Which of these is a conversion from chemical energy to mechanical energy?

A. A dark light bulb starting to glow

B. A ball rolling down a hill

C. A person lifting a weight

D. A potato being heated in an oven

Answers

Answer 1

Answer:

C . A person lifting a weight


Related Questions

Which of the following is most likely a homogeneous mixture?
O A. A tossed vegetable salad
B. Chunky peanut butter
O C. Chocolate chip cookies
OD. A vanilla milkshake

Answers

Answer:

D)A vanilla milkshake

Explanation:

D) A vanilla milkshake.

That’s the case because you can’t physically separate the different posts that make up the mixture.

Which of the following statements is true?

Sound vibrations are changed into electrical impulses by the eardrum.
It is dangerous to listen to sounds over 160 dBs.
High-pitched sounds have low frequencies.
All of the above.

Answers

Ya I don’t know I will try because plus is 8 is none one i I k will send

Answer:

all of the above!! :)))

Explanation:

a put question in screen shot

Answers

Answer:maybe 2

Explanation:

Answer:

2

Explanation:

1-Which reaction shown below is carried out by nitrifying bacteria? I will mark you as brainlist
Choose:

A.{ammonium} to {nitrate}

B.{nitrate} to {nitrogen gas}

C.{nitrogen gas} to{ammonium}

Answers

Answer:

ammonium to nitrate.

Explanation:

they tie em together

What is the similarity between speed and vilocity

Answers

Speed and velocity both represent a way to measure the change in position of an object relative to time. In fact, for a straight line motion, the speed and velocity of an object are the same (since distance and displacement will be the same). Speed and velocity are measured in the same units: meters per second or m/s.
Hope this helps!

What does a dissolved salt look like?
A. The salt crystals are surrounded by water molecules.
B. The salt crystals separate into salt molecules in the water.
C. The salt separates into ions that settle to the bottom
D. The ions in the salt are surrounded by water molecules.

Answers

Answer:

I want to say your answer is B)

The answer is D because the ions in the salt will be surrounded by water molecules

Dissolution in water occurs as a result of ionic interactions. This means that the ions (charged atoms) of the solute has to interact with the ions of water for the solute to dissolve. Based on this principle, only polar compounds can dissolve in water.

According to this question, salt is polar because it contains positive (+) and negative (-) ions. Hence, when placed in water, these ions will interact with the ions of water i.e. H+ and OH-. This causes dissolution of salt in water to form salt solution.

Hence, a dissolved salt will look like "ions in the salt are surrounded by water molecules".

Learn more: https://brainly.com/question/8620871

Static electricity is
a closed conducting path
when electrons move easily through objects
build up of electrical charges by friction

Answers

Hey there !

The answer is C. build up of electrical charges by friction


Static electricity is a stationary electric charge, typically produced by friction, which causes sparks or crackling or the attraction of dust or hair.

Hope this helps !

1. What are the trends for atomic size across a period and down a group for the
main group elements?
2. Draw the following Lewis structures:
a) ammonium ion b) sulfur trioxide c) hydrogen cyanide
3. Using formal charge formula (or electronegativity differences), to determine
the following the best structure, OCS, COS or CSO.

Answers

Answer:

Here's what I get  

Explanation:

1. Trends in atomic size

Atomic size tends to decrease from left to right across the Periodic Table.

You are adding one electron at a time. the electrons repel each other, so the size should increase.

You are also adding a proton to the nucleus. The additional attraction should pull the electrons closer to the nucleus.

The nuclear pull wins, so the atoms get smaller from left to right

Atomic size increases from top to bottom of a Group.

You are adding electrons to an extra shell, so the size should increase.

You are also adding protons to the nucleus, so the size should decrease.

The size of the outer shell wins, so the atomic size increases going down a Group.

2. Lewis structures

(a) Ammonium ion

N is the central atom. The N atom has the positive charge.

(b) Sulfur trioxide

S is the central atom, with a double bond to each of the three O atoms.

(c) Hydrogen cyanide

C is the central atom, with a triple bond to the N atom.

3. COS

The best structure is that of O=C=S. It has no formal charges.

The Lewis structures for the other arrangements have formal charges.

The correct answers of this question is given below.

