Undulation in sandy material is called
cross-beds
ripple marks
mud cracks
O fossils

Answers

Answer 1

Answer:

ripple marks

Explanation:

Undulation is defined as the to and fro wavelike motion in a fluid or elastic medium.

Undulation in sandy material is called ripple marks because ripple marks are the sediments of rocks that show wavy structure at its surface due to agitation by water and wind.

Hence, the correct answer is "ripple marks".


Related Questions

Answer in the correct significant figures: 35.6 + 56.27 *

Answers

Answer:

101.87

Explanation:

that's the answer

Examine the given reaction. NH4NO3(s) → NH4+(aq) + NO3–(aq) ΔH° = 25.45 kJ/mol ΔS° = 108.7 J/mol·K Which of the given is correct about the ΔG° at 25 °C?
A)+4,360 J
B)−6,942 J
C)−4,360 J
D)+6,942 J

Answers

Answer:

B)−6,942 J /mol

Explanation:

At constant temperature and pressure, you cand define the change in Gibbs free energy, ΔG, as:

ΔG = ΔH - TΔS

Where ΔH is enthalpy, T absolute temperature and ΔS change in entropy.

Replacing (25°C = 273 + 25 = 298K; 25.45kJ/mol = 25450J/mol):

ΔG = ΔH - TΔS

ΔG = 25450J/mol - 298K×108.7J/molK

ΔG = -6942.6J/mol

Right solution is:

B)−6,942 J /mol

Iron and aluminum are examples of

Answers

Answer:

Iron and aluminum are both examples of metals that are used commonly in everyday life.

What is the molarity of a 50.0ml aqueous solution containing 10.0 grams of hydrogen peroxide H2O2

Answers

Molarity= No of moles of solute * 1000 / vol solution in ml

No of moles= Given mass / Molar mass

Given Mass of solute (H2O2)= 10g

Molar mass of H2O2=34gmol^-1

No of moles= 10/34= 0.294 moles

Volume of solution=50ml

Molarity =   0.294*1000 / 50

Molarity = 5.8M

Oil and water do not mix. What can be said about oil?


It is nonpolar.
It is polar.
It is saturated.
It is unsaturated.

Answers

Answer:

It is non - polar

Explanation:

Oil is a non-polar chemical substance that is a viscous liquid at ambient temperatures and is both hydrophobic (does not mix with water).

Water and oil do not mix. They are said to be immiscible. This is because water is a polar molecule.

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Chemical change example

Answers

Answer: burning paper

Explanation:

The paper burns in air to form smoke and ash. which makes it a chemical change.

Which of the following is not an antioxidant _________
1) Sodium benzoate 2) Sulphur dioxide 3) Sulphite salts 4) Citric acid

Answers

Answer: 1. Sodium Benzoate

Explanation: An anti-oxidant is a substance that can help prevent or stop the damage done by free radicals. Examples include; Sulphur Dioxide, Sulphite Salts, Citric Acid, e.t.c

Sodium benzoate is a pure preservative.

The table describes how some substances were formed.
Substance
P.
Q
Description
Formed by boiling pure water
Formed by combining three hydrogen atoms to every nitrogen atom
Formed by adding 5 g of sugar to 1 L of water
Formed by compressing carbon under high pressure
R
S
Based on the given descriptions, which substance is most likely a mixture?
P
Q
R
S

Answers

Explanation:

Which is a pure substance?

1. soda

2. gasoline

3. salt water

4. carbon dioxide

carbon dioxide

Bromine, a liquid at room temperature, has a boiling point of 58°C and a melting point of -7.2°C. Bromine can be classified as a

1. compound.

2. impure substance.

3. mixture.

4. pure substance.

pure substance.

Answer:

the answer is

Explanation:

Sugar and water make a homogeneous mixture (the same proportions of its components throughout any given sample).

The melting points of ionic compounds _____

Answers

Explanation:

ionic compounds have high melting points

Explain why chlorine is a gas while iodine is a solid yet both are halogens. Select one: a. Both iodine and chlorine differ in strength of metallic bonds b. Chlorine has strong inter molecular forces than iodine c. Iodine molecules are large with strong inter molecular forces than chlorine

Answers

Answer:

Chlorine has strong inter molecular forces than iodine

Explanation:

Answer:

Chlorine has strong inter molecular forces than iodine

Explanation:

I2 is a solid while Cl2 is a gas because Iodine molecules are larger and therefore experience stronger intermolecular forces.

