Which of the following represents a chemical change? (1 point)

Answers

Answer 1
Can I see a photo or can you comment the answer choices.
Answer 2

Answer:

D

Explanation:

Splitting water into hydrogen and oxygen***


Related Questions

A wave has a speed of 23 m/s and a frequency of 13 Hz. What is the wavelength?

Answers

Answer:

1.76923077 meters

Explanation:

wavelength is denoted by the letter lambda it is equal to the speed (v) of a wave in a medium (air , water, light) divided by frequency , equals wavelength . so wavelength = v/f or = 23m/s ÷13hz

it takes 275n to set a stationary 77.3 crate in motion. what is the coefficient of static friction?

Answers

Note: I'm assuming the data 77.3 is the mass of the crate.

Answer:

[tex]\mu_s =0.36[/tex]

Explanation:

The coefficient of static friction, called \mu_s is the ratio between the force needed to start moving an object above a rough surface (Fr), and the normal force the surface exerts on the object (N).

[tex]\displaystyle \mu_s =\frac{Fr}{N}[/tex]

The normal force is numerical equivalent to the weight of the body if no other external forces are acting.

[tex]N=m\cdot g[/tex]

The mass of the crate is m=77.3 Kg, thus its weight and normal force is:

[tex]N=77.3\ kg\cdot 9.8\ m/s^2[/tex]

[tex]N= 757.54\ Nw[/tex]

Now we calculate the coefficient:

[tex]\displaystyle \mu_s =\frac{275\cancel{N}}{757.54\cancel{N}}[/tex]

[tex]\boxed{\mu_s =0.36}[/tex]

Answer:

0.36

Explanation:

please answer! thank you!

Answers

Answer:

Maybe A.... I'm not sure

Explanation:

A. Is the answer I think

A block measuring 20cm by 10cm by 5cm rests on a flat surface. Determine the maximum pressure it exerts on the surface.​

Answers

Sorry I’m in the middle of a test and gotta find a answer sorry again

What did the caterpillar have to do to create the curved graphed with a gradually steeper slope?

Answers

Turn into the anemenous to become a calipiter

If a person is picking up a book with the force of 50 N and the gravity is pushing down with 15 N, what is the net force?

Answers

Answer:

[tex]the \: net \: force = \: 50 - 15 = 35.[/tex]

Answer:

Net force is going to be GREATER FORCE - LESS FORCE if they are working in opposite direction

so,

         50N - 15N = 35N

PLEASE HELP

To celebrate a victory, a pitcher throws her glove straight up into the air with an initial velocity of 6.0 m/s. What is the maximum height of the glove? (Show work)

Answers

Answer:

h = 1.8 m

Explanation:

The initial velocity of the glove, u =- 6 m/s

We need to find the maximum height of the glove. Let it is equal to h. Using equation of kinematics. At the maximum height v = 0

[tex]v^2-u^2=2ah[/tex], h is the maximum height and a = -g

[tex]0^2-(6)^2=2\times (-10)\times h\\\\h=\dfrac{36}{20}\\\\h=1.8\ m[/tex]

Hence, it will go up to a height of 1.8 m.

Spring A has a spring constant of 5 N/m and spring B has a force constant of 9 N/m. A weight of 2 kg is applied to spring A and a weight of 10 kg is applied to spring B. Which of the following is true for the final displacements of springs A and B?
a) Spring B has a larger displacement than spring A. b) Spring A has a larger displacement than spring B. c) Spring A and spring B have the same displacement.

Answers

Answer: Option A.

Spring B has a larger displacement that spring A.

Explanation:

Spring B has a larger displacement that spring A .

By using Hooke's law.

F=-Kx

Where F is force, K is spring constant and x is displacement.

For spring a

Weight / force is 2 kg

Spring constant (K) is 5/nm

Therefore,

F=-Kx

2=-5x

X=2/-5

X= -0.4m

For spring B.

Weight is 10Kg

Spring constant is 9N/m

F=-Kx

10=-9x

X=-10/9

=-1.1m

Therefore Spring B have larger displacement than spring A.

In Hooke's law, negative sign that is present on the spring's force indicate that the force exerted by the spring opposes the spring's displacement.

Please type any energy transformation it will help a lot i would really appreciate it


prize: brainliest

Answers

Answer:

1. Electric generator

2. Using a battery powered torchlight

3. A fire(burning wood)

4. Electric lamp

5. Car using gas

Explanation:

A student weighs 530 N. The walk to the top of a 3m staircase. It takes them 5 seconds. How
much work did they do?
*

Answers

Answer:

W = 1590 J

Explanation:

We could use the formula of potential energy to find work as both have the same units,

                    W = mgh

since weight = mg so,

                     Work = weight x height

                               = 530 x 3

                               = 1590 J

Answer:

The work will be 1590 J

since the formula is W = F x D so I cancel the time

Explanation:

Given:

(Force) F = 530N

(Distance)D = 3m

Unknown:

W or Work

Formula and Solution:

W = F x D

W = (530N) (3m)

Final Answer:

W = 1 590 N·m or simplify as 1590 J

I need this one fast!!!!