1. The atomic size increases going down a Group.2. (a) Ammonium ion : The N atom has the positive charge.    (b) Sulfur trioxide : Having double bond to each of the three O    atoms.    (c) hydrogen cyanide : Having a triple bond to the N atom.3. COS and it has no formal charges

What is Periodic table?A table in which the chemical elements are arranged in order of increasing atomic number.A periodic table has 118 known elements The chemical elements are arranged from left to right and top to bottom in order of increasing atomic number.What is the explanation for this answers?1. Trends in atomic size : Atomic size tends to decrease from left to right across the Periodic Table.You are adding one electron at a time. the electrons repel each other, so the size should increase.You are also adding a proton to the nucleus. The additional attraction should pull the electrons closer to the nucleus.The nuclear pull wins, so the atoms get smaller from left to right.Atomic size increases from top to bottom of a Group.Adding electrons to an extra shell, so the size should increaseAdding protons to the nucleus, so the size should decrease.The size of the outer shell wins, so the atomic size increases going down a Group.

2. Lewis structures :

(a) Ammonium ion : N is the central atom. The N atom has the positive charge. (b) Sulfur trioxides :  S is the central atom, with a double bond to each of the three O atoms.(c) Hydrogen cyanide: C is the central atom, with a triple bond to the N atom

3. COS

The best structure is that of O=C=S. It has no formal charges.The Lewis structures for the other arrangements have formal charges.

Learn more about atomic size below,

https://brainly.com/question/25003370

#SPJ2

If a buffer has an initial pH of 6.34 and the acid has a Ka of 3.46 × 10-4, what is the ratio of conjugate base to weak acid in the buffer system?

Answers

Answer: The ratio of conjugate base to weak acid in the buffer system is 758 : 1

Explanation:

The dissociation constant for  acid = [tex]K_a=3.46\times 10^{-4}[/tex]

pH = 6.34

First we have to calculate the value of [tex]pK_a[/tex].

The expression used for the calculation of [tex]pK_a[/tex] is,

[tex]pK_a=-\log (K_a)[/tex]

Now put the value of [tex]K_a[/tex] in this expression, we get:

[tex]pK_a=-\log (3.46\times 10^{-4})[/tex]

[tex]pK_a=3.46[/tex]

Now we have to calculate the ratio of conjugate base to weak acid in the buffer system

Using Henderson Hesselbach equation :

[tex]pH=pK_a+\log \frac{[\text {conjugate base}]}{[Acid]}[/tex]

Now put all the given values in this expression, we get:

[tex]6.34=3.46+\log \frac{[\text {conjugate base}]}{[Acid]}[/tex]

[tex]\frac{[\text {conjugate base}]}{[Acid]}=758[/tex]

Therefore, the ratio of conjugate base to weak acid in the buffer system is 758: 1

Answer:

A. 1:0.46

Explanation:

I took the test

pls help Photosynthesis is used to produce food for plants in the form of glucose. In the process, oxygen is released. As shown in the diagram, plants require water and carbon dioxide (from the air). What else is required for photosynthesis and what role does it play? A) Light is required to provide energy for photosynthesis. B) ATP is required as an energy source for photosynthesis. C) Glucose is required as an energy source for photosynthesis D) Oxygen is required to split water molecules in photosynthesis.

Answers

Answer:

A) light is required

Explanation:

ATP, Glucose, and oxygen are created from the process

After constructing the circuit, Aliyah and Jeremy noticed that the light bulb stays on all the time. This means the batteries will get used up when the flashlight does not need to be on. What is something Aliyah and Jeremy can do to solve this problem?

Answers

Answer: Implement a switch

Explanation:

This forms a circuit break or way to easily turn the flow of electricity on or off.

bases have a pH of

a. more than 7
b. less than 7
c. 7

Answers

Answer:

Bases are more then 7

acids are less then 7 neutral is 7 and bases are more than

Answer:

A. More than 7

Explanation:

ph scale, bases are to the right

Describe the interactions with the Sun, Earth and Moon system that result in Lunar Cycle / Phases.

Answers

Answer: The tides are another interaction in the sun-earth-moon system. The tides happen because the moon and sun pull on the oceans, causing them to rise and fall each day. The moon has a bigger effect than the sun because it is closer. The angle of the sun as the earth orbits over the course of a year causes the seasons.

