A 5 kg block
is pulled across a table by a horizontal force of 4O N with a frictional force ot 8N pOsing the motion. Calculate the acceleration of the oject. 12 An ahia iddt​

Answers

Answer 1

Answer:

By Newton's 2nd law, m*a=sum_of_forces where m is the mass and a the acceleration. Here there are two forces in opposed directions.

Thus 5*a=40-8=32 therefore a=32/5=6.4m^s/2


Related Questions

List 3 properties of solids. Do the same for liquids and gases.

Answers

Answer:

GAS .assumes the shape and volume of its container

particles can move past one another    

.compressible

lots of free space between particles

.flows easily

particles can move past one another

LIQUID assumes the shape of the part of the container which it occupies

particles can move/slide past one another

.not easily compressible

little free space between particles

.flows easily

particles can move/slide past one another

SOLID .retains a fixed volume and shape

rigid - particles locked into place

.not easily compressible

little free space between particles

.does not flow easily

rigid - particles cannot move/slide past one another

A hiker tries to prepare a hard-boiled egg on the high slopes of Mount Everest. The base camp is located 5,300 meters above sea level. The hiker observes that the water begins to boil at 82⁰C, much lower than the 100⁰C needed to cook the raw egg. He hopes that just leaving the egg in the boiling water longer will let the egg cook. Will he have hard-boiled eggs for breakfast?

Answers

Answer:

He will not have hard-boiled eggs for breakfast

Explanation:

The given parameters are;

The elevation at which the base camp of the hiker is located = 5,300 meters

The boiling point of water at the elevation of the base camp = 82°C

The temperature required to cook the raw egg = 100°C

Therefore, we have;

The temperature of the boiling water at the given elevation of the base camp 82°C < The temperature required to cook the raw egg 100°C

Therefore, the eggs will not be hard boiled.

The hiker won't have hard-boiled eggs for breakfast as a result of the

boiling point of water being less than 100⁰C.

The boiling point decreases with an increase in altitude. The hiker was at

5,300 meters above sea level which made the boiling point of water to be

decreased to 82⁰C.

Since the water isn't able to achieve the boiling point of 100⁰C, then the raw

egg won't be hard boiled for breakfast.

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a student collected data about how different fertilizers affect a plant growth. which type of graph should they use to show the data? PLS HELP ASAP :C worth 100 points lol

Answers

Answer:

I think they should use a bar graph

Explanation:

Because if they use a bar graph they could mark each of the different kind of fertilizer and they could easily see which one affected it the most, either good or bad, by the looking at the heights of the bars to determine your conclusion.

Hi there!

:bar graph:

If they use a bar graph they could mark each of the different kind of fertilizer and they could see easier to tell which one affected it the most, by looking at the heights of the bars to determine the answers.

a student is using colored beads to make a model of aluminum sulfate, Al2(SO4)3.
Aluminum atoms are represented by green beads, sulfur atoms by blue beads, and
oxygen atoms by yellow beads. What combination of beads should the student use for
the model?

Answers

The combination of beads should the student use for  the model :2 green, 3 blue and 12 yellow

the modelFurther explanation

In the chemical formula of a compound there are numbers:

1. The number indicates the number of atoms written after the element symbol

2. The number after the parentheses represents the number multiplied by the number of atoms in parentheses.

3. The number before the chemical formula shows the number of molecules behind it, which is usually used in equations

To calculate the beads needed to make a model, we must count the number of atoms of the Al₂(SO₄)₃ molecule

In the Al₂ (SO₄) ₃ molecule there are 3 atoms : Al, S, and O

1. Number of Al atoms: 2 2. The number of atoms S = 3 x 1 = 3 3. The number of atoms O = 4 x 3 = 12

So the combination of beads

2 green(for Al), 3 blue(for S) and 12 yellow(for O)

Answer:

2 blue, 3 yellow, and 12 green

Explanation:

What is true about warm, saturated air?
It contains less water vapor than cold air.

It contains the same amount of water vapor as cold air.

It does not contain any water vapor.

It contains more water vapor than cold air.

Answers

Answer:

It contains more water vapor than cold air

According to the process of conduction which take place from hot to cold end warm saturated air has more water vapor than cold air.

Conduction is defined as a process as a means of which heat is transferred from the hotter end of the body to it's cooler end.Heat flows spontaneously from a body which is hot to a body which is cold.

In the process of conduction,heat flow is within the body and through itself.In solids the conduction of heat is due to the vibrations and collisions of molecules while in liquids and gases it is due to the random motion of the molecules .

