For an electric toothbrush, is input energy equal to useful output energy? Explain
your answer.

Answers

Answer 1

No, input energy is not equal to useful output energy, if it is an electric toothbrush.

What is the useful type of energy produced in an electric toothbrush?

Electrical Energy is the useful type of energy produced in an electric toothbrush.

If input energy is equal to useful output energy. This means that the total amount of energy that is in an isolated system (such as an engine or a generator) remains constant (conserved) over time.

However, the total amount of useful energy output of an isolated system is never equal to the total energy input.

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Related Questions

Elements are usually dull, brittle and do not conduct electricity are know as_____.

Points: 46

Answers

Answer:

nonmetals. it's one of them

Which of these substances is commonly refined by electrolysis?
brine
rust
titanium
water

Answers

I believe the answer would be titanium. Good luck on your assignment and have a happy christmas :)

How do covalent compounds differ from ionic compounds?

Answers

Answer:

1. Ionic bonds result from transfer of electrons, but covalent bonds are formed by sharing.

2. Ions are arranged in a three-dimensional array (like crystals). Covalently bonded substances exist as discrete molecular units.

3. Ionic compounds often dissociate into ions in solution, but covalently bonded molecules retain their molecular identity in solution.

Hope this helps :)

giving brainly if correct!
complete the chart above​

Answers

The water the sugar and the anti-acid are being manipulated. The water is responding and the controlled variables are the amount of each thing and the temperature.

Answer:

I hate chemistry good luck alice

Based on the graph, what is the approximate half-life of the reaction shown below

Answers

Answer: 2.1 minutes

Explanation: Based on the graph, what is the approximate half-life of the reaction shown below

Atoms with the same number of protons but with different electrical charges are called:

Answers

Answer:

It is called ions

Explanation:

Analyze the reaction of solid magnesium and water. Which pair of reactants and products in the table below represent the correct balanced equation for the reaction?

Answers

Answer:

3 is correct answer I think

Explanation:

Labor unions arose in the nineteenth century as increasing numbers of Americans took jobs in factories, mines, and mills in the growing industrial economy.

The Knights of Labor, founded in 1869, was the first major labor organization in the United States. The Knights organized unskilled and skilled workers, campaigned for an eight hour workday, and aspired to form a cooperative society in which laborers owned the industries in which they worked.

The Knights’ membership collapsed following the 1886 Haymarket Square riot in Chicago. By 1886 the American Federation of Labor (AFL), an alliance of skilled workers’ trade unions, was growing.

What color does red cabbage juice change in ammonia?

Answers

Answer:

Green

Explanation:

Ammonia turns the cabbage juice into a blue/green color because it is a base, a material that tastes bitter and makes an acid neutral.

Answer:

green

Explanation:

I did the experiment

Question 24 of 25
How can one tell if a reaction is a redox reaction?
O A. Elements change phases.
O B. A precipitate is formed.
O C. Spectator ions are present.
O D. Electrons are gained and lost.

Answers

Answer:

D. Electrons are gained and lost

Explanation:

When electrons are gain and lost, redox reaction takes place. In redox reaction, reduction and oxidation tales place simultaneously. Therefore, option D is correct.

What is redox reaction ?

Redox reactions include a change in the oxidation state of the substrate. When electrons are lost or the oxidation state increases, it is called oxidation; when they are gained or the oxidation state decreases, it is called reduction.

Redox reactions are those in which there is a change in the oxidation number, with both an increase and a drop in number. The reaction called non-redox if this does not take place.

Oxidation and reduction always occur jointly because any loss of electrons by one substance must be followed by a gain of electrons by another. Therefore, oxidation-reduction processes or simply redox reactions are other names for electron-transfer events.

Thus, option D is correct.

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Which chemical equation below shows a combination (or synthesis reaction?