Explanation:

I need the correct answer

Answers

Answer:

d.

Explanation:

They can be spread through contaminated surfaces.

Answer:

d

Explanation:  pathogens csnnot be spread be sontaminated surfesec

Inside the retina of our eyes are receptors called rods and cones. Rods measure the brightness we see and cones determine _____.
A) the color we see
B) the white we see
C) the dimness we see
D) the loudness we hear

Answers

I believe the answer is C. 20 characters

NEED ASAP WILL MARK BRAINLIEST ON TIMER
A student determines that she used 0.0665 mol of sodium hydroxide (NaOH) to completely titrate 25.00 mL of sulfuric acid solution (H2SO4). What is the molarity of the sulfuric acid?
0.00131 M
0.00262 M
1.31 M
2.62 M

Answers

i think the answer is 1.31m

hope this helps :)

A student determines that she used 0.0665 mole of sodium hydroxide (NaOH) to completely titrate 25.00 mL of sulfuric acid solution. The molarity of the sulfuric acid is 1.31 M. Therefore, option C is correct.

What is molarity?

Number of moles of solute per liter of solution is known as molarity.

The balanced chemical equation for the reaction between sodium hydroxide and sulfuric acid is:

2 NaOH + H₂SO₄ → Na₂SO₄ + 2 H₂O

According to the balanced equation, one mole of sulfuric acid reacts with two moles of sodium hydroxide. Therefore, the number of moles of sulfuric acid in the titrated solution can be calculated as:

moles of H₂SO₄ = (moles of NaOH) / 2

moles of H₂SO₄ = 0.0665 mol / 2

moles of H₂SO₄ = 0.03325 mol

The volume of the sulfuric acid solution used in the titration is 25.00 mL, which is equivalent to 0.02500 L. The molarity (M) of the sulfuric acid can be calculated as:

Molarity of H₂SO₄ = moles of H₂SO₄ / volume of H₂SO₄ solution in liters

= 0.03325 mole / 0.02500 L

= 1.31 M

Thus, option C is correct.

To learn more about the molarity, follow the link:

https://brainly.com/question/8732513

#SPJ3

An exothermic reaction releases 13,450J of heat. How many calories of energy are released? A) 5 56,274 calories B)1,244 caloriesC) 134,500 caloriesD) 3,215 calories

Answers

Answer:

The correct option is;

D) 3,215 calories

Explanation:

Here we are required to convert 13,450 J to calories

1 calorie is the amount of heat required to raise the temperature of 1 gram of water by 1°C

Therefore, 1 calorie = 4.184 Joules

Hence, 1 Joule = 1/4.184 calorie for which we have;

13,450 J = 13,450 × 1/4.184 calories = 13,450/4.184 calorie

13,450 J = 3,214.63 calories

Rounding up to the nearest  whole number, we have;

13,450 J ≈ 3,215 calories.

60.0 g of NH Cl are dissolved in 100 grams of water at 60.0° C. This solution is
A
supersaturated
B
saturated
С
unsaturated
D
none of the above

Answers

Answer:

B) is the correct answer

In the reaction N2 + 3H2 - 2NH3, how many
grams of H, are needed to produce exactly I mole
of ammonia?
A. lg
B. 2g
C.3g
D.4g

Answers

Answer:

B. 2g

Explanation:

So first you have to find the mole to mole ratio then convert it to grams if that makes sense. So the mole to mole ratio is 2 ammonia to 3 hydrogen gas. So then after you do that conversion you can solve for grams then. Sorry I am not that great at explaining.

Where does your body get the energy needed to transform into kinetic energy to move around all day

Answers

Answer:

food, mostly consists of what you eat.

Explanation:

The body get the energy needed to transform into kinetic energy from food.

Food:

Every body part (muscles, brain, heart, and liver) need energy to work. This energy comes from the food we eat. Our bodies digest the food we eat by mixing it with fluids (acids and enzymes) in the stomach.

The main sources of energy are: carbohydrates, lipids, and proteins.

Find more information about Food here:

brainly.com/question/25884013

what two factors does elastic potential energy depend upon

Answers

Answer: Spring constant k as well as the distance stretched

Explanation:

Elastic potential energy is Potential energy stored as a result of deformation of an elastic object, such as the stretching of a spring. It is equal to the work done to stretch the spring, which depends upon the spring constant k as well as the distance stretched.