As per the concept of conduction, warm hair has more water vapor than cold air, thus the correct option is that warm, saturated air has  more water vapor than cold air.

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Help please if you can answer this first I'll give you the brainliest

Answers

Answer:

1. gas

2. false

Explanation:

What is the role of
electrons within an
atom?
A.
Electrons are in the nucleus and have a
negative charge
B. Electrons are in the nucleus and have a
positive charge
C. Electrons are outside the nucleus and
have a negative charge
D. Electrons are outside the nucleus and
have a positive charge

Answers

The answer would be “C” because electrons are found in the outer layer of an atom, and they are also negatively charged.

Option C - Electrons are outside the nucleus and and have a negative charge is the correct alternative.

We have electrons.

We have to determine their role inside the atom.

What are Electrons ?

An electron is one of the subatomic particles within an atom. It is negatively charged particle whose magnitude is 1.6 x 10⁻¹⁹ C.

According to the question -

The role of electrons inside the atom is as follows -

Electrons revolve around the nucleus.They carry a negative - charge of  -1.6 x 10⁻¹⁹ C.

Hence, Option C is the correct alternative.

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Is 5O2 a Element or Compound?

Answers

5o2 is a Compound not an element

Johnny wanted to paint the ceiling of his room to show the stars of the Milky Way galaxy. What color(s) should he use?

Answers

Answer:

He should use black a light purple brown, tan, blue, and just a tiny bit of pink!

Hope this helps!!

Explanation:

If Johnny wanted to show the brightness of the stars, he should use blue, light blue, yellow, orange, red, and white.

What is Milky way??

The Milky Way is a huge collection of stars, dust and gas .

The Milky Way is seen as a mostly flat, irregularly-shaped feature that stretches from side to side The Milky way is the mixture of the colors as blue , yellow , orange  and white so that it express the appearance of brightness of stars , dust and gas

Hence , Johnny should use blue, light blue, yellow, orange, red, and white.

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Which element would you expect to have the largest radius based on the Periodic Table?
Lead
Selenium
Chlorine

Answers

Answer:

Lead

Explanation:

As you move down the periodic table, the elements get larger and gain additional electron shells, increasing the radius.  In order, they are on the table as Chlorine, Selenium, Lead.

Is the solution a heterogeneous mixture?

Answers

Answer:

nope homogeneous

Explanation:

hope this helps :)

Answer:

SOLUTIONS are homogeneous mixtures. A solution is a mixture of two or more substances in a single phase.

is sandy, silt, or clay loam better? and why?

Answers

clay soils are often rich in plant nutrients. In contrast, sandy soils can drain water too quickly for healthy plant growth and tend to be low in nutrients, but they are easier to work.

Which of the following is the best structure for CH2O2? Explain your reasoning.

Answers

Answer:

I'm guessing structure 1

Answer:

no

Explanation:

no

Convert each measurement into scientific notation. For example, 8.73 Ms is the same as 8.73 x 106 because the “M” stands for 106
107pg

(I'm assuming I have to convert the 107pg but I am unsure of how to answer this)

Answers

Answer:

[tex]107pg = 107 \times {10}^{ - 12}g =1.07 \times {10}^{ - 10} g\\ because \: pico, \: p = {10}^{ - 12} .[/tex]

3. What is a molecule?

Answers

Answer:

a molecule is defined as an element or compound consisting of two or more atoms held together by chemical bonds

i hope this helps :)

Explanation:

How many molecules are in 1.35 mol of CS2

Answers

Answer:

There are  there are 8.13-10^25

Explanation:

N(CS2)= 1.35* (times) 6.02-10^ 25= 3.13-10^25 molecules

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 8.12×10²³ molecules are in 1.35 mole of CS[tex]_2[/tex].

What is mole?

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity of amount of substance. It measure the number of elementary entities of a given substance that are present in a given sample. There are so many formula for calculating mole.

we know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number

number of atoms/molecules=number of moles × 6.022×10²³(Avogadro number)

number of moles of CS[tex]_2[/tex] =  1.35 mol

Substituting all the given values in the above equation, we get

number of atoms/molecules= 1.35 × 6.022×10²³

number of atoms/molecules=8.12×10²³ molecules

Therefore, 8.12×10²³ molecules are in 1.35 mole of CS[tex]_2[/tex].

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3
1 point
1
Select ALL of the true statements
An atom of a given element will still be that element if the number of protons changes
Atoms are mostly made of empty space
An atom of a given element will still be that element if the number of electrons changes
OOGOOO
An atom of a given element will still be that element if the number of neutrons changes
Electrons have a negligible mass compared to the rest of the atom
The atoms mass comes mostly from the neutrons
Previous

Answers

Answer:

Not 100% sure but...