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why is an element considered a pure substance​

Answers

Answer:

Because they cannot be separated into more then one type of substance.

Explanation:

Answer:

Elements are made of only one kind of atom. The particles can be a single atom or a molecule made of only one kind of atom. There is no physical change that can separate elements into more than one kind of substance. This makes an element a pure substance.An element is made up of only one type of atom. An element cannot be broken down into a simpler form.

Which of these is true about electrons? posses a positive electrical charge of one (+1) have a negative electrical charge of one (-1) indicates the number of protons in each atom equals the sum of protons plus neutrons in each atom

Answers

Answer:

have a negative electrical charge of one (-1)

Explanatio

Electrons have an electrical charge of negative one. When you think electron, always think -1

What is the product of the reaction of pentanoic acid with ethanol in the presence of a strong acid?

Answers

Answer:

ethylpentanoate

Explanation:

Alkanoic acids react with alkanols in the presence of mineral acids to yield an ester and water. This is the organic analogue of the inorganic neutralization reaction. The reaction his commonly called esterification. It is an acid catalysed reaction.

The reaction of pentanoic acid and ethanol in the presence of a string acid is shown below;

CH3CH2CH2CH2COOH(aq) + CH3CH2OH(aq) ----> CH3CH2CH2CH2COOCH2CH3(aq) + H2O(l)

The name of the compound formed is ethylpentanoate.

For the set of ionic compounds, CaSO4, CaCO3, Ca(OH)2, choose the correct characterization of their solubilities in water from the response list. Group of answer choices None of the three salts are soluble. All three salts are soluble. Two of the three salts are soluble. One of the three salts is soluble.

Answers

Answer:

None of the three salts are soluble.

Explanation:

According to the solubility rule, the carbonates and sulphates of group two elements are insoluble in water.

All three substances mentioned possess very low solubility in water and can be said to be slightly soluble in water. If we compare them with other ionic substances that dissolve readily in water, we can rightly say that they are insoluble in water.

Hence all three substances are insoluble in water.

how many primary carbon are in 2,3 dimethylpentane​

Answers

Answer:

There are 7 carbons in 2,3 dimethylpentane

Explanation:

Because 2,3-dimethlypentane is an organic compound of carbon and hydrogen with formula C7H16

In the laboratory, a volume of 100 mL of sulfuric acid (H2SO4) is recorded. How many g are there of the liquid if its density is 1.83 g / cm3?

Answers

Answer:

[tex]\large \boxed{\text{183 g}}[/tex]  

Explanation:

[tex]\begin{array}{rcl}\text{Density} & = & \dfrac{\text{Mass}}{\text{Volume}}\\\\\rho & = &\dfrac{m}{V}\\\\1.83 \text{ g$\cdot$ cm}^{-3} & = & \dfrac{m}{\text{100 cm}^{3}}\\\\m & = & \text{183 g}\\\end{array}\\\text{There are $\large \boxed{\textbf{183 g}}$ of sulfuric acid.}[/tex]

what are the efficient things needed for a village ​

Answers

Answer:

Those aspects which are something a village needs are specified beneath.

Explanation:

Things being equally necessary to make living simpler and therefore more enjoyable. The government has promised to continue providing basic facilities to either an unpopulated location, including such roads, drinkable water, as well as electric power. Therefore, throughout the village, certain things accessible with maximum variety and quality that have become the basic requirements for this human existence.

what’s the answer to this?

Answers

the mass weight of the rock is 6.8g

Consider the hypothetical chemical reaction represented by the equation 3 A + 2 B → A 3B 2 Which of the following is a correct interpretation of this equation? i. 3 grams of A react with 2 grams of B to form 1 gram of A 3B 2 ii. 3 atoms of A react with 2 atoms of B to form 1 molecule of A 3B 2 iii. 3 moles of A react with 2 moles of B to form 1 mole of A 3B 2

Answers

Answer:

iii. 3 moles of A react with 2 moles of B to form 1 mole of A 3B 2

Explanation:

A + 2 B → A 3B 2

A chemical equation among other things, gives the stoichiometry of the reaction; that is the relationship between reactants and products.

This relationship is basically stated in moles form the coefficients of the reactants and product.

