Speed of 5km. Pls help

Speed Of 5km. Pls Help

Answers

Answer 1

Answer:

It's either A. or B. Im going with B. since the person is walking a constant speed

Explanation:

acceleration is basically when someone or something is increasing in speed


Related Questions

The diagram below shows what happens to an atom of uranium-235 when bombarded by a neutron. Which isotope is represented by X in the diagram?

Answers

Answer:

X represents barium - 141 nucleus.

Written as: (141, 56) Ba

Explanation:

In nuclear fission reaction, due to the fact that the process produces more neutrons, a nuclear chain reaction can possibly occurr. Now, a chain reaction is a one whereby the material that begins the reaction will also be one of the products and it can start another reaction.

Now, for the nuclear chain reaction for the fission of uranium-235, its nucleus absorbs a neutron after which it splits into a krypton - 92 nucleus and a barium - 141 nucleus. Thereafter it releases three more neutrons.

Thus, X is the image represents barium - 141 nucleus.

(141,56) Ba

Which information best supports the idea that the universe began with rapid expansion?
O Measurements of cosmic microwave background radiation
O Measurements of rates of decay
O Calculation of the temperature and brightness of stars
Calculations of the distance from the sun to each planet

Answers

bbbbb x sidisjeiiwkwnsiwowownsxjid i’m so sorry but i need help in this one class i’m trying to get answers to hope you understand
Answer

I believe it’s A.

Explanation

Because the cosmic microwave background (CMB) is thought to be leftover radiation from the Big Bang, or the time when the universe began


The Cosmic Microwave Background radiation, or CMB for short, is a faint glow of light that fills the universe, falling on Earth from every direction with nearly uniform intensity.

GIVING BRAINLY, FOLLOW, 5 STARS AND HEARTS
which of the following is NOT a characteristic of hot water heating systems? ​

Answers

Answer:

The one on the top,'' As the water cool, it is returned to the boiler where it is heated,''

Explanation:

How can electronegativity be used to explain the reaction we see in terms of the numbers and types of bonded being formed in lithium?

Answers

Explanation:

Lithium is an electropositive element that readily loses electrons.

Oxygen is electronegative and it will readily accept electrons.

 Due to this significant electronegativity differences between the two species they form electrovalent or ionic bonds between them.

  2atoms of Li lose two electrons:

      Li  →  Li²⁺ + e⁻

             Lithium isoelectronic with helium

 For oxygen;

      O + 2e⁻   →  O²⁻

                          Oxygen is isoelectronic with Neon

Two ions of the lithium combines with the oxygen to form the bond;

                   4Li + O₂  →  2Li₂O

The electrostatic attraction between the two ions forms the ionic bond

221 A grocery shop has different types of fruit: one box contains 10 mangos, another
contains 7 avocados and the third box contains 5 lemons.
The same shop has 20% organic food. 50% inorganic food, and 30% of the things they sell
are juices.
3 marks)
A) Represent the types of fruit in bar graph.
B) Represent the sales in pie graph.

Answers

Answer:

A) Please see the required bar graph attached

B) Please see the required pie graph attached

Explanation:

The given data are;

The number of each fruit in each box are;

First box contains 10 mangoes

Second box contains 7 avocados

Third box contains 5 lemons

The percentage of the things they sell are;

Organic food = 20%

Inorganic food = 50%

Juices = 30%

A) The bar graph is plotted with Microsoft Excel

The height of each column is equivalent to the number of fruit in the box

Each column represents a box of fruit

B) The pie graph (chart) is generated with Microsoft Excel

The steps to draw the pie chare are;

1) Draw a circle

2) Partition the circle into segments proportional to each percentage from the center of the circle as follows;

The sum of angles at the center of the circle = 360°

The angle of the segment that will represent the 20% organic food in the pie chart = 20/100 × 360° = 72°

Therefore, the segment representing organic food will have an angle of 72° at the center of the circle

Similarly, the segment representing inorganic food will have an angle of  50/100 × 360° = 180° at the center of the circle

The segment representing juices will have an angle of  30/100 × 360° = 108° at the center of the circle.

Why are supergiant so bright?

Answers

Because supergiants are so massive, the core temperature gets much hotter than in giants, so supergiants can fuse elements heavier than hydrogen and helium. But to support their tremendous mass, supergiants burn up their fuel much more quickly.

