Sara slides down a playground slide. How will friction affect her as she slides?

Answer:

Iron's atomic number is 26

Explanation:

Answer:

A both

Explanation:

hope this helped

Answer:

False

Explanation:

Clouds are formed when air contains as much water vapor (gas) as it can hold. This is called the saturation point, and it can be reached in two ways. First, moisture accumulates until it reaches the maximum amount the volume of air can hold. The other method reduces the temperature of the moisture filled air, which in turn lowers the amount of moisture it can contain. Saturation, therefore, is reached through evaporation and condensation, respectively. When saturation occurs, moisture becomes visible water droplets in the form of fog and clouds.

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

density of metal = 5.78 g/mL

volume = final volume of water - initial volume of water

volume = 24.7 - 22.3 = 2.4 mL

We have

mass = 5.78 × 2.4 = 13.872

We have the final answer as

Hope this helps you

Answer:

C. Decomposition of water

Explanation:

A decomposition reaction occurs when one reactant breaks down into two or more products.This can be represented by the general equation: AB → A + B. Examples of decomposition reactions include the breakdown of hydrogen peroxide to water and oxygen, and the breakdown of water to hydrogen and oxygen.

The equation for the decomposition of water; 2H2O --> 2H2+O2

Answer:

Decomposition of water!

Explanation:

I just took the test, hope it helps!

Answer:

Its 19.

Explanation:

K (potassium) has 19 electron according to the atomic number in the periodic table. The atomic number tells you the number of protons and electrons.

Answer:

Tectonic plates can crash into each other, and soil and dirt will shoot up, creating mountains and volcanos. This is how the Himalayas are actually said to form, when India crashed into Eurasia.

Hope this helps!

Answer:

Matter can be classified according to

physical and chemical properties. Matter is anything that occupies space and has mass. The three states of matter are solid, liquid, and gas. ... Pure substances can be either chemical compounds or elements.

Answer:

no.

Explanation:

you're prolly wondering why cuz this is revenge for your little game you did to me and whoops! i don't know the answer :) !

Answer:

Density

Explanation:

The ratio of mass to the volume of an object is called its density. Unit of mass is grams and that of volume is mL.

Density = mass/volume

[tex]\text{Density}=\dfrac{\text{grams}}{\text{mL}}\\\\=\text{grams/mL}[/tex]

If you are calculating the grams to mL ratio, it means that we are trying to find the object's density.

Answer:

D. What is the effect of a boat’s shape on its speed?

Explanation:

Kinetic energy can be defined as the energy possessed by an object or body due to its motion. It is the amount of work required to accelerate an object or body with a specific mass from its point of initial rest to a final velocity.

Mathematically, kinetic energy (K.E) is equal to 1/2(mv²).

Hence, the question which would involve the investigation of kinetic energy is "what is the effect of a boat’s shape on its speed?" because speed is directly related to the motion of the boat. Generally, the shape of the hull of a boat has an effect on the speed of the boat.

Answer:

What is the effect of a boat’s shape on its speed?

Answer:A

Explanation:

To do the experiment

The experimental setup is the part of the scientific method that is done to prove the hypothesis. The test variable of the experiment is the height of the tray as it may cause an effect. Thus, option C is correct.

The independent variable has been the test variable that does not depends on other variables and is manipulated by the researcher. It has no fixed value and parameter and is subject to alteration so as to cause an effect on the other variable.

The height of the tray is the independent variable and the mass of the sand is the dependent variable. The height affects the mass of the sand eroded at the bottom. The speed and amount of water have been the controlled variable.

Therefore, option C. the height of the tray with the sand is the independent variable.

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Answer:

Luster

Explanation:

Luster is how the surface of a mineral reflects light. It is not the same thing as color, so it crucial to distinguish luster from color. For example, a mineral described as “shiny yellow” is being described in terms of luster (“shiny”) and color (“yellow”), which are two different physical properties.

Answer:

A Minerals Luster

EXPLANATION:

The Minerals luster is how shiny a mineral is. Luster means a shine or radiance of something, like a polished crystal it gives a sheen of light because it is shiny versus a dirty, worn-out crystal.

Answer:

c.to increase the validity of data

Answer:

i think its D

Explanation:

pls tell me if im wrong

Answer:

evaporation (when water gets warmed up and turns into water vapor) and precipitation(when the ice crystals become so heavy and melt on the way through the troposphere)

Answer:

Volume of the [tex]CO_{2}[/tex] gas at 44°C is 258 ml.

Explanation

here,

using Charles' law ,

[tex]\frac{V}{T} =\frac{v}{t}[/tex]

where , V= initial volume          v= final volume

             T=initial temperature    t = final temperature

Given - pressure is constant ,

so , putting the values -

V= 240ml

T= 22 + 273K = 295K                      (since converting celsius into kelvin that

                                                         is +273K )

v =?

t = 44+ 273K = 317K

Now , putting the given values in charles' law ,

[tex]\frac{240ml}{295K} =\frac{v}{317K}[/tex]

240ml x317K = v x 295K     (through cross multiplication )

v =[tex]\frac{240ml\times317K}{295K}[/tex]

= 258ml .

thus , the volume of carbon dioxide in a container at 44°C IS 258ml .

