energy released in a chemical reaction comes from ?

Answers

Answer 1
Chemical reactions often involve changes in energy due to the breaking and formation of bonds. Reactions in which energy is released are exothermic reactions, while those that take in heat energy are endothermic.

Related Questions

Which object has the magnetic domains shown in the image?
A steel paper clip near a magnet
B. A piece of wood near a magnet
C. A piece of wood, not near a magnet
D. A steel paper clip, not near a magnet​

Answers

Answer:

Explanation:

D

Answer: For those who test is different .. the answer is “ An Iron nail, not near a magnet”

Explanation:

Height of cannon 5 m, initial speed of projectile 15m/s, angle of launch 0 degrees. What is the range and time in the air? Please show work!

Answers

Answer:

The range is 15.15 m and the time in the air is 1.01 s

Explanation:

Horizontal Motion

When an object is thrown horizontally (with angle 0°) with a speed v from a height h, it follows a curved path ruled exclusively by gravity until it eventually hits the ground.

The range or maximum horizontal distance traveled by the object can be calculated as follows:

[tex]\displaystyle d=v\cdot\sqrt{\frac {2h}{g}}[/tex]

To calculate the time the object takes to hit the ground, we use the equation below:

[tex]\displaystyle t=\sqrt{\frac{2h}{g}}[/tex]

The cannon is shot from a height of h=5 m with an initial speed of v=15 m/s. The range is calculated below:

[tex]\displaystyle d=15\cdot\sqrt{\frac {2*5}{9.8}}=15*1.01[/tex]

d = 15.15 m

The time in the air is:

[tex]\displaystyle t=\sqrt{\frac{2*5}{9.8}}[/tex]

t = 1.01 s

The range is 15.15 m and the time in the air is 1.01 s

dentify the following terms associated with the water cycle.


Water changes from a gas to a liquid phase.


Water falls to the Earth in the form of a liquid or solid.


Liquid water changes into a gas.


Water evaporates from the leaves of plants.

Answers

Answer:

condensation, precipitation, evaporation, transpiration

Explanation:

condensation is when gas condenses into liquid, precipitation is when water comes from the sky like in rain, evaporation is when water is converted from liquid to gas, transpiration is when water is evaporated from leaves.

QC A string fixed at both ends and having a mass of 4.80g , a length of 2.00 m , and a tension of 48.0 N vibrates in its second (n=2) normal mode. (b) What is the ratio of the wavelength in air of the sound emitted by this vibrating string and the wavelength of the wave on the string?

Answers

The ratio of the wavelength in air of the sound emitted by this vibrating string and the wavelength of the wave on the string is 2:1.

Frequency of the wave

f = n/2L(√T/μ)

where;

n is number of nodesL is length of the stringT is the tension of the springμ is mass per unit length

μ = 0.0048 kg / 2 m = 0.0024 kg/m

f = 2/(2 x 2) (√48/0.0024)

f = (¹/₂)(√20,000)

f = (¹/₂)(141.42)

f = 70.71 Hz

Speed of sound in string

v = √T/μ

v = (√48/0.0024)

v = 141.42 m/s

wavelength of the wave on the string

λ = v/f

λ = (141.42) / (70.71)

λ = 2 m

Wavelength in air of the sound emitted

Speed of sound in air, v = 332 m/s

λ = v/f

λ = 332 / 70.71

λ = 4.7 m

Ratio of the wavelengths = 4.7 m / 2m = 2.3/1 ≈ 2 : 1

Thus, the ratio of the wavelength in air of the sound emitted by this vibrating string and the wavelength of the wave on the string is 2:1.

Learn more about wavelength here: https://brainly.com/question/10750459

#SPJ1

You are walking in Paris alongside the Eiffel Tower and suddenly a croissant smacks you on the head and knocks you to the ground. From your handy dandy tourist guidebook you find that the height of the Eiffel Tower is 144.3 m. If you neglect air resistance, calculate how many seconds the croissant dropped before it tagged you on the head assuming it started with a velocity of 0 m/s. (TWO decimal places!!)

Answers

The time taken by the croissant before it strike on the head is 5.4 s

Lets assume the height of the man is 1.3 m

Given height of the Eiffel Tower is 144.3 m

So the distance croissant travel before it hits the man on the head

= 144.3 - 1.3 m

= 143 m

According to the Second Equation of Motion which relates distance with the acceleration and time, we can say that

[tex]S = ut + \frac{1}{2} a t^{2}[/tex]

here u = 0

a = g = 9.81 m/s²

S = 143 m

therefore [tex]S = \frac{1}{2} gt^{2}[/tex]

[tex]t = \sqrt{\frac{2S}{g} }[/tex]

[tex]t = \sqrt{\frac{2 * 143}{9.81} }[/tex]

[tex]t = \sqrt{29.154}[/tex]

t = 5.4 s

Therefore, if the air resistance is neglected the croissant will drop 5.4 s before it tagged the man on his head.

