In which situation is the speed of the car constant while its velocity is changing?
A)
The car travels down a straight track at 30 m
s
m
B)
The car travels around a circular track at 30
S
The car begins from rest and accelerates to 20
S
D)
m
The car begins traveling at 30
m
and slows to 15
S
En

A wetland being drained so a housing development can be built is an example of habitat destruction.

Wetland is a "place in which the land is covered by water—salt, fresh, or somewhere in between—either seasonally or permanently".

Habitat destruction is "the elimination or alteration of the conditions necessary for animals and plants to survive, not only impacts individual species but the health of the global ecosystem".

Housing development a "group of individual dwellings or apartment houses typically of similar design that are usually built and sold or leased by one management".

Hence, drained wetland to a housing development causes habitat destruction.

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1) The VSEPR number for T-shaped molecular geometry is 5.

2) The geometry is octahedral

3) The geometry is Trigonal pyramidal

The VSEPR (Valence Shell Electron Pair Repulsion) theory is used to predict the molecular geometry of a molecule based on the arrangement of electron pairs around the central atom.

For a T-shaped molecular geometry, there are three bonding pairs of electrons and two non-bonding pairs of electrons around the central atom. Therefore, the VSEPR number for T-shaped molecular geometry is 5.

The VSEPR number is the sum of the number of atoms bonded to the central atom and the number of lone pairs of electrons on the central atom.

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The correct answer is option D. Having a large number of people working together ensures that new insights in solving a problem will occur.

Engineers and scientists have knowledge in different fields. Science is a study of nature and the scientists are the people who study science, the study of nature or how the natural world works.

Scientists study and gain knowledge about the nature and the engineers apply it to make use of the knowledge about science.

It can be said they are interdependent. As working closely, the data is exchanged or shared between scientists and engineers. Both scientists and engineers have their own ideas and thoughts.

Scientists can help engineers to develop analytical and research skill which can help engineers to write better code to make best use of science.

Thus, people working together on different aspects, they can have new insights. This helps to look at the situation from different angles and can solve the problems easily and in a better way.

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Answer:

Sand comes from many locations, sources, and environments. Sand forms when rocks break down from weathering and eroding over thousands and even millions of years. Rocks take time to decompose, especially quartz (silica) and feldspar .

Explanation:

49 becase you multilpy it

Explanation:

Specific Heat of the metal will be = 4.184 J/C

Mass of metal = 28 g

Mass of water = 28 g

Rise in temperature = 23.8 - 19 = 4.8 C

Specific heat of water = 4.184 J/C

Let the specific heat of metal =S

The heat released by metal =mass of metal * specific heat of metal * Change in temperature

\(& =28\times S \times 4.8{ }^{\circ} \mathrm{C} \\& =134.4 S^{\circ} \mathrm{C}\)

Heat absorbed by water = mass of water x specific heat of water x change in temp. \(=28 \times 4.184 \times 4.8=562.3296 J\)

Using the principal of Caloriemeter:

We have, Heat released by metal = Heat absorbed by water

134.4S = 562.3296 =>4.184 J/C

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The correct question should be:

if we are heated a metal with 28g mass then we add it in a coffee cup with 28g water. the water temperature raised from 19 degree to 23.8 oc. what was the specific heat of the metal. the water specific heat of water is 4.184 j/g oc.

Answer:

increase.

Explanation:

as you cross the period the atomic size decrease makes the atoms to have more affinity to the coming electrons.

No, Benedict's reagent would not give a positive reaction with all carbohydrates.

Benedict's reagent is commonly used to detect reducing sugars, such as monosaccharides and some disaccharides, which have a free aldehyde or ketone functional group. However, not all carbohydrates are reducing sugars. Non-reducing sugars, such as sucrose and trehalose, lack a free aldehyde or ketone group and would not give a positive reaction with Benedict's reagent.

While Benedict's reagent is a useful tool for detecting reducing sugars, it does not react with all carbohydrates. Only those carbohydrates that have a free aldehyde or ketone group, which are known as reducing sugars, will give a positive reaction. It is important to consider the specific type of carbohydrate being tested and its chemical structure when determining if it will react with Benedict's reagent.

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The answer is false.

Answer:

False

Explanation:

Edgeeee

Answer:

The gravitational potential energy it had from being above the ground is converted to kinetic energy as the rock falls. As kinetic energy increases, the velocity of the rock will also increase. However, if one considers the air, the rock will lose energy as it falls due to air resistance. If the cliff is high enough, the acceleration due to gravity and the air resistance due to the velocity will be exactly equal and there will be no change in kinetic energy.

Explanation:

hope this helps

Answer:

tigers eyes

Explanation:

Explanation:

Picture A which shows an overall negative charge represents an anion. Anion are formed when an atom gains an electron. In doing that, the total number of electrons (negative charge) is greater than the number of protons (positive charge), hence it would have an overall negative charge.