From the reaction above, we can say;

1 mol of A reacts with 2 mol of B to form 1 mol of A3B2

It cannot be grams because the reactants and products all have different molar masses.

The correct interpretation of the equation of the hypothetical chemical reaction is; Choice (iii) 3 moles of A react with 2 moles of B to form 1 mole of A 3B 2.

Definition:

Chemical equations are equations that make use of chemical formulae and symbols to represent chemical reactions. The left-hand side of a chemical equation represents the reactants and the right-hand side represents the products.

Each reacting entity is also assigned its corresponding stoichiometric coefficient.

However, this stoichiometric coefficient is to quantify the no. of moles of the reactants consumed or products formed as the case may be.

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c. CaCl2 can be melted to produce calcium metal and give off chlorine gas. The equation for this
is CaCl2()→ Ca(s) + Cl2(g). If 277.45 g CaCl2 were melted, how many grams of Ca(s) would
be formed? (10 points)

HELP MEEEEE PLEASE

Answers

Answer:

Total gram of Ca = 99.26 g

Explanation:

Given:

Mass of CaCl₂ = 277.45 g

Find:

Mass of Ca

Computation:

Ca = 40 g/mol

Cl₂ = 2 (35.5) g/mol = 71 g/mol

Total CaCl₂ = 111 g/mol

Total gram of Ca = [40 / 111] 277.45 g

Total gram of Ca = 99.26 g

Os subníveis mais energéticos de um dado átomo são: ...4s2 3d10 4p5 a) indique o seu número atomico b) quantos electrões de valência apresenta esse átomo c) a que família pertence?

Answers

Answer:

A. 35

B. 7

C. halogênios

Explanation:

Aqui, para responder a essa pergunta, precisaremos conhecer o elemento particular em questão.

..... 4s ^ 2 3d ^ 10 4p ^ 5 significa que está a cinco elétrons da configuração eletrônica do último elemento na primeira camada dos metais pesados.

O último elemento da 1ª série do elemento de transição é o zinco, portanto, como está a apenas 5 elementos de distância, o átomo de que estamos falando é o átomo de Bromo de Bromo.

A. O zinco tem um número atômico 30 e como o bromo está a 5 elementos de distância, seu número atômico é 35

B. Uma vez que pertence ao grupo halogênio, tem 7 elétrons de valência como o resto da família

C. Pertence à família dos halogênios

Which scientist developed a new model of planetary motion?

Answers

Answer: Johannes Kepler

Answer:

i believe the answer us kepler

Explanation:

You are pushing a box with 20 N of force that has
a mass of 10 kg, solve for acceleration

Answers

Answer:

Force=mass ×acceleration.

20=10×acceleration.

20=10a.

a=2m/s^2.

Write down the dissolution equation for nickel(II) perchlorate dissolving in water. (Perchlorate is a polyatomic ion with the formula ClO41-.) If four moles of the ionic compound are dissolved, then how many moles of the ANION are present in the solution?

Answers

Answer:

Ni(ClO₄)₂(aq) ⇒ Ni²⁺(aq) + 2 ClO₄⁻(aq)

8 mol ClO₄⁻

Explanation:

Let's consider the dissolution equation for nickel(II) perchlorate dissolving in water.

Ni(ClO₄)₂(aq) ⇒ Ni²⁺(aq) + 2 ClO₄⁻(aq)

The molar ratio of Ni(ClO₄)₂ to ClO₄⁻ is 1:2. If 4 moles of Ni(ClO₄)₂ are dissolved, the moles of ClO₄⁻ formed are:

4 mol Ni(ClO₄)₂ × (2 mol ClO₄⁻/ 1 mol Ni(ClO₄)₂) = 8 mol ClO₄⁻

In the image above the ruler is measuring in centimeters. The blue cylinder falls somewhere between 2.7cm and 2.8cm according to the ruler. Since we can estimate the last digit I would say that the length of the cylinder is 2.76cm. Since I am estimating any number 2.72cm or 2.78cm could also be correct.

Why would 2.755 not be a correct measurement according to estimating the last digit?

Answers

Answer:

The answer is below

Explanation:

Resolution is the smallest unit of measurement that can be measured by a measuring instrument. Each point on the ruler is 0.1 cm and the difference between any two points, about 0.01 cm cam be measured. The minimum measurement (resolution) that can be measured by the ruler is 0.01 cm (two decimals), therefore it cannot measure up to three decimal places such as numbers like 2.755.