To know more about Eiffel Tower,

https://brainly.com/question/28408197

#SPJ1

Match the term with its definition.

TERMS:
Alluvium, Delta, Meander, Tributary.

DEFINITIONS:
The mouth of a river.
Fertile sediment deposited by a river.
A curve in a river.
A stream that flows into a river.

Answers

Answer:

A stream that flows into a river - TributaryThe mouth of a river - DeltaA curve in a river - MeanderFertile sediment deposited by a river - Alluvium

Hope it helps!

Meander : A curve in a river, Delta: Mouth of the river, Tributary : A stream that flows into a river.

What is Meandering?

A river or other watercourse's channel may contain several regular, sinuous curves called meanders. It is created when a watercourse deposits sediments on an inner, convex bank, which is often a point bar and erodes the sediments of an outer, concave bank (cut bank). The channel migrates back and forth across the axis of a floodplain as a result of this combined erosion and sedimentation, forming a sinuous flow.

A freshwater stream that flows into a bigger stream or river is called a tributary. The mainstream of a river refers to its parent, or bigger, river. The confluence is the location where a tributary joins the main stem.

Tributaries, often known as effluents, do not enter the ocean directly.

To get more information about meandering :

https://brainly.com/question/7560368

#SPJ5

PPL how many types of turtles are there

Answers

Explanation:

356 species of diff turtles

question 2(multiple choice worth 5 points) (01.07 mc) distances in space are measured in light-years. the distance from earth to a star is 6.8 × 1013 kilometers. what is the distance, in light-years, from earth to the star (1 light-year

Answers

The distance in light years from earth to Star is 7.1 Light Years.

We have the distance from earth to a star is 6.8 × 10¹³ kilometers.

We have to convert it into light years.

What is a Light Year?

Light year is a unit of astronomical distance equivalent to the distance that light travels in one year.

1 Light year = 9.4607 × 10¹³ km

According to the question, we have -

Distance from Earth to Star = 6.8 × 10¹³ km.

Now -

1 Light year = 9.4607 × 10¹² km

or

9.4607 × 10¹²km = 1 Light years

1 km = [tex]$\frac{1}{9.4607\times 10^{12} }[/tex] Light years

Therefore -

6.8 × [tex]10^{13}[/tex] km = [tex]$\frac{6.8\times 10^{13} }{9.4607\times 10^{12} }[/tex] = 0.71 x 10 = 7. 1 Light Years.

Therefore, the distance in light years from earth to Star is 7.1 Light Years.

To solve more questions on Light year, visit the link below-

https://brainly.com/question/13432741

#SPJ4

Lars is standing near the edge of a 90-meter cliff. He throws a ball upward, but does not catch it, and it falls to the bottom of the cliff face. From when he threw the ball upward to when it hit the ground below, 5.55 seconds passed. What was the initial vertical velocity of Lars' throw?
a. -43 m/s
b. -11 m/s
c. 43 m/s
d. 11 m/s

Answers

Answer:

c. 43 m/s

Explanation:

Given the following data;

Displacement, S = 90 meters

Time, t = 5.55 seconds

To find the initial velocity;

We would use the second equation of motion given by the formula;

[tex] S = ut + \frac {1}{2}at^{2}[/tex]

Where;

S represents the displacement or height measured in meters. u represents the initial velocity measured in meters per seconds. t represents the time measured in seconds. a represents acceleration measured in meters per seconds square.

We know that acceleration due to gravity is -9.8m/s² because the direction is downward.

Substituting into the equation, we have;

[tex] 90 = u*5.55 + \frac {1}{2}*(-9.8)*5.55^{2}[/tex]

[tex] 90 = u5.55 - 4.9*30.8025[/tex]

[tex] 90 = u5.55 - 150.93225[/tex]

Rearranging the equation, we have;

[tex] u5.55 = 90 + 150.93225[/tex]

[tex] u5.55 = 240.93225[/tex]

[tex] u = \frac {240.93225}{5.55}[/tex]

Initial velocity, u = 43.41 ≈ 41 m/s

Present Your Findings
In the essay box, compose a scientific report which includes your observations, data, and conclusions. The following questions should be answered in your conclusion.

Why does the first method for determining volume work only for a regularly shaped object?
Will the second method for determining volume work for any object or just an irregularly shaped one? Why?
Is one method of measurement more accurate than the other? Why or why not?
Would the displacement method of measurement work for a cube of sugar? What about a cork? Why or why not?
What did you find out from this investigation? Be thoughtful in your answer.

Answers

This question would be a piece o' cake, except that we don't know your observations, your data, or your conclusions.

We also don't know the first method, the second method, the accuracy of either method, the displacement method, or what you found out from this investigation.

Otherwise, like I said, this is really no problem.

A car has a speed of 12m/s. The mass of the car and its passengers is 1250 kg. What is the total momentum of the car/passengers? (assuming the car moves in the positive direction)

p= kgm/s

Answers

Answer:

15000kgm/s

Explanation:

Given parameters:

Speed of the car  = 12m/s

Mass of car and passengers = 1250Kg

Unknown:

Momentum of the car  = ?