Explanation:

I know that the second, third and fifth one are correct, not sure if there are any more.

which statement describes what happens inside
a liquid thermometer that shows an increase in
temperature?
a. the volume of the liquid decreases because
of an increase in kinetic energy.
b. the movement of the particles decreases
because of a decrease in kinetic energy. .
c. the volume of the liquid increases because
the movement of the particles decreases.
d. the movement of the particles increases
because of an increase in kinetic energy.

Answers

Answer:the volume of the liquid increases

Explanation:

A meteorologist uses a weather map to explain an upcoming change in weather. The map shows a blue line with triangles approaching a red line with semicircles. Based on the map, which weather prediction is most valid? (1 point) A a significant drop in temperature will occur across the area. B There is no chance of precipitation in the forecast. C Warm temperatures will replace cold temperatures. D Humidity levels will rise.

Answers

Answer:

Option C: Warm temperatures will replace cold temperatures.

Explanation:

In a weather map, a warm front is depicted with a red line and red semi circles while a cold front is depicted with a blue line and blue triangles.

Now, we are told that the map shows a blue line with triangles approaching a red line with semi-circles. This means that the cold front is approaching the warm front.

Now a warm front is simply defined as the transition zone where warm air mass gradually replaces a cold air.

Thus, it means the weather map depicts the fact that warm temperature is replacing cold temperature.

Thus; Option C is correct.

Answer: 1: A cold front moved into the area. 2: It would actually be A. A significant drop in temperature will occur across the area. 3: Movement of large air masses. 4: “A Strong Cold Front Threatens the Region”. 5: a meeting of two air masses with major differences in temperature and moisture.

Hope you got 100 because of this!

Put the following scientists in order of their discoveries: 1. Dalton, 2. Bohr, 3. Rutherford, 4. Democritus, 5. Thomson
Please help me I really need the answer

Answers

democritus, dalton, thomson, rutherford, bohr

help :(
If 4.7 moles of oxygen gas are allowed to react with 3.9 moles of iron according to the following equation:
4 Fe + 3 O2 → 2 Fe2O
How many moles of Fe2O3 can be formed?​

Answers

Moles of Fe₂O₃ formed : 1.95

Further explanation

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

[tex]\tt 4Fe+3O_2\rightarrow 2Fe_2O_3[/tex]

We find the limiting reactant from the ratio of the mole and the reaction coefficient

Fe ⇒ 3.9 : 4 = 0.975

O ⇒ 4.7 : 3 = 1.56

Because the ratio of Fe is smaller, then Fe becomes the limiting reactant

Reaction

4Fe + 3O₂ ⇒ 2Fe₂O₃

mol Fe₂O₃ from mol of Fe as limiting reactant

mol ratio Fe₂O₃ : Fe = 2 : 4, then mol Fe₂O₃ :

[tex]\tt =\dfrac{2}{4}\times 3.9=\boxed{\bold{1.95}}[/tex]

1. Based on its location, which element would you predict has chemical properties most
similar to argon (Ar)?
A. Chlorine (CI)
C. Nitrogen (N)
B. Helium (He)
D. Aluminum (Al)

Answers

i think the answer is chlorine because it is closest to argon and in the same period

Answer:chlorine

Explanation:

It’s the answer on the big test

Calculate the maximum mass of potassium sulfate, K2SO4, that could be formed when 4.9 g of sulfuric acid reacts with excess potassium hydroxide.

H2SO4 + 2KOH → K2SO4 + 2H2O

Answers

Answer:

From 4.9 g of sulfuric acid 8.175 g of potassium sulfate is formed.

Explanation:

Given data:

Mass of H₂SO₄ = 4.9 g

Mass of K₂SO₄ formed = ?

Solution:

Chemical reaction:

H₂SO₄ + 2KOH    →    K₂SO₄ + 2H₂O

Number of moles of H₂SO₄:

Number of moles = mass/ molar mass

Number of moles = 4.9 g/ 98.1 g/mol

Number of moles = 0.05 mol

Now we will compare the moles of  H₂SO₄ with  K₂SO₄ .

                       H₂SO₄         :             K₂SO₄

                            1             :                  1

                       0.05           :             0.05

Mass of K₂SO₄:

Mass = number of moles × molar mass

Mass = 0.05 mol × 174.3 g/mol

Mass = 8.715 g

Thus, from 4.9 g of sulfuric acid 8.175 g of potassium sulfate is formed.

how are electrons arranged in elements with atomic numbers 1 through 10?