Answer:

Ansmure two

ismirgonewart

are you

and de band

what is true beauty and the best

Explanation:

itu diatas jawaban nya

Answer:

C.

Explanation:

The main reason for this decrease is an increase in the number of vaccinations of young children. The smallpox vaccine which was created in 1796 completely allows individuals to easily and quickly fight off the smallpox disease if they were to get it. By being able to fight the disease quickly and effectively it provides less time for the disease to affect another individual. Therefore, causing cases to decrease and become very rare as time goes on.

Answer:

An equation derived by the twentieth-century physicist Albert Einstein, in which E represents units of energy, m represents units of mass, and c2 is the speed of light squared, or multiplied by itself.

I think its B cause...

When an atom loses an electron, it becomes a cation (positive ion). When an atom gains an electron, it becomes an anion. Ions are created when an atom loses or gains an electron. Atoms can never lose or gain protons, as this would change the fundamental identity of the atom.

if I'm wrong...please don't attack me

The cations are formed when an atom loses electrons.  

• The positive ions produced by the loss of one or more electrons are known as the cations.  

• The most commonly formed cations take place in the case of the elements, which involve the loss of all the valence electrons.  

• The resulting cation exhibits the electronic configuration of the noble gas atom.  

• The negative ions produced from the gain of one or more electrons are known as the anions.  

Thus, the correct answer is option b, that is, the cations form when an atom loses electrons.

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Answer:

D - He was the first person to use the term Cells.

Explanation:

Hooke invented the first compound light microscope (not first microscope) and he examined a cork and saw that it was made up of thousands of empty pockets which he later called 'Cells'.

Hope it Helps! :D

Answer:

linear

tetrahedral

bent

trigonal-bipyramidal

Explanation:

i just did it one edg

Answer:

For the complete combustion of 10 g of glucose 11.52 g of oxygen is required.

Explanation:

Given data:

Mass of glucose = 10 g

Mass of oxygen required for complete combustion = ?

Solution:

Chemical equation:

C₆H₁₂O₆ + 6O₂    →  6CO₂ + 6H₂O

Now we will convert the given mass of glucose into number of moles.

Number of moles = mass/ molar mass

Number of moles = 10 g/ 180.156 g/mol

Number of moles = 0.06 mol

Now we will compare the moles of glucose with oxygen.

         C₆H₁₂O₆            :              O₂

            1                     :               6

          0.06                :            6×0.06 = 0.36 mol

Mass of oxygen required:

Mass = number of moles × molar mass

Number of moles  = 0.36 mol × 32 g/mol

Number of moles = 11.52 g

For the complete combustion of 10 g of glucose 11.52 g of oxygen is required.

Answer:

I hope this helps

Explanation:

Lewis symbols, which are also known as Lewis dot diagrams or electron dot diagrams, are diagrams that represent the valence electrons of an atom. Lewis structures, also known as Lewis dot structures or electron dot structures, are diagrams that represent the valence electrons of atoms within a molecule.

The bands not straight around since location is not a factor in measuring temperature. Temperature seems to be not the same as the power of a thermodynamic process.

Temperature is a unit used to describe hotness or coldness. It may be stated in terms of any number of arbitrary scales and shows the direction in which heat energy would naturally flow, i.e., from a hotter body to a region of lower temperature (one at a lower temperature).

Temperature seems to be not the same as the power of a thermodynamic process; for instance, an iceberg has a significantly larger total heat energy than a match, despite the fact that a match is burning at a substantially higher temperature.  The bands not straight around since location is not a factor in measuring temperature.

Therefore,  the bands not straight around since location is not a factor in measuring temperature.

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Answer : The correct formula of manganese(II) chloride and manganese(II) oxide is [tex]MnCl_2[/tex] and [tex]MnO[/tex] respectively.

Explanation :

As we know that the chemical formula is formed by the criss-cross method.

In criss-cross method, the oxidation state of the ions gets exchanged and they form the subscripts of the other ions.

For formation of manganese(II) chloride, manganese will form having an oxidation state of +2 called as cation and anion is chloride with oxidation state of -1.Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral  .

For formation of manganese(II) oxide, manganese will form having an oxidation state of +2 called as cation and anion is oxide with oxidation state of -2.Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral  .

Hence, the correct formula of manganese(II) chloride and manganese(II) oxide is [tex]MnCl_2[/tex] and [tex]MnO[/tex] respectively.

The oxidation number of oxygen is -2, and that of chlorine is -1

The top guy is wrong↑

#platofam

Answer:

earthquakes

Explanation: