The climate zones lying between 23. 5° and 66. 5° north and south latitude are called the.

structural, plant and animal cells are very similar because they are both eukaryotic cells. they both contain membrane-bound organelle such as the nucleus, endoplasmic, mitochondria etc

Answer:

a

Explanation:

its in-between

37 and 36

Answer:

The answer should be A because it doesn't say if rounded then it would be B.

In a stereospecific reaction, the reactant must possess specific characteristics that determine the stereochemistry of the resulting product.

These characteristics include the presence of stereocenters or chiral centers in the reactant molecule. A stereocenter is an atom, typically carbon, that is bonded to four different substituents, resulting in non-superimposable mirror image structures. The presence of a stereocenter allows for different possible spatial arrangements of atoms, giving rise to stereoisomers.

To ensure stereospecificity, the reactant must have a defined stereochemistry at the stereocenter, meaning that it is in a specific geometric configuration (R or S). The reactant's stereochemistry determines the spatial arrangement of atoms in the product molecule. In a stereospecific reaction, the reactant's stereochemistry remains unchanged during the reaction, and the product is formed with the same stereochemistry as the reactant.

It is important to note that not all reactions are stereospecific, and some reactions may result in a mixture of stereoisomers or racemic mixtures where the stereochemistry is not preserved. Stereospecific reactions play a crucial role in the synthesis of pharmaceuticals, natural products, and other compounds where precise stereochemistry is essential for their biological activity or physical properties.

Know more about stereospecific reaction here:

https://brainly.com/question/30849463

#SPJ11

Answer:d

Explanation:

Answer:

0.756 J

Explanation:

Temperature change (delta T) = 0.855 degrees Celsius

Mass of water (m) = 0.2067 g

Specific heat capacity of water (c) = 4.28 J/g degrees C

Heat added = m * c * delta T

= (0.2067 * 4.28 * 0.855) J

= 0.756 J

An object whose density is 1.98 x 10³ kg/m³ has a mass of 35.4 g, it has  17.878 \(m^{3}\)cubic.

We can calculate what materials will float and sink whenever placed in a liquid using the concept of density, which is a crucial idea. As long as an object's density is lower than that of the liquid's density, it will often float.

Density is the ratio of mass as well as volume. It will be denoted by the symbol d.

Given data:

Density = 1.98 × \(10^{3}\) kg/m³.

Mass = 35.4 g

Volume = ?

Volume can be determined by the formula:

Density = mass / volume

Volume = mass / density

Now, put the values of mass and density in above equation.

Volume = 35.4 g/ 1.98 × \(10^{3}\) kg/m³.

Volume = 17.878 \(m^{3}\).

Therefore, the cubic will be  17.878 \(m^{3}\).

To know more about density

https://brainly.com/question/2289452

#SPJ1

The idea of the atomic nature of matter was first developed by John Dalton.

He introduced the atomic theory, which proposed that matter was made up of tiny, indivisible particles called atoms. This theory was based on his observations and experiments on the behavior of gases

.Dalton's atomic theory had several postulates that helped explain the properties of matter. These postulates were:

All matter is made up of atoms, which are tiny, indivisible particles

.Each element is composed of atoms that are identical in size, shape, and chemical properties.

Atoms of different elements have different sizes, shapes, and chemical properties.

Atoms combine in fixed ratios to form compounds, and the ratios of their masses are related by whole numbers.

Atoms are indestructible and cannot be created or destroyed in chemical reactions

.However, Dalton's atomic theory was later modified and expanded upon by other scientists, including J.J. Thomson, Ernest Rutherford, and Niels Bohr, as new discoveries about the structure and behavior of atoms were made.

To know more about Dalton's atomic theory, visit:

https://brainly.com/question/1403872

#SPJ11

According to the VSEPR formula, a molecule of type AB2E2 consists of one A core atom, 2 bound B atoms, and two bound E atoms.

The valence surface electrophile repulsion (VSEPR) theory predicts the 3-D form of molecules based on the quantity of outermost shell electron bond groups that exist between both atoms within a molecule or ion.

This hypothesis states that electron couples will arrange themselves to minimize the effects of their mutual repulsion.

Pairs of electrons repel one another irrespective of whether they are bonded together or functioning independently, according to the basic premise of the VSEPR theory. Two electron sets are referred to as "groups."

