Which of the following happens during a lunar eclipse?

Select one:
a. Earth casts a shadow on the moon.
b. The moon casts a shadow on Earth.
c. Earth stops revolving in its orbit.
d. Earth starts revolving around the moon.

Answer:

Check below

Explanation:

Answer:

linear

Explanation:

The shape of BCl₂ is linear. The central Be atom has 2 valance electron and so Be has coordination number of 2. In the Be-Cl covalent bond a pair of electron is shared by the Be and the Cl atoms. The bond angle in BeCl₂ is 180°. To account for the bond angle it has been proposed that Be has sp hybridization and each of the two sp hybrid orbital of Be overlaps with the p orbitals of Cl.

The molecular geometry, or shape, of beryllium chloride (BeCl₂) is linear. Therefore, option B is correct.

Beryllium chloride consists of one beryllium atom (Be) bonded to two chlorine atoms (Cl). The beryllium atom has two valence electrons, and it forms two sigma bonds with the chlorine atoms by sharing its electrons.

Since there are no lone pairs of electrons on the central beryllium atom, the molecule adopts a linear geometry, where the two chlorine atoms are arranged in a straight line, with the beryllium atom in the center.

Thus, beryllium chloride has linear geometry.

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Answer:

the answer is d :)

Explanation:

Answer:

Its D

Explanation:

Answer:

Short-term environmental changes can cause changes in genetic makeup, Short-term environmental changes can occur in minutes to hundreds of years, short-term environmental changes immediately affect organisms in the environment

Explanation:

Short-term environmental changes happen fast and with power to kill and change many organisms

Answer: Short-term environmental changes causes changes in genetic makeup.

Short-term environmental changes can occur in minutes to hundreds of years.

Short-term environmental changes immediately affect organisms in the environment.

Explanation:

Short-term environment change can be define as changes in the environment the affect or impact of which last for a short duration but can be drastic and may recover with the passage of time. Duration of these changes last for minute to years.

These changes can be manipulate the genome, morphology or physiology of organisms for example the case of short to prolonged exposure of radiations.

Answer:

The volume would be 800mL and it shows that it is constant.

Explanation:

Given parameters:

Intial volume of gas V₁ = 800mL

Initial temperature T₁ = -23°C to Kelvin; we use K = °C + 273 = -23 + 273 =                                                          250K

Inital pressure P₁ = 300torr

Final temperature T₂ = 227°C to K = 227 + 273 = 500K

Final pressure P₂ = 600torr

Unknown parameter:

Final volume V₂ = ?

To solve this problem, we use the General gas law or the combined gas law where we assume that n=1, this gives:

             [tex]\frac{P_{1} V_{1} }{T_{1} }[/tex] =   [tex]\frac{P_{2} V_{2} }{T_{2} }[/tex]

Since the unknown is V₂, we make it the subject of the formula:

                V₂ = [tex]\frac{P_{1} V_{1} T_{2} }{P_{2} T_{1} }[/tex]

                V₂ = [tex]\frac{300x800x500}{600x250}[/tex]

                V₂ = 800mL

After the temperature and pressure changes the final volume of the gas is calculated to be approximately 800.05 mL.

To find the final volume of a gas when given changes in temperature and pressure, we use the combined gas law:

(P₁ * V₁)/T₁ = (P₂ * V₂)/T₂

Here, the variables represent:

The initial conditions given are:

First, convert the temperatures to Kelvin:

T = -23.0 + 273.15 = 250.15 K

T₂ = 227.0 + 273.15 = 500.15 K

Next, apply the combined gas law to find V₂:

(300.0 torr * 800.0 mL) / 250.15 K = (600.0 torr * V₂) / 500.15 K

Solving for V₂:

[tex]V_2 &= \left( \frac{(300.0 \, \text{torr}) \times (800.0 \, \text{mL})}{250.15 \, \text{K}} \right) \times \frac{500.15 \, \text{K}}{600.0 \, \text{torr}} \\\\V_2 &= \left( \frac{240000 \, \text{torr} \cdot \text{mL}}{250.15 \, \text{K}} \right) \times \frac{500.15 \, \text{K}}{600.0 \, \text{torr}} \\\\V_2 &= \left( \frac{240000}{250.15} \right) \times \frac{500.15}{600.0} \\\\V_2 &= 959.90 \times 0.83358 \\\\V_2 &\approx 800.05 \, \text{mL}[/tex]

Therefore, the final volume of the gas is approximately 800.05 mL.