A) 2KClO3 —> 2KCI+3O2
B) C+ O2 —> CO2
C) 2H2O —> 2H2 + O2
D) NaCl —> Na + Cl

Answers

Answer is C

A synthesis reaction looks like this:

A+ B → AB

3. Classify the following plants along with two main characteristics: al Cycus b) Bamboo c) Lemna d) Paddy a) Sugarcane f) Pinus g) Mango b) Mustard​

Answers

Answer:

A. cycas

1. it is thick and scaly

2. it grow relatively slowly and have a large, terminal rosette of leaves.

B. bamboo

1. it is very durable

2. it is both flexible and elastic

C. lemna

1. it grows as simple free-floating thalli on or just beneath the water surface

2. it are small, not exceeding 5 mm in length

D. paddy

1. it is variety purity

2. it degree of purity

E. sugarcane

1. it is bear long sword-shaped leaves

2. it's stalks are composed of many segments, and in each joint there is a bud

application of electroplating​

Answers

Answer:

are you interested in tun

Identify the following element: a metal, 2 valence electrons, +2 oxidation number, valence electrons are in period 4.

Answers

Answer:

Calcium

Explanation:

I just checked the periodic table! This is right checked twice, I hope this helped first time answering a question. Good luck!

In order for a chemical reaction to take place, a certain amount of _____ must be present.

Answers

Answer:

The answer is energy. Please give me Brainliest!

Explanation:

Raising the concentrations of reactants makes the reaction happen at a faster rate. For a chemical reaction to occur, there must be a certain number of molecules with energies equal to or greater than the activation energy.

Volcanoes will most likely form along a convergent plate boundary that is....

A. Continental vs Continental
B. Continental vs Oceanic
C. None of the above.

Answers

Answer:

I think its b part or none of above

PC13 ionic or covalent

Answers

Answer:

The bond between Phosphorus and Chlorine in PCl3 is covalent as chlorine needs one electron and phosphorus has metallic character and easily donate electron

What foods have been allowed or banned in which countries? Why?
please please help me

Answers

kinder eggs were banned in the US for a while because of a 1938 federal law that banned toys to be enclosed within food products.
Marmite was banned in Denmark in 2004 because of a law that resourced food products that were fortified with vitamins. Marmite had yeast extract. Technically, Denmark hasn’t banned Marmite, it’s more the additional vitamins minerals and such.
Haggis was banned in the US dba sue it contained sheep lung, which violates federal safety regulations.
McCain Brand French Fries have been banned in several countries, such as the UK and Australia, because it has a asthma including chemical called azodicarbonamide

Nylon is a synthetic material that has many uses. It is used in the production of machine parts, cookware, and fabric. Nylon is made from petroleum and natural gas. Suppose that there were a shortage of petroleum and natural gas. What would companies that produce nylon likely need to do? A. identify a different natural resource that nylon could be made from B. search for nylon in many different parts of the earth C. convert existing nylon back into petroleum and natural gas D. find a way to make nylon without using natural resources

Answers

In case of a shortage in petroleum and natural gas, a company should find a way to make nylon without using natural resources.

Nylon is a very important material used in numerous applications. As a result of this, the demand for nylon as a raw material has genuinely been on the high side ever since.

However, nylon production depends on petroleum and natural gas. It is possible that there could be a shortage of these resources since they are obtained from the environment. In such cases, a company should  find a way to make nylon without using natural resources.

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Answer:

identify a different natural resource that nylon could be made from

Explanation:

I just did this question

What’s the correct answer to this problem?

Answers

The number of protons and electron

4. Initially, 1 mol of oxygen (assumed to be an ideal gas) has temperature 310 K and volume 12 L. We will allow it to expand to volume 19 L. (a) What would be the final temperature if the gas expands adiabatically

Answers

Answer:

490.83 oK

Explanation:

First of all, we better agree on the meaning of the word adiabatically. It means without the loss or gain of heat. So nothing is given up to or taken from the environment.

This also assumes that no change has occurred in the pressure.

T1 = 310 oK

T2 = ?

V1 = 12 L

V2 = 19 L

T1/V1 = T2/V2

310 / 12 = x/19            Multiply both sides by 19

310*19 / 12 = T2         Multiply 310 * 19 on the left.