Learn more about  VSEPR theory at

https://brainly.com/question/28775578?referrer=searchResults

#SPJ4

The substance in the image above would be classified as a mixture of elements (option E).

A compound is a substance formed by chemical bonding of two or more elements in definite proportions by weight.

On the other hand, a mixture is made when two or more substances are combined, but they are not combined chemically.

According to this question, an image is shown with two different substances or elements as distinguished by coloration (white and purple). These elements are combined but not chemically bonded, hence, is a mixture.

Learn more about mixture at: https://brainly.com/question/12160179

#SPJ1

Explanation:

mantle

Convection currents in the Earth occur in the mantle. The core of the Earth is extremely hot, and material in the mantle close to the core is heated

The oxidation number of S in H2SO is +0.

The oxidation number of O in H2SO is -2.

The oxidation number of H in H2SO is +1

Phosphate is any salt or ester of phosphoric acid with the chemical formula PO₄³-

According to this question, a chemical compound with the formula; FePO₄ was given. The iron ion has a 3+ charge and the phosphate ion has a 3- charge.

Charge of an ion can be estimated by finding the difference between the number of protons and electrons in the atom.

Phosphate is an ion with charge of -3, hence, it complements an iron ion with charge +3 to form a neutral compound.

Learn more about phosphate at: https://brainly.com/question/30594957

#SPJ1

The solvent level has to be below the starting line of the TLC, otherwise, the spots will dissolve away.

The solvent is a substance, ordinarily, a liquid, in which different materials dissolve to form a solution.

The term 'solvent' is carried out to a large number of chemical materials which are used to dissolve or dilute different substances or substances. they are typically organic beverages. Many solvents also are used as chemical intermediates, fuels, and as components of a wide variety of merchandise.

Due to its polarity and potential to form hydrogen bonds, water makes an outstanding solvent, which means that it is able to dissolve many different sorts of molecules. A solvent is a substance that dissolves a solute, resulting in an answer. A solvent is mostly a liquid but can also be a strong, a fuel, or a supercritical fluid.

Learn more about solvent here:-https://brainly.com/question/25326161

#SPJ4

Answer:

Me to I need help please

Answer:

Brainliest-

Explanation:

The molarity of the lithium chloride solution is 0.671 M.

Molarity is a unit of concentration used to measure the amount of solute dissolved in a given volume of solution. It is defined as the number of moles of solute dissolved in one liter of solution, and its unit is moles per liter (mol/L).

To calculate the molarity of the solution, we need to divide the number of moles of solute by the volume of solution in liters.

Molarity = moles of solute/volume of solution in liters

In this case, we are given that 1.59 mol of lithium chloride is dissolved in enough water to make 2.37 L of solution. Therefore, the molarity will be calculated as

Molarity = 1.59 mol / 2.37 L

Molarity = 0.671 M

To know more about molarity here

https://brainly.com/question/8732513

#SPJ4

It will take approximately 90 years for the mass of the sample of cesium-137 to decrease to 2.5 grams.

The half-life of cesium-137 is 30 years, which means that every 30 years, the mass of the sample will be halved.

Let's use N(t) to represent the mass of the sample of cesium-137 at any given time t, where N(0) = 40 grams is the initial mass. After one half-life, the mass will be halved, so N(30) = 20 grams. Similarly, after two half-lives, the mass will be halved again, so N(60) = 10 grams.

We can use the following formula to find the mass of the sample at any given time:

\(N(t) = N(0) * (1/2)^{(t/30)}\)

where t is the time in years.

We want to find out how long it will take for the mass of the sample to decrease to 2.5 grams. So we set N(t) = 2.5 grams and solve for t:

\(2.5 = 40 * (1/2)^{(t/30)}\)

Divide both sides by 40:

\(0.0625 = (1/2)^{(t/30)}\)

Take the natural logarithm of both sides:

ln(0.0625) = (t/30) x ln(1/2)

Solve for t:

t = (ln(0.0625) / ln(1/2)) x 30

t ≈ 90 years

For more question on mass click on

https://brainly.com/question/30459977

#SPJ11

Answer:Hola TvT

Explanation:When the Martian polar caps were first viewed through telescopes, most scientists believed that they were made of water ice, like the polar caps on Earth. Like Earth, Mars has a North and South Pole. But while Earth's polar ice caps consist solely of water ice, Mars' polar caps are a combination of water ice and carbon dioxide ice. As the Martian seasons change, the carbon dioxide ice sublimates (vaporizes) in summer, revealing the surface, and freezes again in winter. As fall approaches, in each respective hemisphere, clouds begin to form over the polar region and the ice cap begins to grow. In spring, the polar caps recede...........Aside from ice, Mars' polar regions have some interesting geologic features. The north polar dune field is a vast concentration of sand dunes that stretches around the entire north polar cap. In some areas, the sand measures up to 500 km (300 miles) across. When the dunes begin to thaw in spring, dark spots form on their surfaces. The north polar dunes were first seen during the 1972 mapping of Mars by Mariner 9, and they are identical to dunes in Earth's desert regions..

bye bye UnU

Answer:

SCHOOL ON MARS

Explanation:

his post first published on How We Get To Next.

When we dream about the future of education, we think of neural implants, robot tutors and hovering desks.

We don’t treat it as a question of urgency. Technology, not pedagogy or the needs of civilization, animates discussion. This won’t do in a place like Mars, in an atmosphere where, as Elon Musk puts it, “your eyes and skin would peel away like sheets of burning paper.”

Despite the harsh environment, perhaps Musk will turn out to be right and someday you’ll wake up as one of the thousands—or even millions—of settlers sent to Mars to “safeguard the existence of humanity.” Life will be limited, largely cut off from Earth; new supplies will arrive only once every 26 months. Or maybe you’ll wake up on the surface of the Moon, or in a giant spacecraft, suspended in orbit. It’s claustrophobic. Hostile. You can’t go home.

Now, imagine the children of these new pioneers. The ones who will determine the fate and shape of humanity’s future. What will they need to learn to be able to survive? To graduate? To be employable? What will the teachers and classrooms of space look like? What skills will they focus on?

If we are to survive and flourish in this brave new world, we will have to take these questions seriously. We will need to get the best out of every person, learn how to work in harmony with intelligent machines, and ensure that our common history is preserved.

In space, a failing education system will mean the end of humanity.

Let’s think ahead. Let’s ask how the purpose of education — to build community and unleash human potential — can answer the needs of humans in space. We won’t know exactly what that future will look like, but we can make certain assumptions and then work backward from there. By doing so, we’ll glimpse the answers that will prepare us for space (or an increasingly automated Earth).

A few assumptions, then. These space pioneers (whether imagined by NASA in the 1980s or at a TED Talk in 2015) will face a hostile environment. They will need to manufacture or extract all of the essentials — water, food, oxygen from their local environment. Survival will require a constant attention to technology and manufacturing. Everyone will need to contribute.

Pioneers will be limited in communication options. If the ability to communicate with Earth exists, it will depend on lasers and satellites. Otherwise, there will need to be the creation of new networks and satellites.

This future will be isolated. Living areas will be at a premium. There will be a lack of any stabilizing social forces. There will need to be a new code of government. Cut off from their home nations, pioneers will lack the luxury of feuding over cultural or national differences.

So in this void, education will need to do three things:

1. Rapidly equip humans to survive and thrive

Each student will need to quickly contribute to survival and growth. That means effective teaching, invisible assessment and progression based on what you know, not how long you’ve been there. Time will be a scarcity. The idea of measuring learning in hours, sitting still for a three-hour test or waiting 18 to 22 years for a “graduation” will seem ludicrous.

For Gerald Huff, a principal engineer at Tesla Motors, this will mean a mastery-focused environment, an apprentice-oriented education. “Resources that sustain life will be expensive,” said Huff. “It will be a technical environment. Shop class will be part of the basics of life. Think about Star Trek. On a basic level, everyone knew how the ship worked.”

Course work will need to be practical, not just designed to tick a box. Arts and literature will need to be part of real work. We can see the roots of this in the movement of schools offering rigorous, project-based learning. The problem-solvers ensuring that students, such as the ones at London’s School 21, create “beautiful work” offering real meaning to society.