Picture B which shows a neutral charge represents a neutral atom. In an atom, the number of electrons equals the number of protons.

Picture C which shows an overall positive charge represents a cation. Cation are formed when an atom loses an electron. In doing that, the total number of electrons (negative charge) is less than the number of protons (positive charge), hence it would have an overall positive charge.

Answer:

pH= 14.17

pOH= -0.17

[H3O+]= 6.76x10^-15M

[OH-]= 1.5M

Explanation:

1st) It is necessary to write the dissociation equation:

From the equation we can see that from 1 mole of Al(OH)3, 3 moles of OH- are dissociated. So, in this case, from the 0.5M solution, 1.5M of OH- will be produced (3x0.5M=1.5M).

We know that the concentration of OH- is [OH-]= 1.5M.

2nd) With the [OH-] we can calculate the pOH of the solution:

The pOH is -0.17.

3rd) Now we can calculate the pH of the solution:

The pH is 14.17.

4th) Finally, we can calculate the concentration of H+:

So, the concentration of H+ is 6.76x10^-15M.

In Science, went to atom slam together to form a heavier atom this phenomena is called fusion.

Went two atoms slam together to form a heavier item this process is called nuclear fusion in science.

When they are to unstable atoms they combine with each other in order to form a stable atom that is much more heavier.

In the process of recombination energy is released by the items which can be given by the mass energy equivalence,

E = ∆mc²

Where,

∆m is the change in mass during the recombination and c is the speed of light.

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Answer: D

Explanation:

Because at temerature at 25 and 50 is

to low for a compound to evaporate as gas because the bioling point is 100.

Answer: B

Explanation: Evaporation rate is influenced by the liquid's boiling temperature. A lower boilng point means that converting the liquid to a gas takes less energy because higher temperatures mean higher energy content. Assuming that this relationship holds at room temperature and that all other factors are equal, you should expect that Liquid B will evaporate faster.

\(CH_3CH_2OH\) is a polar compound and has hydrogen bonding. It has a higher boiling point. It will have the lowest vapor pressure among the three compounds.

Vapor pressure is the pressure produced by the vapors of a liquid in a sealed container when the liquid is heated. It is a property of a liquid that describes the tendency of a liquid to evaporate. It is measured in units of pressure, typically in mmHg or torr. The higher the vapor pressure, the more volatile a compound is. So, the decreasing order of vapor pressure for the given compounds is: \(CH_3CH_3 > CH_3CH_2F > CH_3CH_2OH\)

Here, \(CH_3CH_3\) is a non-polar compound while \(CH_3CH_2F\) and \(CH_3CH_2OH\) are polar compounds. The polar compound has hydrogen bonding, which increases the intermolecular forces between molecules. As a result, the polar compound will have a lower vapor pressure than the non-polar compound.

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Answer:

-958 spontaneuos

Explanation:

Answer:

-958

spontaneous

Explanation:

Answer:

D: distance and time

Explanation:

The formula for velocity (or speed) is calculated by dividing distance by time.

For example, if the distance is 100 ft in 2 seconds, the speed of a car is 50 ft/sec.

Answer:

Approximately \(0.6003\; \rm mol\) formula units.

Explanation:

Look up the relative atomic mass data for \(\rm K\), \(\rm Cl\), and \(\rm O\) on a modern periodic table:

The relative atomic mass of an element is numerically equal to the mass (in grams) of one mole of its atoms. For example, the relative atomic mass of \(\rm K\) is \(39.908\). Therefore, the mass of one mole of \(\rm K\!\) atoms should be \(39.908\; \rm g\).

Each \(\rm KClO_3\) "formula" unit includes one \(\rm K\) atom, one \(\rm Cl\) atom, and three \(\rm O\) atoms. Therefore, one mole of \(\rm KClO_3\!\) formula units would include:

From the relative atomic mass of these three elements:

Combining these three parts should give the mass of one mole of \(\rm KClO_3\) formula units:

\(\begin{aligned}& M(\mathrm{KClO_3}) \\ &= 39.908 + 35.45 + 3 \times 15.999 \\ &= 122.545\; \rm g \cdot mol^{-1}\end{aligned}\).

The formula mass of \(\rm KClO_3\) is \(M(\mathrm{KClO_3}) = 122.545\; \rm g \cdot mol^{-1}\), meaning that the mass of one mole of \(\rm KClO_3\!\) formula units would be \(122.545\; \rm g\!\).