How does antifreeze rely on colligative properties to work?

A. It causes the vapor pressure to increase and the increased outward pressure of the gasoline vapors prevents it from solidifying into ice.
B. It causes freezing point elevation which raises the temperature of the gasoline without letting it freeze.
C. It causes freezing point depression which requires the gasoline to reach a much lower temperature before freezing.
D. It causing boiling point elevation, which raises the temperature of the gasoline without letting it boil so that it can resist the cold.

WILL GIVE BRAINLIEST FOR CORRECT!!!

Answers

It causes freezing point depression which requires the gasoline to reach a much lower temperature before freezing. Hence, option C is correct.

What is the freezing point?

Whenever a solute is added to a solution/solvent, it leads to depression in the freezing point of that solution/solvent. Depression in the freezing point of a solution on the addition of a solute is a colligative property.

A colligative property is a physical property which depends upon the number of solutes added not on the nature of solutes which means it does not matter whether we are adding 1000 particles of sugar or salt in water, the depression in the freezing point will occur by the same °C. Also, the more a solute is added the more will be the depression at the freezing point.

The formula for depression at the freezing point is mentioned as under:

             Δ T = K x m

where Δ T = freezing point depression;

                 K = cryoscopic constant;

                 m = molality of the solution.

For example, The freezing point of water is 0 °C but as soon as we add a 92 gm solute like NaCl (common salt) in 1000 gm of water, its freezing point will be lower to −3.72 °C.

Hence, option C is correct.

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The primary function of a scuba regulator is to: Reduce high-pressure gas in the scuba cylinder to a more breathable intermediate pressure. Reduce high-pressure gas in the scuba cylinder to ambient (surrounding) pressure. Provide a diver with a continuous flow of oxygenated air. None of the above.

Answers

Answer:

Reduce high-pressure gas in the scuba cylinder to ambient (surrounding) pressure.

Explanation:

The primary function of a scuba regulator would be to reduce high-pressure gas in the scuba cylinder to ambient pressure.

A scuba regulator is a structure found attached to the scuba cylinder usually carried by scuba divers. The structure regulates the pressure of the breathing gas in the cylinder to a safe level before the gas becomes available for the breathing process of divers.

Usually, the gas in a scuba cylinder is at a high level. Hence, what the regulator does is to bring it down to a level that would be safe for the breathing of the diver.

what is mean by stakeholder​

Answers

Answer:

a stakeholder is a party that has an interest in a company and can either effect or be affected by the business. the primary stakeholder in a typical corporation are its investors , employees, customers and supplies.


3. why are fire tornadoes rare ?


Answers

True fire tornadoes have only been documented now twice. and once in Canberra, Australia during 2003. of this tornado. Then, updraft is simply a rising current of air.

When a substance's particles are packed together tightly and have a definite shape and
volume...it is said to be in what state?
solid
gas
plasma
liquid

Answers

Answer:

solid

Explanation:

