A sentence for physical weathering

Answers

Answer 1

Answer: Physical weathering can lead to the beginning of the erosion process.

Answer 2

Answer: physical weathering is a process of decay disintgration and decomposition brought about by environmental changes like running water moving ice wind etc

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. Write the following isotope in nuclide notation (e.g., “ ”): copper-70

Answers

Answer:

$^(70)_(29)Cu$

Explanation:

The nuclide isotope notation represents the isotope by its chemical symbol preceded by a superscript (to the left of the chemical symbol) showing the mass number and a subscript (also the the left of the chemical symbol) showing the atomic number (number of protons).

Copper-70:

Chemical symbol: Cu
Mass number: 70
Atomic number: 29 (the atomic number is found in any periodic table)

Nuclide notation:

$^(70)_(29)Cu$

1. In this investigation you will use a Mohr pipette to measure volume. Mohr pipettes use initial and final readings to determine the volume delivered. Explain how to avoid bias in the volume readings.2. You will be preparing a standard solution by mixing two solutions: 0.200 M Fe(NO3)3 and 0.00200 M KSCN. The concentration of the M Fe(NO3)3 solution is 100 times greater than the concentration of KSCN solution. What is the purpose of using a large concentration of Fe(NO3)3 and a small concentration of KSCN to make the standard solution? Explain.

Answers

Answer:

(a) Avoid parallax error

(b) To ensure that almost all the SCN⁻ has reacted.

Explanation:

(a) Avoiding bias

A Mohr pipet is a graduated pipet. To avoid bias, you should always hold the pipet so the meniscus is at eye level.

If your eye is above or below the meniscus, you will get an incorrect reading of the volume.

(b) Excess Fe³⁺

I am guessing that you are adding different volumes of SCN⁻ to Fe³⁺ to generate a Beer's Law plot of the concentration of FeSCN²⁺.

The problem is that the reaction is an equilibrium It does not go to completion.

Fe³⁺ + SCN⁻ ⇌ FeSCN²⁺

You use a large excess of Fe³⁺ to drive the position of equilibrium to the right and make sure that almost all the added SCN⁻ is converted to FeSCN²⁺.

How does a solution of sugar in water is different from a solution of starch in water with respect to:(i) Tyndall effect
(ii) Filterability
(iii) Appearance

Answers

i) sugar solution wil not show tyndall effect , as the particle size is too small to reflect light , nut starch solution will show tyndall effect .

Btw i donno why but i feel like we study in the same school like the u have are so similar ......

Gasoline boils at a relatively low temperature (about 150°C). The kerosene is removed at around 200°C, followed by diesel oil at 300°C and fuel oil at around 370°C.”What topic is the teacher most likely talking about?

Answers

Explanation:

The teacher is most likely talking about the fractional distillation process.

Fractional distillation: It is a separation technique used to separate different components of the given mixture on the basis of their difference in boiling points of the different components. The component with lowest boiling point will get separate out first from the mixture and the vapors formed from boiling are condensed in a separate container.

So, when the fractional distillation of mixture of oils and fuels is carried out gasoline will separate out first due to lower boiling temperature and then kerosene followed by diesel and others (fuels and oils).

Answer:

distillation of a mixture

Explanation:

A car is traveling at a speed of 95 mi/h. If there are 0.62137 miles (mi) in a kilometer,what is the speed of the car in m/s?

Answers

Answer:

42 m/s

Explanation:

To we convert units for speed we can use dimensional analysis. First thing we do is seperate the measurement into a fraction. After this we can multiply by 1km over 0.62137 miles. We do this so that the miles cancel out.

$(95mi)/(h)$ × $(1km)/(0.62137mi)$ = $(95km)/(0.62137h)$

After this we can use a conversion factor and divide by 3.6.

$(95km)/(0.62137h)$ ÷ 3.6 = 42 m/s

Which Idea was once accepted is now considered a scientifically inaccurate A.tge nucleus is the center of the atom
b.an atom is solid material
c.electrons have a negative charge
d.electrons are arranged in layers

Answers

Well, the nucleus is the center, the electrons are negative and arranged in layers, so atoms are not necessarily solid (you know, liquids, gases and plasma is made of atoms too -- plasma from ions, true)

Answer:

The answer is A

Explanation:

Other Questions

Using only the periodic table, write the symbol of the ion most typically formed by each of thefollowing elements:a. Kd. Cib. Cac. S e. Ba f. Br

In your own words describe the difference between the movement of particles in liquids and the movement of particles in gases.

The Minoan civilization existed on the island of Crete, and it was influential in the Mediterranean during the 2000s BCE. In which way can the Phoenicians be described as successors to the Minoans?A. Phoenicia had a powerful, well-trained army. B. Phoenicia was known for its science and culture. C. Phoenicia led an alliance of many city-states. D. Phoenicia was a major sea trading power

What are Valence Electrons?