Look to the Conrad Challenge for a model of this type of future education. Established in honor of Charles “Pete” Conrad, the third man to walk on the Moon, the Conrad Foundation challenges students to create solutions that will benefit humanity. Reaching students from over 136 countries, finalists are paired with mentors and led through design thinking.

“To survive in a place completely hostile to the human body, we will need to prepare people differently,” said Nancy Conrad, founder of the foundation. “We will need to build education around competencies, showing what you know. We will also need to provide the frameworks and guidance to prepare people to innovate every single day.”

Students have so far developed a membrane to distill and reuse water in space, a new type of space helmet, and a device to aid people struggling with hand tremors—along with countless other patents, collaborations and new ideas.

Education in space will need to unleash this type of innovation and productivity.

The given chloride level in Michelle's blood is 0.55 g/dL. Now we need to convert this value into milliequivalents per liter.

Chloride has a molar mass of 35.45 g/mol. The equation for calculating milliequivalents per liter is:milliequivalents per liter (mEq/L) = (mass in g / molar mass) x 10So, milliequivalents per liter (mEq/L) of Michelle's blood is:0.55 g/dL = 0.55 x 10 / 35.45 mEq/L (since 1 dL = 1000 mL)0.55 x 10 / 35.45 ≈ 0.1561 (rounded to four significant figures)So, the value of chloride level in milliequivalents per liter in Michelle's blood is approximately 0.1561 mEq/L (to two significant figures, the answer is 0.16 mEq/L).Thus, the correct answer is IVAL 0.16 mEq/L.

To know more about molar mass , visit ;

https://brainly.com/question/837939

#SPJ11

Energy levels of electrons (n) indicates the distance of the energy level from the nucleus values of n are positive integers n=1 is closest to the nucleus, and lower in energy

Any system which is in bounded state is consider to have negative potential energy and negative total energy.

The energy of the electrons rotating in the energy level is given as,

\(E_{n} = - 13.6/n^{2} eV\)

So, on increasing value principle quantum number (n) the energy of the level is become higher.

The first energy level can contain  to 2 electrons , the second energy levels can contain 8 electrons and third energy levels can contain  18 electrons and fourth energy levels can contain  32 electrons

learn about energy levels

https://brainly.com/question/17396431

#SPJ4

The density of water at room temperature is 1.0 g/ml.

Density is defined as the mass per unit volume. It gives the denseness of a given substance in a specific space. Different substances have different densities.

The formula to calculate the density is:

                                        ρ =m/v

where,

ρ is the density, m is the mass of the object and V is the volume of the object. The SI unit of density is kg/m³, but we use g/ml for our convenience.

For example, the density of water is 1000 kg/m3 but we convert it into 1.0 g/ml.

If you need to learn more about density, click here

https://brainly.com/question/952755?referrer=searchResults

#spj4

Answer:

It is a single replacement (SR) reaction also known as displacement reaction

Explanation:

Here, we want to write the equation of reaction for the single replacement of magnesium and cadmium (II) nitrate

Magnesium ion is higher up than cadmium (ii) ion in the electrochemical series. What this means is that it can displace it from its salt

We have the equation of reaction in words as:

Using their symbols, we have the equation above as:

Answer:

0.136mol

Explanation:

Using the general gas law equation as follows:

PV = nRT

Where;

P = pressure (atm)

V = volume (Litres)

n = number of moles (mol)

R = gas constant (0.0821 Latm/mol K)

T = temperature (K)

K = °C + 273

K = 50°C + 273

K = 323K

According to this question, P = 3.6atm, T = 323K, V = 1.00L, R = 0.0821 Latm/mol K, n = ?

3.6 × 1 = n × 0.0821 × 323

3.6 = 26.52n

n = 3.6/25.52

n = 0.1357

n = 0.136mol

Answer:

a

Explanation:

Li will have + charge and Cl with - charge.. Positive and negative attract each other forming ionic bond

The correct option is (a) The lithium ion are the chlorine ion will be attracted to each other.