TLDR: A.

Understanding the idea of chemical equations is sometimes a hard concept to grasp in general chemistry because it’s typically not explained well. What a chemical equation represents is what literally happens on the subatomic level. The coefficients in front of the reactants and products mean, number for number, what you would get if you performed the reaction. It’s like an atomic recipe - you can only “make” things when you have enough ingredients. When an ingredient runs out, you can’t produce any products anymore. The ingredient that runs out the quickest is known as the “limiting reagent”, as it literally limits what you can produce.

In the equation above, 2 equivalents of “a” and 3 equivalents of “b” are consumed to produce the products. This means that “b” gets consumed faster than “a”. To make one sample of products, you need two molecules of “a” and three molecules of “b”. If you start out with four moles of each reactant (the same number of atoms), you’ll run out of “b” before “a” because the reaction consumes more molecules of “b” than molecules of “a”. Therefore, the answer would be A. You would need 6 moles of “b” to finish the reaction and use up the remaining “a” (a 2:3 ratio, just like in the balanced equation).

Hope this helps!

Final answer:

The limiting reactant is determined by dividing the moles of each reactant by its stoichiometric coefficient. Reactant 'B' is limiting because it gives a smaller ratio compared to 'A' after the division, indicating that it will be consumed first.

Explanation:

Identifying the Limiting Reactant

To determine the limiting reactant, you must first understand the stoichiometric relationship between reactants in a balanced chemical equation. In the given equation 2a+3b → c, the stoichiometry indicates that 2 moles of a react with 3 moles of b to produce c. We have 4.0 moles of both a and b. To find the limiting reactant, divide the number of moles of each reactant by its respective coefficient:

For a: 4.0 moles ÷ 2 = 2

For b: 4.0 moles ÷ 3 = 1.33

Reactant b will run out first because it produces a smaller ratio (1.33) compared to reactant a (2) when divided by their coefficients. Therefore, b is the limiting reactant, and the correct answer is 'A) B is limiting because 4.0 mol and 6.0 mol are needed'.

Final answer:

Two tasks that illustrate the importance of precision in measurement are the casual mixing of a cleaning solution, which requires less precision, and a titration procedure in a chemistry lab, where accurate stoichiometry and quantitative chemical analysis are crucial for determining the concentration of the analyte.

Explanation:

When considering differing requirements for measurement in chemical reactions, we can compare two tasks: one where precision is not critical and another where exact stoichiometry and laboratory protocol are essential.

For a task where measurement is not critical, consider mixing a cleaning solution where the exact concentrations are not vital. Small deviations in the amount of detergent or water will not significantly affect the cleaning ability of the solution. This demonstrates a scenario where "good enough" suffices.

On the contrary, precise measurements are indispensable in a task such as a titration in a chemistry lab. In a titration, a known concentration of one solution (titrant) is added to a known volume of another solution (analyte) until the chemical reaction is complete, indicated by a color change or another marker. The volume of titrant used must be measured precisely as it's used to calculate the exact concentration of the analyte. This task necessitates careful quantitative chemical analysis, as any inaccuracy could significantly affect the validity of the results.

Answer:

intron

Explanation:

Answer: Thyroid disorders can range from a small, harmless goiter (enlarged gland) that needs no treatment to life-threatening cancer. The most common thyroid problems involve abnormal production of thyroid hormones. Too much thyroid hormone results in a condition known as hyperthyroidism.

Explanation:

Answer:

Hyperthyroidism and hypothyroidism.

Explanation:

Hyperthyroidism and hypothyroidism are thyroid diseases that affect women the most.

Hyperthyroidism (ICD 10 - E05) is a problem in which the thyroid gland produces excess hormones, which impacts on various body functions. Here the gland is overactive, that is, it works in excess. Hyperthyroidism occurs when the thyroid produces large amounts of these hormones in a short (acute) or long (chronic) period of time.

Hypothyroidism is, in short, a decrease in the production of thyroid hormones - triiodothyronine (T3) and thyroxine (T4). It is the most common disorder of this gland, which is in the neck area and resembles a butterfly. Its performance reverberates throughout the body, interfering in the heartbeat, the rhythm of the intestine, the mood and the menstrual cycle of women. The release of thyroid substances is orchestrated from the pituitary gland, a structure that is there in the brain.