Mosquitoes lays eggs that must hatch in water. The young, called larvae live their first few days in water

Which sentence best describes where you will most likely find mosquitoes and their eggs during the dry season in the Florida Everglades?


A.They will be spread out because water is everywhere.


B.They will be mainly in one area because water is everywhere

C. They will be in fewer areas because water is scarce

D. They will be everywhere because water is scarce.

Answers

Answer:

Explanation:

I believe he is C

How does the pressure of a container change as the volume is changed?

Answers

Answer: If the volume is decreased, the pressure would increase because the gas molecules have less space to move around. Same goes for the opposite; if the volume increased, the pressure would decrease because the molecules have more space to move and aren't packed as tightly .  

Hope this helps!!!

EMERGENCY: I WILL FAIL: PLS HELP WILL MARK BRAINLIEST JUST PLS HELP

Answers

Answer:

condensation: moisture builds up on window; dew forms on blades of grass

deposition: snow is made inside a cloud; frst froms on window?

Explanation:

Which of the following best summarizes photosynthesis?
A.A chemical reaction involving nitrogen and other atmospheric gases
B.An adaptation of plants that allows them to add nutrients to the soil
C.A process by which plants produce sugar using the energy of sunlight
D.An exchange of gases between animals and the air or water of their habitat

Answers

Answer:

c. a process by which plants produce sugar using energy of sunlight

To measure the volume of a washing machine, use:
liters
kiloliters
kilograms
tons

Answers

Answer:

kg

Explanation:

Answer:

You should use tons or kilograms because a washing machine is very heavy.

(Hope this helps)

Relate dark matter to the development of the universe after the Big Bang. In 3-5 sentences, speculate on how the development of the universe would have been different if there had been no dark matter. In your answer, use the term structures.

Please answer if you do i will mark you as brainliest

Answers

Answer:

Without dark matter galaxies would loose an extreme amount of gas required to create stars.

Without dark matter the universe wont have as many galaxies clumped together forming larger versions of those galaxies. This would cause a change in the structure of the "skeleton" of the web.

(Hope this can help, I didn't do exactly as it is said to because that is your job)

:)

Explanation:

Forbes gives somewhat of an explanation if you are curious.

(Ethan Siegal, "The Universe Would Be Very Different Without Dark Matter", Forbes)

Dark matter makes up most of matter in the universe and is found by a quarter of the total composition of the space. After the event of the big bang, the universe expanded and dark matter grew.

Dark matter accounts for about 85% of the matter in the universe. Its presence can be felt in the gravitational effects. Dark matter doesn't interact with the electromagnetic field. After the big bang event, the dark matter still can be found in larger galaxies and contest about 26% of mass-energy and 69% of dark energy. If there had been no dark matter there would be no structure of the cosmic web of galaxies. That is there would be no connection between the galaxies and would remain in isolated fragments.

Thus dark matter is a link within and with the comic web.

Learn more about the dark matter and its development-related after the big bang event

brainly.com/question/16725768.

What type of bond is formed during dehydration synthesis?
O A
carbon bonds between amino acids
B.
carbon bonds between carbohydrates
C. hydrogen bonds between lipids
O D. peptide bonds between amino acids

Answers

The answer is A hope this helps

A carbon bond between the amino acids is formed in a dehydration reaction. So the correct option is A.

What is a dehydration reaction?

A reaction where two smaller molecules are combined in a chemical manner by the removal of an element from each of these molecules is called a dehydration reaction. Organic compounds are classified on the basis of structure. They are classified as aliphatic and aromatic compounds. Different kinds of chemical reactions are involved in the formation of new compounds when there is a change in bonding between the atoms.

There are some chemical reactions that form a molecule and some only show a displacement or substitution of atoms. There are synthesis or combination reactions that involve a combination of two substances to form one molecule.

On the other hand, there are decomposition reactions in which one substance decomposes to form more than one substance. There are displacement reactions which can be single or double displacement. They involve the displacement of one or more components of compounds among each other. Addition, substitution, rearrangement, elimination, and oxidation-reduction reactions are some of the common organic reactions.