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Which best describes how the excerpt appeals to readers' emotions? The excerpt provides facts about the tree, which impresses readers' scientific minds. The excerpt describes how the tree traveled to London, which excites the readers' sense of adventure. The excerpt compares the tree to a person, which makes readers feel sympathetic toward the tree. The excerpt explains how to skin a tree, which makes readers feel awed at the height of the tree what part of a cell determines a persons blood type who is the Prime Minister of India (Algebra) PLZ HELP ASAP! A foot is 12 inches and a mile is 5280 ft, exactly. A centimeter is exactly 0.01m or mm. Sammy is 5 feet and 5.3 inches tall. 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Perhaps you wanted pizza for dinner, but were out voted by the rest of the family who wanted chili. This is similar to what happens in a community. One person has to give up a right for the good of the group. Sometimes citizens' duties and rights conflict with each other. A good example is a public protest. People have the right to meet in groups and share ideas. However, a protest can disrupt traffic or other normal activities. A city must provide extra police protection to keep people safe. Therefore, the city has the right to require permission in advance for a protest. Government must make laws to balance the rights of individuals and different groups of people. Which of the following statements best describes this paragraph? 1. The paragraph describes the purpose of laws in a community but lacks the use of any text connections. 2. The paragraph describes a simple comparison between a family protest and a community protest. 3. The paragraph uses categories of comparison to judge whether individual or group rights are most important. 4. The paragraph uses the analogy of a family is to choosing dinner as a community is to balancing rights and safety. Katherine Johnson reached for the stars long before she helped send humans into space. Born on August 26, 1918 in West Virginia, Johnson had a gift for numbers. As Johnson later described, she spent her life countingcounting the steps she walked, the dishes she washed. Anything that could be counted, I did, she once said. School came easily for Johnson, and she completed eighth grade by the age of 10. After that, she couldnt continue learning locally because her county denied African American students access to secondary education. Johnsons father, Joshua, moved the family 120 miles away so she could attend high school. By 18, she graduated with honors from West Virginia State College, receiving degrees in mathematics and French. She then went on to teach these subjects at a public school. After teaching for many years, one job posting changed the arc of her life. The National Advisory Committee for Aeronautics (NACA) was looking to hire women to fill unique positions. The job title: Computer. Based at Langley Research Center, these human calculators checked the math done by NACAs male engineers and mathematicians. Johnsons sharp intellect and resourcefulness were quickly recognized at Langley; she was promoted after only two weeks. Nonetheless, Johnson faced barriers at the agency. At the time, many workplaces werent integrated, and Johnson and her African American colleagues were segregated within an area of Langley named West Computers. Regardless, she steadfastly asked questions and made her voice heard. In 1958, NACA began to focus more on space travel, and the agency was newly dubbed the National Aeronautics and Space Administration (NASA). Johnsons career flourished at NASA. In 1961, Johnson plotted astronaut Alan Shepards path into space. Then in 1962, Johnson helped astronaut John Glenn to be the first American to orbit the Earth. Even though NASA had started using electronic computers, Johnson was the one to double-check the machines calculations before blast-off. Additionally, Johnson contributed to Apollo 11s milestone 1969 moon landing. She also helped Apollo 13 return safely home after an equipment malfunction. Later in her career, Johnson worked on calculations for NASAs space shuttles and satellites. Even with such stellar contributions, many people in America didnt know Johnsons name until long after her retirement. In 2016, writer Margot Lee Shetterly published Hidden Figures, a chronicle of Johnson and two of her fellow mathematicians work at NASA. Later that year, shetterlys bestselling book was turned into a movie of the same name. Finally, the whole world saw the magnificent trajectory of Katherine Johnsons career. Read the excerpt. Even with such stellar contributions, many people in America didnt know Johnsons name until long after her retirement. In 2016, writer Margot Lee Shetterly published Hidden Figures, a chronicle of Johnson and two of her fellow mathematicians work at NASA. Choose the two synonyms that have the same meaning as the word figures as its used in the title of Shetterlys book. Choose 2 answers: (Choice A) A definitions (Choice B) B answers (Choice C) C numbers (Choice D) D questions (Choice E) E shapes (Choice F) F people The ancient Greek Eratosthenes found that the Sun casts different lengths of shadow at different points on Earth. There were no shadows at midday in Aswan as the Sun was directly overhead. 800 kilometers north, in Alexandria, shadow lengths were found to show the Sun at 7.2 degrees from overhead at midday. Use these measurements to calculate the radius of Earth. Explain why only the lone pairs on the central atom are taken into consideration when predicting molecular shape Geoscientists use ___________ to explore the deep layers of the Earth that humans can not yet dig down into. Geoscientists obtain seismic data from: (Mark All that Apply).the tides human-induced explosions naturally occurring earthquakes the coriolis force How are Earthquakes Measured? Magnitude Scale Richter Scale Fujita Scale Saffir-Simpson Scale The outer brittle shell of the Earth is the ______ that forms the "skin" of the lithosphere. mantle outer core inner core crustWhat is the deepest that humans have been able to dig into Earth? 7.6 miles 16.2 miles 1.7 miles 170.2 miles Streams of charged particles ejected from the sun are called ____________. electromagnetic storms magnetosphere radio waves solar wind A baseball has a mass of 135 grams and a softball has a mass of 270 grams. In which of the following situations would they have the same momentum? The baseball and softball are thrown at the same speed in the same direction. A baseball (m=145g) traveling 35 m/s moves a fielder's glove backward 23 cm when the ball is caught. What was the average force exerted by the ball on the glove?