Answer:

What is the question?

Explanation:

Answer:

Gutenberg

Explanation: inventor, printer

To find the number of moles of sodium hydroxide formed from 120 grams, we use the molar mass of NaOH (40 g/mol) and find that it is 3.0 moles.

The student collected 120 grams of sodium hydroxide (NaOH). To calculate the number of moles of NaOH formed, we use the molar mass of NaOH. The molar mass of NaOH is approximately 40 g/mol (23 g/mol for sodium, 16 g/mol for oxygen, and 1 g/mol for hydrogen). Therefore, we can calculate moles using the formula:

Moles = Mass / Molar Mass

By substituting the given values into the formula, we get:

Moles = 120 g / 40 g/mol = 3.0 moles of NaOH

So, the answer to the question is that 3.0 moles of sodium hydroxide were formed in the experiment.

The correct answer is option C. 3.0 moles of NaOH were formed in the experiment.

To find out how many moles of NaOH were formed, we need to use the formula:

[tex]\[ \text{moles of NaOH} = \frac{\text{mass of NaOH}}{\text{molar mass of NaOH}} \][/tex]

The molar mass of NaOH is calculated by adding the molar masses of sodium (Na), oxygen (O), and hydrogen (H). The molar masses are approximately 22.99 g/mol for sodium, 16.00 g/mol for oxygen, and 1.01 g/mol for hydrogen. Therefore, the molar mass of NaOH is:

[tex]\[ \text{moles of NaOH} = \frac{\text{mass of NaOH}}{\text{molar mass of NaOH}} \][/tex]

Now, we can calculate the moles of NaOH produced in the experiment using the given mass of 120 grams:

[tex]\[ \text{moles of NaOH} = \frac{120 \text{ g}}{40.00 \text{ g/mol}} = 3 \text{ moles} \][/tex]

The complete question is:

A student conducted an experiment and combined sodium chloride with magnesium hydroxide to produce sodium hydroxide and magnesium chloride. The student collected 120 grams of NaOH. How many moles of NaOH were formed in the experiment?

Question 1 options:

A) 4800

B) 160

C) 3.0

D) 0.33

Answer:

Molecule and organelles

Explanation:

Answer:

- 0.0413°C ≅ - 0.041°C (nearest thousands).

Explanation:

ΔTf = Kf.m,

Where,

ΔTf is the change in the freezing point.

Kf is the freezing point depression constant (Kf = 1.86 °C/m).

m is the molality of the solution.

Molality is the no. of moles of solute per kg of the solution.

∴ molality (m) = no. of moles of solute/kg of solvent = (0.04685 mol)/(2.11 kg) = 0.0222 m.

∴ ΔTf = Kf.m = (1.86 °C/m)(0.0222 m) = 0.0413°C.

∴ The freezing point of the solution = the freezing point of water - ΔTf = 0.0°C - 0.0413°C = - 0.0413°C ≅ - 0.041°C (nearest thousands).

Answer:

C. A neutron turns into a proton

D. An electron is ejected from the nucleus

Explanation:

In beta decay, a neutron within an atom's nucleus converts into a proton, and an electron is ejected from the nucleus. The correct descriptions of beta decay from the list are C and D.

From the list provided, the items that describe beta decay are:

C. A neutron turns into a proton

D. An electron is ejected from the nucleus

Beta decay is a radioactive process where a nucleus transforms to become more stable. During this process, a neutron converts into a proton plus an electron. This electron, also known as a beta particle, is then ejected from the nucleus at high speed. Although the neutron turns into a proton, the overall mass of the atom remains relatively constant as the mass of an electron is negligible compared to that of a neutron or a proton.

Option B is incorrect because beta decay relates to the ratio of neutrons to protons, not the comparison of neutrons to electrons. Option A is also incorrect because beta decay occurs in unstable atoms, not stable ones.

The chemical compound K₃N is called potassium nitride.

A compound is a substance that is composed of two or more different elements chemically bonded together.

In a compound, the elements lose their individual properties and form new chemical and physical characteristics.

Compounds are represented by chemical formulas, which indicate the types and numbers of atoms present in the compound.

Thus, the compound name of K₃N is potassium nitride. Potassium (K) is a metallic element, and nitrogen (N) is a negatively charged ion. When the three potassium atom combine with the nitrogen atom, it forms the ionic compound of potassium nitride.