Answer:

because the core tempature gets much hotter.

Explanation:

so supergiants can fuse elements heavier than hydrogen and helium. But to support their tremendous mass, supergiants burn up their fuel much more quickly.

I will pick the brainiest answer! Thanks! :)

1. What is volume displacement? Why would you use this method?

2. What is density? What happens to things that are denser? What happens if they are less dense?

Answers

Answer:

1. The volume of displaced fluid is equivalent to the volume of an object fully immersed in a fluid or to that fraction of the volume below the surface of an object partially submerged in a liquid. The weight of the displaced portion of the fluid is equivalent to the magnitude of the buoyant force.

Why would you use this method?

So it can be used to accurately measure the volume of the human body and other oddly shaped objects by measuring the volume of fluid displaced when the object is submerged.

2. Density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre.

What happens to things that are denser?

Students should realize that if an object weighs more than an equal volume of water, it is more dense and will sink, and if it weighs less than an equal volume of water, it is less dense and will float.

What happens if they are less dense?

The density of an object determines whether it will float or sink in another substance. An object will float if it is less dense than the liquid it is placed in. An object will sink if it is more dense than the liquid it is placed in.

A solid is composed entirely of xenon atoms. What type of solid is it?
a) ionic
b) metallic
c) covalent network
d) atomic
e) molecular
f) amorphous

Answers

Answer:

ionic

Explanation:

xenom atoms are too large to move in the crystals without first associating with two oxygen ion vacancies and one uranium ion vacancy

Which of the following atoms has the smallest atomic radius?
A. F
B. Li
C. C
D. Be

Answers

The answer would be B.) Li

Answer:

A) F

It has the smallest atomic radius.

Consider the equation:

Ca+O2→CaO

What needs to be done in order to balance the equation?


Place a 2 in front of the Ca and the CaO.

Place a 2 in front of the O2 and the CaO.

Place a 2 in front of the CaO only.

Place a 2 only in front of the Ca.

Answers

the first one would be the best answer

Perform the following
mathematical operation, and
report the answer to the correct
number of significant figures.
7.68 x 4.564 = [?]

Answers

Answer:

35.05152

Explanation:

Answer:

35.1

Explanation:

I put that answer in and it was correct.

Which of the following statements are incorrect?
A. A sodium atom has a smaller radius than a potassium atom.
B. A neon atom has a smaller radius than an oxygen atom.
C. A fluorine atom has a smaller first ionization energy than an oxygen atom.
D. All are statements are incorrect

Answers

b is the answer because oxyen atom has a smaller radius

Answer: B

Explanation:

An ionic compound is

A.a salt

B.held together by a transfer of electrons

C.composed of anions and cations

D.held together by sharing of valence electrons

Answers

The answer is C , composed of anions and cations .

Which is the best description of a molecule?

Answers

Answer:

A molecule is the smallest particle in a chemical element or compound that has the chemical properties of that element or compound. Molecules are made up of atoms that are held together by chemical bonds. These bonds form as a result of the sharing or exchange of electrons among atoms.

Answer:

C

Explanation:

Emma draws a sketch of what happens to light as it moves through air and then into a tank of water. describe what happens to the speed of light as it enter the water.
Answer if you know, if you don't move on please! If you don't know comment not answer. Thank you!!

Answers

Answer:

The speed of light becomes slower in denser medium which is water in this case.

Explanation:

We know the lens law of Refraction which states

[tex]\frac{Sin(i)}{Sin(r)} =[/tex]  Refractive index of second medium /Refractive index of the first     medium

= Velocity of light in medium 1 (V1)/ velocity of light in medium 2 (V2)

When light rays fall from air medium into water which is a denser medium bending of light or change in the direction of light occurs which is knows as Refraction.

When refraction occurs speed of the light rays are also varied as we can see it from the Lenz's Law. suppose two light rays parallel to each other falling on the air-water interface at an angle , the first ray will reach the interface and bend about the normal and then the second ray. We also observe when light enters denser medium the speed of light becomes slower, also the bending of light when going from rarer to denser it bends towards normal of the surface and when it move from denser to rarer medium it moves away from the normal to the surface.

help please I will give brainliest to the best answer

Answers

Answer:

the correct answer is D

the answer is D !!!!!!