5890 / 12   = T2         Divide by 12

490.83 = T2

which statement describes how vapor pressure occurs? (1 point)

a) Some molecules of a substance have high enough kinetic energy to vaporize. These molecules exert
pressure on the substance.

b) Some molecules of a substance have low enough kinetic energy to melt. These molecules exert pressure on the substance

c) Some molecules of a substance have low enough kinetic energy to vaporize. These molecules exert
pressure on the substance.

d) Some molecules of a substance have high enough kinetic energy to melt. These molecules exert pressure on the substance

Answers

Some molecules in a substance have a high kinetic energy hence they are able to convert into vapor. These molecules exert pressure on the liquid surface.

We know that the molecules that compose matter are in constant random motion. The kinetic energy of all the molecules in the liquid are not the same. The molecules at the surface of the liquid posses more kinetic energy than the molecules below.

Some molecules of a substance have high enough kinetic energy to vaporize. These molecules exert  pressure on the substance.

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Answer:

Some molecules of a substance have high enough kinetic energy to vaporize. These molecules exert pressure on the substance.

Explanation:

Which is the correct definition of electronegativity?

Answers

Answer:

Electronegativity is defined as the tendency of an atom participating in a covalent bond to attract the bonding electrons

Explanation:

Electronegativity increases and you go up and to the right, making fluorine the most electronegative element.

If a number has the units g/L then its
A) a number we are not going to use at all.
B) an imaginary unit that we are not going to use.
C) creating a relationship between mass and volume
D) a relationship between volume and distance.

Answers

Answer:

C) creating a relationship between mass and volume

g/L

g or gram is mass

L or Litres is for volume

A force of 5N accelerates an object. The object mass is 50 g. What is the acceleration of an object?

Answers

Answer:

100 m/ s²

Explanation:

Newton's Second Law of Motion:

[tex] \boxed{ \mathsf{force = mass \times acceleration}}[/tex]

___________________

In the question:

Force applied = 5 N mass of the object experiencing force = 50 g

Note that the quantities here must be in their SI units.

SI unit of Force is Newton(N).

SI unit of mass is kilogram(kg)

Force is already in it's SI unit, while mass isn't.

Converting mass from grams to kilograms:

1000 g = 1 kg

=> 1 g = 1/ 1000 kg

=> 50 g = 50/ 1000 kg

= 1/ 20 kg

___________________

Calculating acceleration:

[tex] \mathsf{5 = \frac{1}{20} \times acceleration }[/tex]

multiplying both sides by 20:

[tex] \implies \mathsf{5 \times 20= (\frac{1}{20} \times 20)\times acceleration }[/tex]

20 on the RHS gets canceled, for it's present on the numerator as well as the denominator.

[tex] \implies \mathsf{100= acceleration }[/tex]

So, here, we got acceleration = 100 m/s².

Since, the other quantities used in the formula are in their SI units, acceleration must be in it's SI unit as well.

The SI unit of acceleration is m/s²

___________________

Answer:

[tex] \boxed{ \mathsf{100 \:m/s^2= acceleration }}[/tex]

oxygen is odorless and colorless physical or chemical

Answers

Answer:

(Physical or Chemical) properties of a substance can easily be observed. … (Physical or Chemical) properties can be used to identify substances. physical property. Oxygen is odorless and colorless.

Explanation:

50 POINTS!!!! PLEASE HELP I AM BEGGING!!!!!!
3CH4 and C3H12 have the same number and kind of elements. How are they different?

Answers

3CH4 refers to three molecules of a
compound and C3H12 refers to only one
molecule of a compound.
3CH4 and C3H12 are actually different
molecules though they contain the same
number and types of atoms. Recall that both
of them are hydrocarbons hence they
contain only hydrogen and carbon.
3CH4 refers to three molecules of methane
while C3H12 refers to one molecule of
diphenyl methane. Hence 3CH4 refers to
three molecules of a compound and C3H12
refers to only one molecule of a compound.

Which one is the answer?

Answers

Answer:

I think 1, 4, and 5 are the answers to this question. I am not sure about 4 though.