Thus, the chemical compound K₃N is called potassium nitride.

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Answer:

I. Changing the pressure:

II. Changing the temperature:

III. Changing the H₂ concentration:

Explanation:

Le Châtelier's principle states that when there is an dynamic equilibrium, and this equilibrium is disturbed by an external factor, the equilibrium will be shifted in the direction that can cancel the effect of the external factor to reattain the equilibrium.

I. Changing the pressure:

For the reaction: CH₄(g) + 2H₂S(g) ⇄ CS₂(g) + 4H₂(g),

The reactants side (left) has 3.0 moles of gases and the products side (right) has 5.0 moles of gases.

II. Changing the temperature  

The reaction is endothermic since the sign of ΔH is positive.

CH₄(g) + 2H₂S(g) + heat ⇄ CS₂(g) + 4H₂(g).

The T is a part of the reactants, increasing the T increases the amount of the reactants. So, the reaction will be shifted to the right to suppress the effect of increasing T and the amount of H₂S(g) will decrease.

The T is a part of the reactants, increasing the T decreases the amount of the reactants. So, the reaction will be shifted to the left to suppress the effect of decreasing T and the amount of H₂S(g) will increase.

III. Changing the H₂ concentration:

H₂ is a part of the products.

H₂ is a part of the products, increasing H₂ increases the amount of the products. So, the reaction will be shifted to the left to suppress the effect of increasing H₂ and the amount of H₂S(g) will increase.

H₂ is a part of the products, decreasing H₂ decreases the amount of the products. So, the reaction will be shifted to the right to suppress the effect of decreasing H₂ and the amount of H₂S(g) will decrease.

Answer:

A

Explanation:

Although rounding is needed, this answer makes the most sense.

If the question is (2.5 x 10^3) + (3.5 x 10^2):

= (2.5 x 1000) + (3.5 x 100)

=(2500) + (350)

= 2850.

Taking out the 10^3 with scientific notation leaves us with 2.85 x 10^3. Because this isn't an answer choice, A is the closest.

To find the sum of 2.5 x 10^3 and 3.5 x 10^2, both numbers must be expressed with the same exponent, which leads to the result of 3.75 x 10^4. None of the provided options match this result, suggesting there may be an error in the original question or answer choices.

To add 2.5 x 10^3 and 3.5 x 10^2, we need to express both numbers with the same exponent. Here's how we do it step-by-step:

Recognize that 10^3 is the same as 1000 and 10^2 is the same as 100.

Convert 3.5 x 10^2 to a number with an exponent of 3: (3.5 x 10^2) x 10 = 35 x 10^2.

Add the two numbers together: (2.5 x 10^3) + (35 x 10^2).

Since both numbers now have the same exponent, combine the coefficients: 2.5 + 35 = 37.5.

Finally, express the sum as a scientific notation: 37.5 x 10^3.

This simplifies to 3.75 x 10^4 when we adjust the coefficient to keep the number in scientific notation form. However, this result is not listed in the provided options. It seems there might be a mistake in the question or the answer choices. Please double-check the question and the options.

Answer:

Conclusion

Explanation:

I believe you were asking for the term that best matches with the description given. Typically the conclusion summarizes your experiment in a 1 to 2 paragraph format.

Final answer:

The conclusion section of a scientific paper is crucial for summarizing experimental findings, interpreting results in the context of the experiment's aims, discussing shortcomings, and recommending further research. It should address the original hypothesis and contemplate improvements for future experiments.

Explanation:

The conclusion section of a scientific paper is vital as it summarizes the importance of the experimental findings. A conclusion should clearly describe the purpose of the experiment, discuss the major findings, offer a brief explanation of these findings, and present recommendations for further study. When drafting the conclusion, it's essential to answer the original question posed by the experiment, using the results obtained. The conclusion should also highlight any shortcomings of the experiment and suggest what could be changed or extended in future research, such as collecting more data for better statistical analysis or modifying the experimental method.

The conclusion is not just a summary but serves to interpret the results in the context of the experiment's aims. If the experiment was designed to test a hypothesis, the conclusion should state whether the findings support it. Furthermore, the conclusion might also raise new questions that emerged from the study, suggest areas for further research, and identify any systematic errors or unexpected insights about the subject matter or the scientific method in general. Reflecting on what could be improved if the experiment were to be redone is also a valuable part of the concluding section.