Learn more about lithium and chloride brainly.com/question/3487113

#SPJ2

After considering the given data we conclude that the answer to sub question are
a) the momentum of particle B is -p to the right.
b) the momentum of particle B is -3p/25 to the right.
c) Particle B: E = 0.511 MeV, p = 3p/25
Particle C: E = 0.08 MeV, p = 2p/25
Particle D: E = 0.08 MeV, p = 2p/25

a) The initial momentum of the system is zero since A is initially at rest. After the decay, the momentum of the system is p to the left for particle B and 2p to the right for particles C and D. Therefore, the momentum of particle B is -p to the right.
b) Using conservation of momentum, we have:
\(p = MBVB + MCVC + MDVD\)
Since \(MB = MA - MC - MD and VC = -VD/2\), we can substitute these expressions and simplify:
\(p = (MA - MC - MD)VB - MCVD/2 - MDVD\)
Rearranging and factoring out VB, we get:
\(VB = (p + MCVD/2 + MDVD)/(MA - MC - MD)\)
Substituting the given values, we get:
\(VB = (p + 25p)/(200 - 50 - 50) = 3p/25\)
Therefore, the momentum of particle B is -3p/25 to the right.
c) The energy and momentum of each particle after the decay can be calculated using the formulas:
\(E = \sqrt((pc)^2 + (mc^2)^2)\)
p = pc
where E is the energy, p is the momentum, m is the mass, and c is the speed of light.
For particle B, we have:
\(E(B) = \sqrt((3p/25c)^2 + (0.511 MeV/c^2)^2) = 0.511 MeV\)
p(B) = 3p/25
For particle C, we have:
\(E(C) = \sqrt((2p/25c)^2 + (0 MeV/c^2)^2) = 0.08 MeV\)
p(C) = 2p/25
For particle D, we have:
\(E(D) = \sqrt((2p/25c)^2 + (0 MeV/c^2)^2) = 0.08 MeV\)
p(D) = 2p/25
Therefore, the energy and momentum of each particle after the decay are:
Particle B: E = 0.511 MeV, p = 3p/25
Particle C: E = 0.08 MeV, p = 2p/25
Particle D: E = 0.08 MeV, p = 2p/25
To learn more about momentum
https://brainly.com/question/18798405
#SPJ4

Answer: 6.40 moles

Explanation:

HOMOGENEOUS

✔️ 1. flat soda pop

✔️ 2. cherry vanilla ice cream

✔️ 3. salad dressing

✔️ 4. sugar

HETEROGENEOUS

5. soil

aluminum foil

black coffee

Homogeneous substances and mixtures are uniform in composition and have the same properties throughout. Heterogeneous substances and mixtures are not uniform in composition and can have different properties in different parts.

Flat soda pop is a homogeneous mixture because it is a uniform mixture of water, carbon dioxide gas, and various flavors and sweeteners.

Cherry vanilla ice cream is a homogeneous mixture because it is a uniform mixture of milk, cream, sugar, cherries, and vanilla flavor.

Salad dressing is a homogeneous mixture because it is a uniform mixture of oil, vinegar, and various flavors and seasonings.

Sugar is a homogeneous substance because it is a pure substance made up of molecules with the same chemical formula.

Soil is a heterogeneous mixture because it is made up of a combination of minerals, organic matter, water, and air, which can vary in composition and properties in different parts of the mixture.

Aluminum foil is a heterogeneous mixture because it is made up of thin sheets of aluminum metal mixed with other substances, such as coatings or additives, which can vary in composition and properties in different parts of the mixture.

Black coffee is a homogeneous mixture because it is a uniform mixture of water, coffee beans, and various flavors and aromas.

The classification of the substances and mixtures as either homogeneous or heterogeneous:

HOMOGENEOUS:

Flat soda pop: ✔️

Salad dressing: ✔️

Sugar: ✔️

Black coffee: ✔️

HETEROGENEOUS:

Cherry vanilla ice cream: ✔️

Soil: ✔️

Aluminum foil: ✔️

Any material or combination that is homogeneous throughout and difficult to discern with the eye is referred to as homogeneous matter. Due to their similar composition, flat soda pop, salad dressing, sugar, and black coffee are categorized as homogenous in this example.

Contrarily, heterogeneous matter describes substances or mixes that are visibly distinct and have an uneven or non-uniform composition. Aluminum foil, cherry vanilla ice cream, and dirt are all examples of heterogeneous materials since they all have distinct visible components or phases.

To know more about Heterogenous:

https://brainly.com/question/33317866

#SPJ6