Answers

Answer:

See explanation

Explanation:

For elements with atomic numbers 1-10, the arrangement of electrons is as follows; 1s 2s 2p.

These elements are found in the second period that commences at lithium and ends in neon.

The ten electrons that may be found in the atoms of these elements are arranged in orbitals as shown above.

the action force always acts in the ____ direction as the reaction force

Answers

Answer:

opposite

Explanation:

Newtons law explains that for every action force there is an equal and opposite reaction.

why hot water is hot on touching?​

Answers

Thermal Energy

When a rise in temperature causes atoms and molecules to move faster and collide with each other. The energy that comes from the temperature of the heated substance is called thermal energy.

What is the process by which new oceanic crust is added?
A Seafloor Spreading
B) Earthquakes
C) Trenches
D) Plate Tectonics

Answers

Answer: A

Explanation:

Answer:

A.Seafloor spreading

Explanation:

The elements least likely to form bonds are found in which group? 15 16 17 18

Answers

Answer:

i think 15 but dont get mad if not (❁´◡`❁)

Explanation:

Answer:

The answer is 18

Explanation:sorry if im wrong TwT

If you were to decrease thermal energy, what would happen to the particles?

Answers

Answer: Explanation:

You can change an object's state of matter by adding or removing thermal energy. When you add thermal energy to an object, these things can happen: Particles move faster (increased kinetic energy). Particles get farther apart (increased potential energy).

in one to 2 sentences explain how a stimulus to one type of receptor might be percieved as a simulus to another type of receptor in people who have synesthesia???
HELP

Answers

Synesthetes — or people who have synesthesia — may see sounds, taste words or feel a sensation on their skin when they smell certain scents.

I don't know if this helps at all, but i hope it does.

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They lost this farm during the Great Depression, and he and his family became migrant farm workers. Chavez had to work even harder after his father was injured in an automobile accident. He knew all too well about the poor pay and terrible working conditions withstood by farm workers. Chavez used nonviolent means to fight for the improved treatment, pay, and working conditions of farm workers. He was instrumental in organizing one such famous strike against the California grape growers in 1965, a battle that lasted for years. At one point, Chavez even called for a national boycott against the grape growers. His efforts over the years resulted in several victories for farm workers. After his death, Chavez was awarded the Presidential Medal of Freedom.Which fact would be most appropriate to include on a yearbook page about Chavez?The United Farm Workers union formed in 1972.He received the Presidential Medal of Freedom.His parents once owned a farm but lost it.His father was injured in an automobile accident. Which of the following is NOT a characteristic developed by New Journalism?illustrations and photographsflashy page layoutssatirical news storiesbanner headlines I need to write a poem about anything please help me is for college Andreasen Corporation manufactures thermostats for office buildings. The following is the cost of each unit:Materials $ 36.00 Labor 14.00 Variable overhead 4.00 Fixed overhead ($1,800,000 per year; 100,000 units per year) 18.00 Total $ 72.00 Simpson Company has approached Andreasen with an offer to buy 7,500 thermostats at a price of $60 each. The regular price is $100. Andreasen has the capacity to produce the 7,500 additional units without affecting its current production of 100,000 units. Simpson requires that each unit use its branding, which requires a more expensive label, resulting in an additional $2 per unit material cost. The labor cost of affixing the label will be the same as for the current models. The Simpson order will also require a one-time rental of packaging equipment for $20,000.Required:a. Prepare a schedule to show the impact of filling the Simpson order on Andreasens profits for the year. (Enter your answers in thousands (i.e., 5,400,000 should be entered as 5,400). Select option "higher" or "lower", keeping Status Quo as the base. Select "none" if there is no effect.) Status quo 100,000 units Alternative 107,500 units Difference Higher or lowerSales Revenue ? ? ? ?Less: variable cost ? ? ? ?Materials ? ? ? ?Labor ? ? ? ?Variable Overhead ? ? ? ?Total variable cost ? ? ? ?Contribution margin ? ? ? ?Less; fixed costs ? ? ? ?Operating profit or loss ? ? ? ?b. Do you agree with the decision to accept the special order. Yes or no?c. Considering only profit, determine the minimum quantity of thermostats in the special order that would make it profitable, assuming capacity is available.... Quanitity of Themostats #___?____ units hello every one you may not believe this but our app is in big trouble the dark web is sending virus to a lot of locations of the internet we might shut this app down forever im sorry .