Nitrous oxide is the chemical name for "laughing gas." What are the names and the number of atoms in a molecule of
nitrous oxide, N2O?

1.one nitrogen atom and two oxygen atoms

2.two nitrogen atoms and one oxygen atom

3. one nitrogen atom and one oxygen atom

4. two nitrogen atoms and two oxygen atoms

Answers

Answer:

b

Explanation:

there are 2 nitrogen and 1 oxygen, you can tell by the little number after the letter. if there is no number, then it's just one atom

Answer:

B.

Explanation:

I got it right on my test.

action reaction forces are in which one of newtons laws

Answers

Answer:

the third law

Explanation:

could u vote me brainliest plz? thx :)

How many times larger is the mass of a proton compared to the mass of an electron?

Answers

Answer:

1.67262 × 10−27 kg, which is 1,836 times the mass of an electron.

Reviewing old tests and quizzes will not help you determine what will be on a test because teachers don’t like to give students hints about what could be on future tests. Please select the best answer from the choices provided T or F

Answers

Answer:       false

Explanation: on edg

It is false that reviewing old tests and quizzes will not help you determine what will be on a test because teachers don’t like to give students hints about what could be on future tests.

What is reviewing old tests?

A test review verifies whether or not the modifications made to the code, data, or documentation are accurate.

In other words, it is an evaluation of the degree to which the stated goals have been attained that has been done at a set period.

Exam analysis might provide insights that can help you become a more self-sufficient learner.

You can improve your performance the next time you are tested by revising your strategy after reviewing returned examinations to learn why you made mistakes.

Thus, the given statement is false.

For more details regarding test preparations, visit:

https://brainly.com/question/19671752

#SPJ6

what are 3 sources of heat inside earth?

Answers

1. Heat from when Earth was formed.

2. Frictional Heat, which is caused by heavier core material sinking to the center of the Earth.

3. Heat from the decay of elements that are radioactive.

Which of the following is NOT an acceleration?
O Riding your bike faster when you head down a hill
Slowing your bike so you can make it up a hill
O Coming to a stop at an intersection
Riding down the street at a constant velocity

Answers

Answer:

coming to stop at intersecton

Explanation do u not  know what acceleration is?

Which of these warnings refers to a chemical property of the material?

Answers

Answer:

Please show the warning's

Explanation:

The warning refers to the chemical property of the material or object that is flammable.

What is Chemical Property?

A chemical property is a feature that pertains to how a component, such as an ingredient or a compound, can alter as a result of a reaction. Due to bonding and other atomic structural characteristics, a substance develops these qualities as a result of its chemical identity.

Tactile or visual changes may occur in conjunction with chemical qualities. Chemical reactions commonly involve popping, fizzing, or the release of brilliant light. The emission of heat may also be a sign of a chemical reaction or chemical conversion that is taking place. Because the connections in the atomic structure are changing or breaking, these sensory clues appear.

Therefore, the warning refers to a chemical property of the material is flammable or combustible.

To know more about chemical property:

https://brainly.com/question/1935242

#SPJ6

1. Newton's 1st Law: A skydiver opened their parachute and now experiences a force of gravity of -450 N (down) and a force of air resistance of +450N (up).

a) What is the net force (sum) acting on the skydiver?

Answer:

Answers

Net force is zero, so skydiver continues to fall at a constant velocity (called terminal velocity)

Where on the periodic table are the anions of ionic bonds found?

a . Anions are the negatively charged nonmetals on the right side of the periodic table

b. Anions are the negatively charged metals on the right side of the periodic table

c. Anions are the positively charged nonmetals on the left side of the periodic table

d. Anions are the positively charged metals on the left side of the periodic table

Answers

answer:

b.

explanation:

ik its right trust me <3

cause metals on the left and in the center of the periodic table form ionic bonds with nonmetals on the right of the periodic table.

+ 9. What force (in units of Newtons) is needed to give a 3.5 m/s" acceleration to a 1200 kg car?

Answers

Answer:

4200 Newtons

Explanation:

Force = mass x acceleration

1200 x 3.5 = 4200

Question 5
The head of a hammer is often made of steel. This makes the head heavy, which helps create a strong force for driving nails. Steel is also strong. The
head of a hammer must be strong to resist what force?