Mitochondrial DNA is found Inside the cell, but outside the nucleus in relation to the cell. Option B

Mitochondrial DNA (mtDNA) is a small circular DNA molecule that is found in the mitochondria of eukaryotic cells. Mitochondria are organelles that are responsible for generating energy for the cell. mtDNA is inherited from the mother, and it is not affected by the father's DNA.

mtDNA is different from nuclear DNA in several ways. mtDNA is much smaller than nuclear DNA, and it contains fewer genes. mtDNA is also circular, while nuclear DNA is linear. mtDNA is also more prone to mutation than nuclear DNA.

mtDNA is important for a number of reasons. It is essential for the production of energy in the cell. It is also involved in the apoptosis, or programmed cell death. mtDNA can also be used to diagnose a number of diseases, including mitochondrial disorders and certain types of cancer.

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Answer:

28

Explanation:

28 is correct. (NH4)2 is equal to 10 atoms. (8 H and 2 N ) CO3 is equal to 4 atoms. (1 C and 3 O) That's 14 atoms. But it's two molecules of this. So you just multiply by the number of molecules (2), and you get 28.

Answer:

14

Explanation:

Answer:

5.8 L.

Explanation:

where, P is the pressure of the gas in atm.

V is the volume of the gas in L.

n is the no. of moles of the gas in mol.

R is the general gas constant,

T is the temperature of the gas in K.

V₁T₂ = V₂T₁

V₁ = 3.8 L, T₁ = - 45.0°C + 273 = 228.0 K.

V₂ = ??? L, T₂ = 75.0°C + 273 = 348.0 K.

∴ V₂ = V₁T₂/T₁ = (3.8 L)(348.0 K)/(228.0 K) = 5.8 L.

Answer:

Here's what I get.    

Explanation:

What is entropy?

Entropy (S) is often described as a measure of the disorder in a system, but it is really a measure or the number of microstates (W).

A microstate is a specific configuration of the locations of particles and the way that energy is distributed among them.

Entropy is a measure of the degree of the spreading of energy within a system. The more ways that energy can be distributed, the greater the entropy.

Entropy and phase changes

In the solid phase, the particles are in fixed locations and can vibrate slightly about these locations. The number of microstates is relatively small.

If you add energy and convert the solid to a liquid, the particles can slide past each other. The particles have more freedom of motion, so the energy is distributed in more ways. There are more microstates, so S(liquid) > S(solid).

If you add more energy and convert the liquid to a gas, the particles can move in all directions, and the number of microstates (and also S) increases enormously.  

Entropy and number of moles

The more particles you have, the more microstates (ways to distribute the energy) there are.

However, the entropy of gaseous particles far outweighs that of those in solids or liquids.

That's why, when you are asked to predict the sign of ΔS for a reaction, all you need do is calculate the change in the number of moles (Δn) of gases.

If the products contain more moles of gases, ΔS > 0. If the products contain fewer moles of gases, ΔS < 0.

Answer:

B. 0.16 M H₂SO₄.

Explanation:

Rate ∝ [Reactants].

So, the reaction occurs fastest in the highest concentration of H₂SO₄.

So, the answer is: B. 0.16 M H₂SO₄.

Answer:

IO₂

Explanation:

We have been given the mass percentages of the elements that makes up the compound:

Mass percentage given are:

Iodine = 79.86%

Oxygen = 20.14%

To calculate the empirical formula which is the simplest formula of the compound, we follow these steps:

> Express the mass percentages as the mass of the elements of the compound.

> Find the number of moles by dividing through by the atomic masses

> Divide by the smallest and either approximate to nearest whole number or multiply through by a factor.

> The ratio is the empirical formula of the compound.

Solution:

I O

% of elements 79.86 20.14

Mass (in g) 79.86 20.14

Moles(divide by

Atomic mass) 79.86/127 20.14/16

Moles 0.634 1.259

Dividing by

Smallest 0.634/0.634 1.259/0.634

1 2

The empirical formula is IO₂

To find the empirical formula of a compound, we calculate the moles of each element using their atomic masses. Dividing the moles by the smallest value gives us the ratio of the elements, which represents the empirical formula. For the compound containing 79.86% iodine and 20.14% oxygen, the empirical formula is IO2.

To find the empirical formula, we need to determine the simplest whole-number ratio between the elements in the compound. To do this, we first assume we have 100g of the compound, which allows us to convert the percentages to grams. We can then calculate the moles of each element using their atomic masses. The ratio of moles gives us the empirical formula.