Therefore, the correct option is A.

Read more about chemical reactions, here

https://brainly.com/question/3461108

#SPJ2

As the kinetic energy of particles of matter increase, the distance between the particles?

Answers

The distance between the particles move farther apart. When the kinetic energy of the particles increases it causes the particles to move further apart.

A 350. mL air sample collected at 35 degrees C has a pressure of 556 mm Hg.
What pressure will the air exert if it is allowed to expand to 425 mL at 57 degrees
C? Show your work in the space below.​

Answers

Answer:

485 torr

Explanation:

Explanation:

We can solve this equation using the combined gas law:

P1V1/T1=P2V2/T2

Remember, always use the absolute (Kelvin) temperature when working with gas equations.

The temperature conversions are

T1=C+273=35o+273=308K

T2=57C+273=330K

Since we're trying to find the final pressure, let's rearrange this equation to solve for

P2:

P2=P1V1T2/T1V2

Our known values:

P1= 550 torr

V1=350mL

T1=308K

V2=425"mL

T2=330K

Let's plug these into the equation to find the final pressure:

The final pressure after it is subjected to these changes is thus 485torr

Other Questions
In a nuclear reaction, which of the following must be conserved?A. the number of neutronsB. the count of nucleonsC. chargeD. the number of electrons The process through which humans breed other animals and plants for particular traits:A) artificial selection B) genetic engineering C) genesD) selective breeding E) traits 1 PointA play is staged by two different directors. In the first version, the maincharacter, a lawyer, shouts when he speaks and interrupts his listeners. In thesecond version, the main character speaks more quietly, awaiting his turn inconversation. How would an audience member most likely view the characterin the first play when compared with the character in the second play?A. He will seem more authoritative.B. He will seem more arrogant.C. He will seem to be lying.D. He will seem less intelligent. The radius of a circle is 6mm. What is the area of the shaded portion of the circle. Find the area of the trapezoid.4 cm7 cm3 cm3 cm Which of the following statements regarding selenium/selenoproteins is incorrect? a. They are proven protection against colon cancer. b. The amount of selenium in foods depends upon the soil where the plants were grown and animals grazed. c. Selenium functions as an antioxidant. d. Selenium plays an important role in the regulation of thyroid hormones. which expresion has a valume of 7/12 Which equation has no solition HELP I NEED THIS ASAP! IF ANYONE CAN HELP ME SOLVE THIS I WOULD BE REALLY GRATEFUL! 1: In passage one, which of the following is not a historical reference offered by the author as a supporting detail in this article?OA: 13 starsOB: The Lincoln MemorialOC: MonticelloOD: The White House HHELP HELP PLZZ PLZ SHOW WORK PLZZZZZ Do women ask for assistance more frequently than men do What is the original source of energy in a food web? write one verse of a original song that YOU are making about how we will get through coronavirus make sure has figurative language and is kind of funny What is the most empathetic statements to a patient who is dying? The perimeter of a standard-sized rectangular rug is 36 ft. The length is 2 ft longer than the width. Find the dimensions. Which phrase represents this expression?(4717)4A. 4 times the difference of 47 and 17B. 4 times the difference of 17 and 47C. the difference of the product of 4 times 17 and 47D. the difference of 47 and the product of 4 times 17 The amplitude of a wave is the vertical distance from the midpoint to either the crest or thetrough of the waveTrueFalse you want to start a necklace making business. You spend $0.68 on string for each necklace and $0.25 on beads for each necklace. You sell your necklacesfor $2.00 each. If you sell 30 necklaces, how much profit will you make? Today, Isaac needs to walk his dog, water the garden, and feed his fish. DDD is the number of minutes it takes to walk his dog, GGG is the number of minutes it takes to water the garden, and FFF is the number of minutes it takes to feed his fish. The expression G+(D+F)G+(D+F)G, plus, (, D, plus, F, )describes the total number of minutes it takes Isaac to do all three tasks. We can also use the expression (G+D)+F(G+D)+F(, G, plus, D, ), plus, F to represent the same quantity. Match each amount in the situation with the expression that represents it. For reference: The dog is an animal, and he needs to go outside to walk. The garden is a bunch of plants (not an animal), and it is outside. The fish is an animal, and she lives in a water tank inside.