To pass a test with 15 questions how many can I get wrong?

Answers

Answer:

You can get 7 answers wrong.

Explanation:

Let's calculate the average

[tex]\frac{15}{2} \\\\=7.5[/tex]

So if you correctly answer 8 -15  (7.5 is approximated to 8 )questions correctly you will pass.

So you can get 7 answers wrong.

How can subsidence lead to the
formation of sedimentary rock?

Answers

Answer:

the process when crusts sink into the seafloor and go further into the mantle. When sediments are compacted and cemented together with the limestone and other rock particles at the ocean floor, a sedimentary rock is formed. ...

Explanation:

define open and closed circuit​

Answers

Answer:

An open circuit is one where the continuity has been broken by an interruption in the path for current to flow. A closed circuit is one that is complete, with good continuity throughout. A device designed to open or close a circuit under controlled conditions is called a switch.

Open circuit allows current to pass through
Closed circuit doesn’t allow current to pass

The first noble gas with a Lewis Structure with 8 dots is

A. Ar
B. Kr
C. He
D. ne

Answers

Answer:

C) He

Explanation:

Helium is one of the noble gases and contains a full valence shell. Unlike the other noble gases in Group 8, Helium only contains two valence electrons.

Isopentyl acetate is the molecule largely responsible for the aroma and taste of bananas. It is made up of carbon, hydrogen, and oxygen. Combustion of a 3.256-g sample of isopentyl acetate produces 7.706 g CO2 and 3.156 g H2O. Using these results, what is the correct empirical formula for isopentyl acetate?

Answers

Answer:

Explanation:

7.706 g of CO₂ will contain 12 x 7.706 / 44 g of C

= 2.1 g of C .

This will be contained in 3.256 g of isopentyl acetate

3.156 g of H₂O will contain 2 x 3.156 / 18 g of H

= .351 g of H

This will be contained in 3.256 g of isopentyl acetate

Rest will be oxygen

amount of oxygen in 3.256 g of isopentyl acetate

= 3.256 - ( 2.1 + .351 )

= .805 g

ratio of C , H , O in isopentyl acetate

= 2.1 g : .351 g : .805 g

2.1 / 12 : .351 / 1 : 0.805 / 16 ratio of moles

= .175 : .351 : .05  ratio of moles

= 3.5 : 7.02: 1

= 7 : 14 : 2

empirical formula of  isopentyl acetate

= C₇ H₁₄ O₂ .

How do slab pull forces affect plate motion? Choose the correct answer.


Uplifted mantle causes plates to move apart.

Convection currents drive the plate downward to move it.

Earthquakes break the crust into smaller plates to make motion easier.

The weight of the subducted plate produces a force to continue moving the plate.

Answers

Answer:

The weight of the subducted plate produces a force to continue moving the plate.

Explanation:

How many number of oxygen molecules are required to produce 0.22 g of CO2 according to the reaction?
c+o2=co2​

Answers

The number of moles for co2=mass(g)/molar mass
n=.22/44=.005 mole of CO2
from the equation we see the relationship between the moles of co2 and O2 and we find that they have the same number of moles
So we need .005mole of O2
Multiple the number of moles with avogadro’s number to know the number of O2molecules
.005x6.022 x10^23

What is the formula for mass number?

Answers

Answer:

the formula for mass number is "mass number = protons + neutrons".

How much eat is absorbed when 50.0g of water changes from 25.0 Celsius to 37.0 Celsius?

Answers

27 I think beacuse if you subtract
4.186 j/g. X 50g x (37-25) =
2,511 joules or 2.5 kilo joules
Or 2.38 btu


4.186 is specific heat of water per gram per deg C at sea level
Times mass of 50 grams
Times delta T of the water


2530 joules when cross checked by plugging into an online calculator

The element magnesium is a
O Group 12, Transition Metal
O Period 3, Alkaline Earth Metal
Period 4. Alkali Metal
O Period 4, Halogen

Answers

Group 2
Period 3
Alkaline Earth Metal

What is a rule for determining the mass number of an atom or ion?