For the given compound that contains 79.86% iodine and 20.14% oxygen by mass:

Assuming 100g of the compound, we have 79.86g of iodine and 20.14g of oxygen. The moles of iodine can be calculated using its atomic mass (126.9 g/mol), which gives us 0.628 moles. The moles of oxygen can be calculated using its atomic mass (16.0 g/mol), which gives us 1.259 moles. Dividing both moles by the smaller value (0.628 moles) gives us the ratio of 1:2. Therefore, the empirical formula for the compound is IO2.

Increased wind speed over the ocean. Or more room for other potential uses of the land where wind farms take space.

In an ecosystem, the advantage of offshore wind farms is that it is more likely to get out of sight.

An ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the ecosystem through the process of photosynthesis .Animals play an important role in energy transfer as they feed on each other.As a result of this transfer of matter and energy takes place through the ecosystem .Living organisms also influence the quantity of biomass which is  present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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Answer:

Barometer.

Explanation:

Answer:

70mol

Explanation:

The equation of the reaction is given as:

                  2C₂H₂ + 5O₂ → 4CO₂ + 2H₂O

Given parameters:

Number of moles of acetylene = 35.0mol

Number of moles of oxygen in the tank = 84.0mol

Unknown:

Number of moles of CO₂ produced = 35.0mol

Solution:

From the information given about the reaction, we know that the reactant that limits this combustion process is acetylene. Oxygen is given in excess and we don't know the number of moles of this gas that was used up. We know for sure that all the moles of acetylene provided was used to furnish the burning procedure.

To determine the number of moles of CO₂ produced, we use the stoichiometric relationship between the known acetylene and the CO₂ produced from the balanced chemical equation:

From the equation:

         2 moles of acetylene produced 4 moles of CO₂

          ∴ 35.0 mol of acetylene would produced:  

                               [tex]\frac{35 x 4}{2}[/tex] = 70mol

Answer:

70 mol

the next one is 67.2

Explanation:

:) have a great day

there isn't anything here to answer

Answer:

Boyle's law (PV = k)

-When the size of an air chamber is increased, the air pressure decreases.

-Pressing on an inflated balloon decreases its size.

Charles's law (V/T = k)

-A closed, flexible container expands when its heated.

-A balloon shrinks when it's taken outside in the winter.

Avogadro's law (V/n = k)

-A balloon expands when air is blown into it.

carries instruments aloft to send back information on atmospheric pressure, temperature, humidity and wind speed by means of a small, expendable measuring device called a radiosonde.

Weather balloons carry a radiosonde that provides essential data for weather prediction by sending back information on atmospheric conditions as it ascends to the stratosphere. This data is critical not only for daily weather reports but also for severe weather predictions. Satellites complement these observations by tracking larger atmospheric patterns.

Weather balloons play a crucial role in the systematic collection of weather data. These balloons carry a radiosonde that ascends through the atmosphere and transmits valuable information about atmospheric conditions such as temperature, pressure, humidity, and wind speed. Carried into the stratosphere, these balloons encounter different layers of the atmosphere, providing detailed, vertical profiles that are essential for meteorologists to predict the weather.

Since their conception over 70 years ago, weather balloons have proven to be an indispensable tool for meteorologists. Beyond compiling everyday weather reports, the data collected by these balloons is crucial for predicting severe weather events such as hurricanes or flooding.

The combination of data from weather balloons, satellites, and radar enables comprehensive monitoring of weather patterns. While satellites monitor large sections of the atmosphere and track various environmental elements, weather balloons provide localized, vertical data that is critical for an in-depth understanding of weather phenomena. Together, they form a synergistic network for global weather observation.

Answer:

[tex]\boxed{\text{Electrostatic and magnetic forces}}[/tex]

Explanation:

I can think of two non-contact forces:

Answer:

This question is incomplete.

Explanation:

Force is classified either as contact or non-contact force.

A contact force is a force that requires physical contact/touch with the object. For example, the pushing of a car, the kicking of a ball and the pulling of a door.

Non-contact force is a force that does not require a physical touch/contact with the object. Examples of non-contact force is the force of gravity that pulls object towards itself on earth, force that repels two magnets (of like/similar pole facing each other) and the force that pulls a metallic object in a magnetic field.