Answers

Answer:

the nails

Explanation:

The force of the nail pushing in the opposite direction. The correct option is option D among all the given options.

What is force?

A force in physics is an effect that changes the velocity of a mass-moving object, causing it to accelerate from rest, for example. It is a vector quantity since it can be a push or even a pull and always has magnitude and direction.

The head of a hammer is often made of steel. This makes the head heavy, which helps create a strong force for driving nails. Steel is also strong. The head of a hammer must be strong to resist the force of the nail pushing in the opposite direction.

Therefore,  the force of the nail pushing in the opposite direction. The correct option is option D.

To know more about force, here:

https://brainly.com/question/10292695

#SPJ6

Your question is incomplete but most probably your full question was,  

The head of a hammer is often made of steel. This makes the head heavy, which helps create a strong force for driving nails. Steel is also strong. The head of a hammer must be strong to resist what force?

A The force of the air resistance on the moving hammer

B The force of the person using the hammer

C The force of gravity pulling down on the hammer

D The force of the nail pushing in the opposite direction

A cannon is fired horizontally at 243 m/s off of a 62 meter tall, shear vertical cliff. How long will it take the
cannon ball to reach the ground?

Answers

I have your probably older and smarter than me what grade are you in

Select the correct answer.
Which statement is true?
Ο Α. .
The speed of sound in air is inversely proportional to the temperature of the air.
OB.
The speed of sound in air is directly proportional to the temperature of the air.
The speed of sound in air is twice the temperature of the air.
OD
The speed of sound in air is not affected by the temperature of the air.

Answers

Let me think I think it’s B
I'm sure the correct answer is B.

if 270 watts of power is used in 42 seconds, how much work was done

Answers

Answer: W = 11340J

Explanation:

Hey there! I will give the following steps, if you have any questions feel free to ask me in the comments below.

So this is the Formula: Power = Work / Time.

Step 1: Find the Formula

P = W / T

Step 2: Make W the subject of the equation.

W = PT

Step 3: Given.

P = 270 Watts, T = 42 seconds

Step 4: Substitute these values into equation 2 .

W = 270(42)

Step 5: Simplify.

W = 11340J

The amount of work done was 11340.

~I hope I helped you! :)~

Answer:

W = 11340J

Explanation:

When you cook a marshmallow on a metal poker tool over an open flame, energy is transferred. Identify the three different ways thermal energy is transferred in this situation. Be sure to name the specific places or phenomenon in this system where each of the types of thermal energy transfer is occurring and the direction the energy is being transferred (from what to what).

Answers

Answer:

The three ways thermal energy is transferred are;

1) Conduction

2) Convection

3) Radiation

Explanation:

1) The conduction of the heat from the open flame to the marshmallow is through the direct contact of the flame with the marshmallow, such that the flame the region of the combustion reaction, that produces light and heat touches the marshmallow

2) The convection process is the transfer of heat from the rising heated combustion products, as well as the heated air that rises from the flame

3) The radiation heat transfer is the transfer of the heat from the fire to the marshmallows directly by the heat the moves in the form of electromagnetic waves at temperatures above 1000 K, without the need for a medium, such that the marshmallow can be heated by the heat coming from side of the flame.

True or False: Heavy elements such as Carbon and Nitrogen, that are necessary for life were created in the Big
Bang and have been around in the Universe since that time.

Answers

Answer:

i believe the answer is true

Explanation:

everything was created in the big bang

Find by means of a vector (quantity) diagram,
the resultant of two forces of 7N and 3N acting at
right angle to one another
solve ​

Answers

Answer:

which principle prevents a brach from abusing  its power

Explanation:

describing motion with position distance vs time graphs

Answers

Answer:

In a position-time graph, the velocity of the moving object is represented by the slope, or steepness, of the graph line. If the graph line is horizontal, like the line after time = 5 seconds in Graph 2 in the Figure below, then the slope is zero and so is the velocity. The position of the object is not changing.

Explanation:

The support of the State governments in all their rights…I consider one of the essential principles of our Government… How is Jefferson's view reflected in the U.S. Constitution? The U.S. Constitution lists all powers given to the states. The U.S. Constitution gives unlimited power to the states. The U.S. Constitution says powers not given to the federal government belong to the states. The U.S. Constitution gives unlimited power to the federal government and little to the states.

Answers

Answer:

The Correct Answer is

The U.S. Constitution says powers not given to the federal government belong to the states.

Explanation:

In the paragraph, Jefferson states defending the rights of states is one of the fundamental, or most significant, policies of our administration. Did that get you to remember the Tenth Amendment? It restrains the authority of the central government, defending the rights of states. It states that the central government only has the authorities listed in the Constitution. Unlisted authorities belong to the states.