Explanation:

You have to have a power source (1), you also have to have a way to get that power somewhere else (5), and the reason for 4 would be that the power has to come back through the power source to remain working.

The characteristics “fingerprints” of light produced when a substance is given energy are called…
A. Groundlings
B. Quantums
C. Spectrums
D. Amplitudes

Answers

A spectrum is a  pattern is unique to a substance and can be used identify it.

According to Max Plank, energy occurs in packets called quanta. Hence, energy is not continuous but takes on discrete values which are integer multiples of a fundamental amount.

Again, when a substance is given light energy, a characteristic fingerprint is obtained. This pattern is unique to the substance that has it. These characteristics “fingerprints” are called spectrums.

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31.) How far can a rock fly(meters). if the slingshot has a total potential of 500 Joules, and when releasing the slingshot exerts a total amount of 25 Newtons?​

Answers

Faltan 5 pe pa comprar ese vi pa to mar con lo pi en la plazaa

calculate the speed of a train that travels 540 km in 9 hours​

Answers

Answer:

s=d/t. d=540 t=9h

540÷90=6 km/h

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Directions: Type the correct conjugations. Less cigarette smoke means healthier kids. Secondhand smoke is a trigger for asthma. Studies show that laws banning smoking spare many asthmatic children from hospital visits. It suggests that smoke-free laws have even greater health benefits than previously believed. Researchers in Scotland looked at hospital admissions for children under age 15 who had experienced asthma attacks. They found that asthma emergencies declined after Scotland banned smoking in public. Other countries, such as Britain, France, and Germany, have smoking laws now. Many restaurants, parks, and workplaces are smoke-free.Do It!Smoking bans are _________.Press enter to interact with the item, and press tab button or down arrow until reaching the Submit button once the item is selectedA effectiveB temporaryC incompleteD hostile PLEASE HELP WITH THIS ONE QUESTION What statement about the inheritance of mitochondrial DNA is true?A) The sperm cell donates most of the material in the cytoplasm to the zygote, including mitochondrial DNA.B) The egg and sperm cells contribute equal amounts of mitochondrial DNA to the zygote.C) The egg cell donates most of the material in the cytoplasm to the zygote, including mitochondrial DNA.D) The sperm cell donates most of the DNA in the nucleus to the zygote, including mitochondrial DNA. The map below shows that______.a. Australia is part of Asiab. Asia is the largest continentc. Africa is the smallest continentd. North and South America are considered as one continent The meeting of people as a romantic engagement is known as a. Courtship. C. Socialization. B. Dating. D. None of the above Please select the best answer from the choices provided A B C D. 26. A(-4, -1), B(-4, 6), C(2,6), D(2, -4) What has a slope of -1/2 and an x intercept of -8 What is the multiplicative inverse for dividing 5\6 by 7\11 The landscape and sky around the family in Lange's Homeless Family are an example of color form line space How does your power output in climbing the stairs compared to the power output of a 100 watt. what is the best response to the following question? para qu usamos un ratn? para escuchar para navegar para hablar para ver la informacin Matilda earns 48$ in 4 hours, How many hours does it take her to earn 288$? 5. How did control of the Korean peninsulachange from September to November in 1950? Who is depicted in the image above? Solve: 1.Square both sides of the equation.2.Expand the left side.(3 k)(3 k) = 3k + 13.Multiply9 6k + k2 = 3k + 14.Write the quadratic equation in standard form.k2 9k + 8 = 05.Factor the quadratic equation.(k 8)(k 1) = 06.Use the zero product property. The solutions to the quadratic equation are .The true solution(s) to the radical equation PLEASE HELP ME WILL GIVE BRAINLIEST FOR RIGHT ANSWER 100 points and only highly intelligent persons are qualified What is the equation for finding the value of x. I need to be able to put x into the equation and result in the square root. I need help with something in school. The LCM of 2, 3, and 4 is _____. 24 12 6 PLEASE HELP, I WILL MARK BRAINIESTwhat determines an atom's reactivity?#1. how many protons the atom contains #2. how many energy levels the atom contains#3. whether the atom is a metal or a non-metal#4. how many valence electrons the atom contains