PLEASE HELP ME PLEASE

Answer: For many calculators, including the TI –83 and TI 83 Plus, the [EE] button is used to enter scientific notation. The [EE] button can be found in yellow above the comma key [,].

Answer:

when cell is exposed to radiation we get brain tumour or cancer.

Answer:

Radioactivity is typically a high-energy wave that passes through cells and causes damage to them. However, there are different types, and they have very different effects on our body.

First, we have alpha particles. They're the biggest of all the types of radiation particles, therefore lacking the energy and speed to penetrate your skin, and typically won't do much damage from outside your body. Inside you body, however, it will wreak havoc on your sensitive tissues, and cause severe damage to cells and DNA. These situations typically happen in unfortunate events where a person inhales or swallows an alpha-emitter.

Next, we have beta particles. These are typically smaller than alpha particles, and hence have more speed. They can penetrate skin and get into our body but are typically less damaging to our inside tissues due to their ionization being weaker than those of alpha particles. They can also typically be stopped by a layer of clothing or a thin sheet of aluminum, but be prepared for some damage if the beta particles get inside your body through inhaling beta-emitters, for example.

Coming up are gamma rays, which are packets of energy like photons that are similar to visible light but have much, much higher energy. These are typically known as the most dangerous of radioactivity, due to their energy that will absolutely rip apart and destroy DNA or cells, and their incredible penetrative energy that will take at least a few meters of dense materials like lead or even concrete to stop.

Finally, we have X-rays. Similar to gamma rays, they are also little photons that act like visible light but have a lower energy than gamma rays, hence having less penetrative power. They are most known for their uses in medicine in X-ray scans to see the insides of a patient, or for their uses in CT scans to diagnose patients.

Hope this helped!

Answer: In a chemical reaction substances elements and compounds called reactants are changed into other substances compounds and elements called products.You can't change one element into another in a chemical reaction that happens in nuclear reactions.

Explanation:

Answer:B

Explanation:

Answer:

Here is a clue

Explanation:

A convenient ion exchange separation particularly designed for the separation of iron and vanadium or mangenese from cobalt has been developed for the determination of iron, cobalt and manganese or vanadium in soft magnetic alloys. After an anion exchange separation of their chloride complexes these elements are determined by a back titration of an excess of EDTA with a standard copper solution using calcein as an indicator under ultraviolet light.

Answer:

I THINK it's vanadium but I'm not 100% sure

Explanation:

Answer:

True

Explanation:

Sorry i'm late probably but i answered this for you :) i hope this helps though

It is true that all circuits must have three things: energy source, wire, and a generator.

A circuit in electronics is a complete circular path through which electricity flows.

A basic circuit is made up of a current source, conductors, and a load. The term circuit can be used broadly to refer to any fixed path through which electricity, data, or a signal can travel.

Circuits are classified into five major types: closed circuits, open circuits, short circuits, series circuits, and parallel circuits.

An electric circuit consists of a device that provides energy to the charged particles that make up the current, such as a battery or a generator, as well as devices that use current, such as lamps, electric motors, and so on.

All circuits must include three components: an energy source, wire, and a generator.

Thus, the given statement is true.

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Explanation: pH is a measure of whether water is acidic or basic. Fish have an average blood pH of 7.4, so pond water with a pH close to this is optimum. An acceptable range would be 6.5 to 9.0. Fish can become stressed in water with a pH ranging from 4.0 to 6.5 and 9.0 to 11.0.

Answer:

F

Explanation:

i dont know how water vapor would hit the ocean and go underground? so i think its F

Answer:

Functional diversity is a wide range of individuals who have unique selves in one community.

Answer:

B are made of only one type of tissue

Explanation:

Idon 't know if this correct I'm not sure

Answer:

1.67 moles SiC

Explanation:

Given Rxn   SiO₂ + 3C => SiC + 2CO

Given mass => 5 moles C => ? moles SiC will be formed  

Mass (moles) SiC yield = 1/3(5moles) = 1.67moles SiC

Solution Analysis:

Look at the balanced equation and note the coefficients of the given and unknown. In the above case, the balanced equation shows 3 moles Carbon to 1 mole Silicon Carbide. Since the coefficient for SiC is smaller than the coefficient for C then one should get a yield of SiC smaller than moles of C given. To calculate the yield based on these two compounds make a ratio of coefficients such that when multiplied by the given (5 moles in this case) one obtains a number smaller than 5. That is, 1/3(5 moles) = 1.67 moles SiC. Note that the moles of SiC (=1.67) is smaller than moles of C (=5 moles).  You certainly would not get a smaller number than 5 if you used the ratio 3/1(5) moles = 15 moles. Wrong!