Answers

Answer:

The mass number of the atom is equal to the sum of the number of protons and neutrons in the nucleus

Explanation:

Each proton and each neutron weigh one amu( atomic mass unit), adding together the neutrons and protons and multiplying by 1 amu you get the mass of an atom

The compound whose molecules have the highest average kinetic energy is?

Answers

Answer:

C)

Explanation:

The warmer the molecules, the higher the average kinetic energy.

"As stated in the kinetic-molecular theory, the temperature of a substance is related to the average kinetic energy of the particles of that substance. When a substance is heated, some of the absorbed energy is stored within the particles, while some of the energy increases the motion of the particles. This is registered as an increase in the temperature of the substance." -lumen learning

(I know for sure but what think... hope this helped)  

7th grade help me plzzzzzzzz

Answers

Answer:

1. Metals

2. Solid, gas, liquid

Explanation:

For #1:

The majority of elements in the periodic table are classified as metals. The transition metals lie in the center of the table, spanning groups three through 12. These elements are solid at room temperature, except mercury, and have the metallic color and malleability expected of metals.

Hope this helps :)

Lithium has two isotopes, lithium-6 weighing 6.015 amu (7.5% abundance), and lithium-7
weighing 7.016 amu (92.5% abundance). What is the atomic mass of lithium?
with calculations

Answers

Answer:

The answer is 6.941 but I dont really have the explanation

Explanation:

The atomic mass of lithium will be 6.9458 amu.

What is Atomic Mass ?

The mass of an atom of a chemical element expressed in atomic mass units.

It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.

Calculation :

Consider 10000 atoms of Li ;

742 of them would have mass 6.02.9258 of them would have mass 7.02

.

Hence,

The total mass of these 10000 Li atoms would be ;

(742 × 6.02) + (9258 × 7.02) = 69458

∴ 1 Li atom on average would have mass =  69458 / 10000 = 6.9458 amu

Therefore, The atomic mass of lithium will be 6.9458 amu.

Learn more about Atomic Mass here ;

https://brainly.com/question/17067547

#SPJ2

Other Questions
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Small businesses use spreadsheets for a variety of reasons.OBJECTIVESCreate a spreadsheet to track payroll.DirectionsCreate a spreadsheet to calculate the your company's payroll, or how much you pay each employee and the total you pay all employees.You pay your employees every two weeks, and for the last two weeks, your employees worked the following hours:Employee 1: 78Employee 2: 75Employee 3: 80Employee 4: 45Employee 5: 50Employee 6: 80Employee 7: 65Employee 8: 60Employee 9: 78Employee 10: 75Your spreadsheet should calculate:the total hours worked for each employeethe gross pay for each employee (pay rate is $12.50 per hour)the state income tax for each employee (use 5.7%)the Federal income tax for each employee (use 15%)Social Security for each employee (use 3.5%)the net pay for each employee by subtracting the income tax and Social Security from the gross paythe total gross pay, total state income tax, total Federal income tax, total Social Security, and total net pay paid to all employeesWhen you finish your spreadsheet, estimate your answers to check for accuracy. Make any necessary corrections. Use formatting techniques to make your spreadsheet easy to read. Upload your spreadsheet using the Upload tool in the box below. HELP NOW!!!!!!!!! PLEASE PTS Which of the following answer choices describes two MAIN ideas of the article? 1. Mindfulness is paying attention to our thoughts and feelings and being curious about whether they are compassionate or critial. 2. Being hard on yourself may not get the results you want. 3. 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Compute the June 30, 2020, inventory at the June 30 price level under the dollar-value LIFO retail method. Which sentence is the clearest example of inductive reasoning? A. Roasted peanuts are salty. Chips are salty. Therefore, chips areroasted peanuts.B. Zachary has hated every party he's been to. Therefore, he will hatethis partyC. Doctors have degrees. Margareta is a doctor. Therefore, Margaretahas a degreeD. The game crashes every 15 minutes. Therefore, the game willnever crash again. It also detects if you are right or wrong What were the beliefs of the Lost Cause? What were some of the major achievements of the Harlem rattlers? why was the royal society of london formed A man has a mass of 66 kg on Earth. What is his weight in Newtons? What were the early factory people called because they had enough money to build factories Help and please do not report I got an practice thing from my tutor, so it's not a quiz.