PLEASE HELP Which of these could DNA determine?

1. the pattern of a tiger’s stripes
2. the borders of a country
3.the number of dandelions in a field
4.the elements that bond to form water

Answer:

2 hydrogen atoms and one oxygen atoms make h2o/water

Answer:

The water cycle is a series a of reversible changes. The sea water under the action of heat get vaporised which in turn changes into clouds. These clouds provide rain. The rain water then flows to the streams and rivers which eventually falls back to the oceans and seas.

Homeostasis is the process by which a body is able to adapt to different conditions and keep the body in relatively stable internal conditions at all times.

During homeostasis, blood helps regulate the body temperature by eliminating excess heat, maintaining the pH balance of the body, and maintaining the internal osmotic pressure.

The immune system assists in homeostasis by screening and destroying pathogens and helps prevent autoimmunity as well as regulates immune reactions periodically. If the immune system fails to do these processes, then it may result in the appearance of cancer.

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Answer:

c

Explanation:

A. Absorption. Both processes are relatod to the way drugs are absorbed into the system.

The chemical equation given is the combustion reaction of butanol

(\(C_{4} H_{10} O\)) with oxygen gas (\(O_{2}\)) to produce carbon dioxide (\(CO_{2}\)) and water (\(H_{2} O\)). The chemical equation is unbalanced, meaning the number of atoms on both sides of the equation is not equal.

To balance the equation, we need to adjust the coefficients until the number of atoms of each element is the same on both sides. By doing this, we get the balanced equation:

\(C_{4} H_{10} O\) + \(6.5 O_{2}\) → 4\(CO_{2}\) + 5\(H_{2} O\)

In the balanced equation, the coefficient for \(CO_{2}\) is 4, which indicates that four molecules of \(CO_{2}\) are produced for every molecule of butanol burned. This balanced equation shows that during combustion, butanol reacts with oxygen to produce carbon dioxide and water in a specific stoichiometric ratio.

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Answer:

Non Renewable__resources will run out one day._Slowing/stopping__the use of non-renewable

resources now will make supplies last longer. Fossil_Fuels__

are non-renewable resources.

Burning fossil fuels releases_Carbon Dioxide__

which contributes to_Pollution__

change.

Burning_less__

fossil fuel will help to reduce this effect. Accidents with oil rigs or_mines/power plants__

can pollute the sea with oil and kill_wildlife__

Nuclear fuel is non-renewable.It is used in_Nuclear__power stations.

These are very _Expensive__ to build and to _can cause__ Accidents in nuclear power stations can release__dangerous_ materials into the atmosphere

Nuclear fuel is non-renewable. It is used in

power stations. These are very

to build and to

Accidents in nuclear power stations can

release

materials into the atmosphere.



Explanation:

Definitions:

Fossil fuel- A fossil fuel is a fuel formed by natural processes, such as anaerobic decomposition of buried dead organisms, containing organic molecules originating in ancient photosynthesis that release energy in combustion

Fossil fuels produce large quantities of carbon dioxide when burned. Carbon emissions trap heat in the atmosphere and lead to climate change. In the United States, the burning of fossil fuels, particularly for the power and transportation sectors, accounts for about three-quarters of our carbon emissions.

Carbon dioxide from the burning of fossil fuels accumulates in the atmosphere, where it causes global warming. But it also affects our oceans. As carbon dioxide enters the ocean, it reacts with sea water to form carbonic acid. ... That's the equivalent in weight of 500 billion Volkswagen Beetles dumped at sea.

A nuclear power plant is a thermal power station in which the heat source is a nuclear reactor. As is typical of thermal power stations, heat is used to generate steam that drives a steam turbine connected to a generator that produces electricity.

Answer:

the correct answer is A

Explanation:

Dimensional analysis is the unitary method that is used to determine the values by multiplication. The cost of the ice cream sandwiches for the barbecue is 367.5 $.

Dimensional analysis has been defined in maths, physics, and chemistry to solve the problem by multiplying the given numbers to determine the values of the other data. It uses the base quantities to estimate the derived values.

Given,

Number of people at barbecue = 175

Cost of ice cream sandwiches = $1.68 per dozen

The average number of sandwiches per person = 1.25

The cost to buy ice cream sandwiches for the barbecue is estimated by the dimensional analysis as:

12 ice cream sandwiches = $1.68

1.25 ice cream sandwiches = $2.1

If it costs $2.1 for each person then 175 people costs:

$2.1 × 175 = $367.5

Therefore, it will cost 367.5 $ for the barbecue.