Answer:

D

Explanation:

what is acceleration

Answers

Answer:

Explanation:

Acceleration is the rate of change of velocity. Usually, acceleration means the speed is changing, but not always. When an object moves in a circular path at a constant speed, it is still accelerating, because the direction of its velocity is changing.

[tex]{\tt{\red{\underline{\underline{\huge{Answer:}}}}}}[/tex]

[tex]\longrightarrow[/tex] The rate of change of velocity per unit time is called acceleration.

[tex]\longrightarrow[/tex] Its SI unit is m/s².

[tex]\huge\boxed{\fcolorbox{blue}{red}{Thank you}} [/tex]

Other Questions
How is the current trend of climate change different from previous cycles?A. The temperatures are dropping more quickly.B. The temperatures are changing more slowly.C. The temperatures are much higher.D. The temperatures are not changing as much faud's model racing care drives an average speed of 3 feet per second. Fuad records the distance and times in a table. At this rate, how long will it take the car to travel 21 feet? Dear Ms. Hunter: Subject: Credit Reimbursement Request for Account #45673 Your account will be credited for the erroneous charges. Thank you for bringing this error to our attention. You will receive credit notification by mail in 57 working days. True or False: This is an effective beginning for a direct reply letter. True False Which strategy will make your direct response most useful for the recipient? Build goodwill through emphatic statements. Arrange your information logically. Close pleasantly and quickly. Read the sentence below. Select the prepositional phrase. Then determine whether the phrase is an adjective phrase or an adverb phrase.Under-inflated tires drag on the road and reduce fuel efficiency.Prepositional phrase: Type of phrase: what is drama in drama plays Darius is sleeping right through the sounds of fire engine and police car sirens right outside his window. It is MOST likely that Darius is ________. The governor's canes symbolized __________________a.Spanish control over the Pueblos.b.the ancient history of the Pueblos.c.a feeble people who needed canes.d.the right of the Pueblos to govern themselves. como se reflejan en este texto las ideas de los partidiarios de la restauracin What was the average speed of the truck for this trip? What is the slope of the line? i'll mark brainliest if you can answer this quick and correctly only correct cause i don't accept bad answers or i'll report you if i get a bad grade' Indian Territory's mining companies often retaliated when miners began to strike and to join unions. How did thesecompanies first respond to strikes?A. by offering to help pass new government regulationsB. by closing mining towns and shutting down minesC. by helping miners sign up to join labor unionsD. by hiring strike breakers from other states what is the price of 29.99 after a 33 1/3 markdown? The following trial balance of Crane Co. does not balance.CRANE CO.TRIAL BALANCEJUNE 30, 2017Debit CreditCash $3,099 Accounts Receivable $3,460 Supplies 1,029 Equipment 4,029 Accounts Payable 2,895 Unearned Service Revenue 1,429 Common Stock 6,229 Retained Earnings 3,229 Service Revenue 2,609 Salaries and Wages Expense 3,629 Office Expense 1,169 Totals $14,745 $18,061Each of the listed accounts should have a normal balance per the general ledger. An examination of the ledger and journal reveals the following errors.1. Cash received from a customer on account was debited for $570, and Accounts Receivable was credited for the same amount. The actual collection was for $750.2. The purchase of a computer printer on account for $729 was recorded as a debit to Supplies for $729 and a credit to Accounts Payable for $729.3. Services were performed on account for a client for $890. Accounts Receivable was debited for $890 and Service Revenue was credited for $89.4. A payment of $294 for telephone charges was recorded as a debit to Office Expense for $294 and a debit to Cash for $294.5. When the Unearned Service Revenue account was reviewed, it was found that service revenue amounting to $554 was performed prior to June 30 (related to Unearned Service Revenue).6. A debit posting to Salaries and Wages Expense of $899 was omitted.7. A payment on account for $206 was credited to Cash for $206 and credited to Accounts Payable for $260.8. A dividend of $804 was debited to Salaries and Wages Expense for $804 and credited to Cash for $804.Prepare a correct trial balance.CRANE CO.TRIAL BALANCEJUNE 30, 2017DebitCredit $ $Totals $ $ mackeThe word hydrophone can be found on the same page as the guide wordsOA.hydrophane and hydrophora.B.hydrozoon and Hydrus.OC.hyrdroplane and hydropower.anpachukesentifyD.hydrophobia and hydrophoby.HELP PLS i need help ' please If the ratio of boys to girls in Mr. Matas class is exactly 2 to 3, then the class could have: what are the images of F and H does anyone have a pdf of the greatest by eddie van der meer???? What is the perimeter of the trapezoid? Round to the nearest hundredth.