Here’s another example:

Given Rxn => 3H₂ + N₂ => 2NH₃  

Given 7 moles H₂ calculate the moles of NH₃ produced.  

Solution:  

Note the known is moles H₂ and NH₃ the unknown. From the balanced equation note the coefficient of NH₃ is smaller than the coefficient for H₂. Therefore using the coefficients of H₂ (3) and NH₃ (2) form a ratio such that when multiplied by the given 7 moles one gets a smaller number (the answer needed).

Therefore, mass (moles) NH₃ produced = 2/3(7) moles NH₃ = 3.33 moles NH₃ produced from 7 moles of H₂.  3.33 < 7 as defined by balanced equation.

Rule of Thumb...

When working equation problems, first convert all given data to moles and then use the ratio of coefficients to make the given smaller or larger as defined by equation. Then, if needed, convert moles to desired dimension for problem given.

Answer:

white light is made up of all colors of the rainbow

Explanation:

The white light of the sun is made up of all the colors of the rainbow. Therefore, option (4) is correct.

A rainbow can be described as a meteorological phenomenon that is caused by refraction, reflection, and dispersion of light in water results in a spectrum of light appear in the sky. It occurs in the form of a multicolored circular arc in the sky directly opposite the Sun.

Rainbows can be full circles but we normally see only an arc of illuminated droplets above the ground. In a primary rainbow, the arc indicates red on the outer and violet on the inner side. When the light is refracted when entering a water droplet, then reflected inside the back of the droplet and refracted again.

When the light enters a water droplet, it slows down and bends as it goes from air to denser water. The light reflects back the inside of the droplet and when light exits the droplet, it creates a rainbow.

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Answer:

130 Liters

Explanation:

if 1 mol is 22.4 L, then 5.8 mol is 130 L (129.92 but use sig figs)

Answer:

yes

Explanation:

very

Answer:

Yes a billion percent

Explanation:

Answer:

How many water molecules would be produced in making a polypeptide that is 72 amino acids long by dehydration reactions? 71; one less than the number

Explanation:

Answer:

seven litres i

i.e three litres plus four litres

Answer: Chemical engineers use chemistry and engineering to turn raw materials into usable products, such as medicine, petrochemicals, and plastics on a large-scale, industrial setting. They are also involved in waste management and research. They may be involved in designing and constructing plants as a project engineer.

Explanation:

Answer: 60 degrees Celsius

Explanation:

Answer:

36s^5

Explanation:

We have;

M2X3 (s)------> 2M^3+(aq)  + 3X^2-(aq)

If [M^3+(aq)] = [X^2-(aq)] = s

We then have;

Ksp = (2s)^2 * (3s)^3

Ksp = 4s^2 * 9s^3

Ksp = 36s^5

Note that Ksp is known as the solubility product. It is an equilibrum equation that shows the solubility of a solute in water.

Answer:

b

Explanation:

answered it correctly

Answer:

B and .08 Moles

Explanation:

Answer:

the volume of the gas will be 1/8 of the original value

Explanation:

Answer:

The black snakes will survive and reproduce while the orange snakes die out.

Explanation:

The orange snakes will be easier to see by their prey and predators, and therefore will die out while the black snakes thrive because of their camouflage.

Answer:

the black snakes will survive and reproduce, therefore, passing their traits to their offspring, while few orange snakes will remain in the population.  

Explanation:

C They together help recycle important elements in nature.

This is because photosynthesis removes carbon dioxide and creates oxygen while cellular respiration does the opposite. This results in no increase or decrease in any of the elements, and therefore means there needs to be a cycle.

A. They have performed an experiment once and reported their findings.

Answer:

Hahah

Explanation:hahah

Answer:

T₂ = 150 K

Explanation:

Given data:

Initial volume of gas = 804 mL

Initial temperature = 27°C (27+273=300 K)

Final temperature = ?

Final volume = 402 mL

Solution:

The given problem will be solve through the Charles Law.

According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.

Mathematical expression:

V₁/T₁ = V₂/T₂

V₁ = Initial volume

T₁ = Initial temperature

V₂ = Final volume  

T₂ = Final temperature

Now we will put the values in formula.

V₁/T₁ = V₂/T₂

T₂ = V₂T₁/V₁  

T₂ = 402 mL × 300 K / 804 mL

T₂ = 120,600 mL.K / 804 mL

T₂ = 150 K