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The reaction that is occurring in this question is:

H2 + I2 -> 2 HI

As we can see, the molar ratio for H2 and I2 is 1:1, one mole of H2 for each mole of I2, and the molar ratio between any reactant and HI is 1:2, which means the number of moles of product will be two times more than the number of moles of the reactants

We have:

3.0 moles of H2

2.0 moles of I2

1.0 moles of HI

According to the molar ratio, we should have the name number of moles of I2 and H2, which means that H2 is in excess and I2 is the limiting reactant with 2 moles

If we have 2 moles of I2, and the molar ratio of I2 and HI is 1:2, we should have 4 moles of HI being produced

Therefore the theoretical number of moles is 4.0 moles of HI from 2.0 moles of I2

Answer: both

Explanation:

Dmitri Mendeleev in his Periodic Table organized elements according to their increasing atomic masses.

He then split the elements into several columns so that elements beside each other had similar properties.

The Periodic Table of elements is a table which groups the elements into group and Periods.

The first scientist to produce the Period Table which produced the modern Periodic Table of elements in use was the Scientist Dmitri Mendeleev.

Dmitri Mendeleev organized elements according to their increasing atomic masses.

He then split the elements into several columns so that elements beside each other had similar properties.

In conclusion, the period table of elements arranges elements into columns and groups such that elements beside each other had similar properties.

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Answer:

1: atomic weights

2: properties

Explanation:

I got it right on the test

Answer:Wood for barbucue.

Explanation:

Answer:

4

Explanation:

because those to elements link together creating amazing fractions

Answer:

yer

Explanation:

the differential equation involving the mass of W is m'(t) = Z

The differential equation involving the mass of W is:

m'(t) = Z

where m'(t) represents the rate of change of mass of W with respect to time and Z is the constant rate of production of W.

The general solution to this equation, with C as the constant of integration, is

m(t) = Zt + C

If there were g grams of W initially, then the mass of W after 10 seconds is

m(10) = Z(10) + C + g

Given that the rate of production of W is Zt + 5 gms/sec, and substituting t=0, we get:

m(0) = Z(0) + C + g

=> C = g

Substituting C = g into the general solution, we get:

m(t) = Zt + g

Therefore, the mass of W after 10 seconds is:

m(10) = Z(10) + g

=> m(10) = (Zt + 5)(10) + g = (Z(10) + 5)(g) = 152 (given)

Solving for Z, we get:

Z = (152 - g)/10

Substituting this value of Z into the general solution, we get:

m(t) = [(152 - g)/10]t + g

Substituting t=10, we get:

m(10) = (152 - g)/10 + g = 152.

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Answer:

ones in magnets r close together while others can be spread apart

The purpose of standardization is to calibrate volume markings on a buret known reference value or concentration for a substance or instrument.

The process of standardization involves comparing the unknown value or concentration of a substance or instrument with a known standard value or concentration.

This process is critical in many scientific fields, including chemistry, biology, and engineering, as it ensures that measurements and analyses are accurate and reliable.

Standardization can also help to ensure consistency and comparability between different laboratories, instruments, or experiments.

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Answer: The destruction of crust occurs at deep-sea trenches. Oceanic rocks are pillow-shaped when formed. Rocks across the ocean floor have alternating magnetic stripes. Younger rocks are closer to mid-ocean ridges.

Answer:

Organelles, prokaryotic, organelles, cytoplasm, prokaryotic, nucleus

Explanation:

Organelles are membrane bound only in eukaryotic ccells.

Prokaryotic cells unlike eukaryotic cells, do not have membrane bound organlles.

Something that is found in both prokaryotic and eukaryotic cells is the cytoplasm, which is fluid that is inside the whole cell.

Unlike eukaryotic cells, prokaryotic cells have loose DNA, which floats around the cell quite literally.

The only way DNA is stored in eukaroyotic cells is in the nucelus, which is only found in eukaryotic cells, not prokaryotic.

Hope this helps ;)

Answer:

Half-life = 28.8 years

Explanation:

The radioactive decay of an atom follows the equation:

Ln[A] = -kt + ln[A]₀

Where [A] is actual amount of isotope after time t; k is decay constant and [A]₀ initial amount of isotope

Solving for k:

Ln[0.393g] = -k*10yrs + ln[0.500]

-0.2408 = -k*10yrs

0.02408yrs⁻¹ = k

Half-life, is:

Half-life = ln 2 / k

Half-life = ln 2 / 0.02408yrs⁻¹

Half-life = 28.8 years

The isotope \(38Sr^{90}\) is one of the extremely hazardous species in the residues from nuclear power generation. The strontium in a 0.500-g sample diminishes to 0.393 g in 10.0 yrs, the half-life is - 28.78