The mass of this \(\rm KClO_3\!\!\) sample is \(m(\mathrm{KClO_3}) = 73.56\; \rm g\). The number of moles of formula \(\rm KClO_3\!\) units in this sample would be:

\(\begin{aligned}n(\mathrm{KClO_3}) &= \frac{m(\mathrm{KClO_3})}{M(\mathrm{KClO_3})} \\ &= \frac{73.56\; \rm g}{122.545\; \rm g \cdot mol^{-1}} \approx 0.6003\; \rm mol\end{aligned}\).

To know the exact number of mole of potassium (K) in 73.56 g of potassium chlorate (v), KClO₃ do the following:

Determination of the number of mole in 73.56 g of potassium chlorate (v), KClO₃

Mass of KClO₃ = 73.56 g

Molar mass of KClO₃ = 39 + 35.5 + (16×3)

= 39 + 35.5 + 48

= 122.5 g/mol

\(Mole =\frac{mass}{molar mass}\\\\Mol KClO_{3} = \frac{73.56}{122.5}\)

Determination of the number of mole of potassium, K in 0.6 mole (i.e 73.56 g) of KClO₃

Considering the molecular formula of potassium chlorate (v), KClO₃, we can see that:

1 mole of KClO₃ contains 1 mole of K.

Therefore, 0.6 mole of KClO₃ will also contain 0.6 mole of K.

Therefore, we can conclude that 73.56 g of KClO₃ contains 0.6 mole of potassium, K.

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Answer:

sound wave

Explanation:

sorry i can't do a detailed light wave but i had the sound one already done for one of my classes so you're in luck!

The old door is said to be around 5730 years old.

A radioactive isotope called carbon-14 (14C) is frequently used to date historical objects. When an organism passes away, it stops absorbing carbon from the environment, and the 14C content of its remnants starts to degrade at a predetermined pace. We can determine the age of a sample by counting the quantity of 14C that is still present.

The following equation may be used to describe the exponential decline of 14C:

N(t) is the quantity of 14C that is still present at time t, N0 is the starting amount of 14C, is the decay constant, and e is the base of the natural logarithm. N(t) = N0 * e(-t)

It is known that 14C has a decay constant of 1.21 x 10-4 min-1.

We may utilise the fact that the decay rate of 14C is related to the amount of 14C present to estimate the age of the old door. Therefore, we may write: decay rate / initial quantity = where the initial amount of 14C is supposed to be the same as for a recently deceased creature, which has a decay rate of 15.3 decays/(g min) and the decay rate is given as 13 decays/(g min) for the ancient door (g min).

The following equation may be used to calculate the initial quantity of 14C: initial amount = decay rate / = 13 decays/(g min) / 1.21 x 10-4 min-1 = 107438 g

The age of the antique door may now be calculated using the exponential decay equation. Since the decay rate is known, we may use N(t) = N0 / 2, which denotes the period of time needed for half of the original 14C concentration to decay. With the known values substituted, we obtain:

N(t) is equal to N0 * e(-t), followed by N(t) = (107438 g) * e(-1.21 x 10-4 min-1 * t).

N(t) = 0.5 * (107438 g) (107438 g)

After calculating t, we get the following result: t = -ln(0.5) / t = -ln(0.5) / 1.21 x 10-4 min-1 t = 5730 years

Therefore, assuming that the initial concentration of 14C in the ancient door was the same as that of a recently died creature, the age of the door is around 5730 years old.

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Both reactions are the examples of reversible reaction and the reaction moves both forward and backward direction.

In the first equation, hydrogen monoxide molecule is broken down into  water and oxygen molecule. These two molecules again converted into hydrogen monoxide due to reversible reaction and gets equilibrium.

While on the other hand, in the second equation, oxygen molecule turns into ozone molecule and this ozone molecule again converted into oxygen molecule due to reversible reaction and attains equilibrium.

So we can conclude that both reactions are the examples of reversible reaction and the reaction moves both forward and backward direction.

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Answer:

2Mg(s) +O₂(g) → 2MgO(s)

Explanation:

Mg(s) +O₂(g) → MgO(s)

When a chemical equation is balanced, the number of atoms of each element is equal on both sides of the arrow. We usually balance O and H last.

In this case, the number of Mg atoms is equal on both sides. Thus, let's move on to balance the O atoms. On the left side, there are 2 O atoms, while there is only 1 O atom on the left side. Thus, write a '2' in front of MgO.

Mg(s) +O₂(g) → 2MgO(s)

Now, the number of Mg atoms is not equal. Write a '2' in front of Mg to balance it.

2Mg(s) +O₂(g) → 2MgO(s)

The equation is now balanced with 2 Mg atoms and 2 O atoms on each side.

Answer:

c

Explanation:

In science, there is always processing of an item or sample to get an end product. So if the diamond is mined; there is a processing stage used to come out with the final product as Diamond through carbon in the heating process

Forces can cause objects to accelerate , decelerate , stop , start moving , change direction , change shape , or even turn