Formula:

radioactive decay follows first-order kinetics,  

k = \(\frac{1}{t}ln\frac{a}{x}\)

Given:  

a = initial amount = 0.5 g  

x = amount of isomer after 10 years = 0.393 g  

t= time   = 10 years

Solution:  

k =  \(\frac{1}{10}ln\frac{0.5}{0.393}\)

   = 0.02408  

k = \(\frac{0.693}{t/2}\)  

T(1/2) = half-life time

= \(\frac{0.693}{k}\)

=   \(\frac{0.693}{0.02408}\)

= 28.78 years.

Thus, The isotope \(38Sr^{90}\) is one of the extremely hazardous species in the residues from nuclear power generation. The strontium in a 0.500-g sample diminishes to 0.393 g in 10.0 yrs, the half-life is - 28.78

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The phrase that describes the plate boundary shown is D. is a region where earthquakes occur .

A transform boundary is the name given to this tectonic plate boundary. Two or more plates slip past one another in such a border. This shift is typically accompanied by some highly active earthquakes.

At a transform plate border, the grinding motion between the plates causes shallow earthquakes, significant lateral rock displacement, and a wide zone of crustal deformation. Essentially While no new crust is produced, subducted, or formed, and no volcanoes are formed, the fault produces earthquakes.

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Answer:

they both have gravity

Explanation:

Answer:

gravity

Explanation:

The landform that is a result of the chemical weathering of carbonate rock is

While the chemical weathering of carbonate rock does occur, it can result in voids or cavities under the surface. When sedimentary layers become unstable and unable to support their own weight, a concave impression known as a sinkhole will form.

Sinkholes are prevalent in areas that have an ample supply of carbonate rock, which itself poses a danger due to its potential impact on infrastructure and human well-being. It is important to note that the chemical deterioration of carbonate rock does not typically contribute to natural developments like mountains, dunes, or rivers.

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A potassium atom's ground state electron configuration is 1s2, 2s2, 2p6, 3s2, 3p6, 4s1.

An atom's electron configuration is a picture of how electrons are arranged in relation to orbital shells and subshells. Consequently, this is potassium's electron configuration.

Making Electron Configurations in Writing. Write the energy level (the period) first, then the subshell that needs to be filled, and finally the superscript, which indicates how many electrons are in that subshell. The atomic number, Z, is the sum of all the electrons.

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The percent change in volume is 21 %.

given that :

temperature , T1 = 273 -28 = 245 K

temperature , T2 = 273 + 9 = 282 K

pressure P1 = P

pressure P2 = P - O.O5 P = 0.95 P

Volume V1 = V

volume V2 = ?

using ideal gas equation , we get :

P1 V1 / T1 = P2 V2 / T2

V2 = (P1 V1 T2 ) / P2 T1

V2 = ( P × V × 282 ) / ( 0.95 P × 245 P )

V2 = 1.211 V

change in volume is given as = V2 - V1

                                                 =  1.211 V - V

                                                 = 0.211 V

Percent change in volume is = (0.21 V)) / V ) × 100 %

                                                 = 21 %

Thus, For many purposes we can treat propane C3H8 as an ideal gas at temperatures above its boiling point of −42.°C Suppose the temperature of a sample of propane gas is raised from -28.0°C to 9.0°C, and at the same time the pressure is increased by 5.0% . the percent change in volume in 21 %.

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Answer:

Where is your images?

Explanation:

cant solve the prblm without ur images

The elements can be in terms of their likelihood of being found in nature as follows: Aluminum (Al) > Copper (Cu) > Gold (Au) > Cadmium > Vanadium (V). Aluminum is the most abundant metal in the Earth, making up approximately 8% of its composition.

Copper is the next most likely element to be found in nature. While not as abundant as aluminum, it is still relatively common. Copper occurs naturally in various minerals, including copper sulfides and copper oxides. It is often found with other metals in deposits.  Gold is often associated with geological processes such as hydrothermal activity or erosion. Due to its scarcity and inherent value, gold has been treasured and used for ornamental and monetary purposes throughout history.

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Answer:

Potassium-40 (40K) is a radioactive isotope of potassium which has a long half-life of 1.251×109 years. It makes up 0.012% (120 ppm) of the total amount of potassium found in nature.

...

Potassium-40.

General

Natural abundance 0.0117(1)%

Half-life 1.251(3)×109 y

Parent isotopes Primordial

Decay products 40Ca (β−) 40Ar (EC, γ; β+)