Solution:

Momentum is the quantity of motion a body posses;

  Momentum  = mass x velocity

Now insert the given parameters and solve;

  Momentum  = 12 x 1250  = 15000kgm/s

NEED HELP ASAP

ONLY ANSWER IF YK THE ANSWERS

Answers

Answer:

there yah go that's the answer

hi i need help pls help me

Answers

The correct answer would be the last one

Answer:

best answer would be a

Explanation:

d is just a law

c is just the start of a paragraph

and b would be a revision or addtion to the already amendments

Jordan tells a coworker, “I appreciate you filling in for me while I was sick and processing all those expense reports. You improved tremendously between the first report you processed and the last one. I can see your skills developing!” What is Jordan offering her coworker?

A.
encouragement

B.
empathy

C.
external training

D.
benefits

Answers

Answer:

Explanation:

A. Encouragement

Heat transfer occurs only in 1 case from body II to body I, 2. Heat transfer occurs only in 2 cases from body I to body II, 3. Heat transfer occurs only in 3 cases from body II to body I, 4. Heat transfer occurs in all cases from body II to body I.

Answers

Answer:

whats the question???

5. An object accelerates from 10km/h at a rate of 5m/s2. What distance has the object traveled when it
reaches a speed of 50km/h?

Answers

Explanation:

de06dyoirad0tsxgoyddyppdy

A ball free falls from the top of the roof for 5 seconds. How far did it fall?

Answers

Answer:

Taking the value of acceleration due to gravity as 9.8 m/s^2, the object fell for about 122.5 metres.

Question 14 (3 points)
What part of volcano carries magma from the magma chamber to the vent? (3 points)
Vent
Magma Chamber
Lava Flow
Conduit
d

Answers

you may check it online

Vent carries magma from the magma chamber

When two polarizers are overlapped, what angle relative to one another will allow for all of the incoming light to be blocked? *​

Answers

Answer:

  90°

Explanation:

The intensity of the transmitted light is proportional to the square of the cosine of the angle between polarizer axes. That cosine is zero when the angle is 90°.

A toy car accelerates at 3 m/s2 for 2 seconds. Its final velocity is 15 m/s, What is its initial velocity?

Answers

Answer:

can i have the toy car after your done asking questions with it

Explanation:

I need help with the 1st and the 3rd one plzzzzzzzzzzzzz

Answers

Answer for the first one is 2. The answer for the 3rd one is 8

Projectile motion challenge problem. You are at war. You are stationed with a cannon that can only fire shells at 100 m/s. You may adjust the angle but it takes five seconds to do so. You are positioned on a strategically important bridge 70m high with a mission to protect it from the enemy. Spotters have alerted you to a remote controlled speedboat 3000 m away heading West to your position. It is carrying a bomb to blow up the bridge. The spotter tells you that its initial velocity is 26 m/s and its accelerating at 11 m/s2. You must fire the cannon and destroy the boat as fast as possible before it reaches the bridge. When the speedboat is 3000 m away set that as time = 0s. A. What time do you fire and what is the angle when you do fire? B. Right before you fire a 10m/s wind starts blowing from behind you towards the East. How do you adjust your fire?

Answers

Answer:

A. the time of fire is 15 seconds, and the angle of fire is approximately 23.794° above the horizontal

B. The angle of fire is increased to approximately 35.4126° above the horizontal

Explanation:

A. The height of the bridge, h = 70 m

The speed with of the shell, v₀ = 100 m/s

The location of the speedboat = 3000 m

The direction of the speedboat = 26 m/s

The acceleration of the speedboat, a = 11 m/s²

Let t represent the time of firing the shells, and let x represent the distance of the speedboat from the bridge, and let θ, represent the angle to fire with, we have;

For the speedboat, t = x/(100 × cos(θ))

We note that the time the shell can travel the 3,000 m = 30 seconds

Therefore an adequate time to fire is, t = 15 seconds

The distance the speedboat covers in 15 seconds is given as follows;

s = u·t + 1/2·a·t²

s = 26 × 15 + 1/2 × 11 × 15² = 1627.5 m

At the point the speedboat had traveled 1,627.5 m, the distance of the speedboat, x is then 3000 - 1,627.5 = 1,372.5 m from the bridge, the angle of fire is given from the following formula;

t = x/(100 × cos(θ))

15 = 1,372.5/(100 × cos(θ))

cos(θ) = 1,372.5/(15 × 100) = 0.915

θ = cos⁻¹(0.915) ≈ 23.794°

The angle of fire, θ ≈ 23.794° above the horizontal in the direction of the speedboat

B. Given that a 10 m/s wind is blowing towards East, we have;

The horizontal velocity towards East = 10 + v₀ × cos(θ)

The angle of firing is therefore, given as follows;

15 = 1,3725.5/(10 + 100 × cos(θ))

(10 + 100 × cos(θ)) = 1,3725.5/15

100 × cos(θ) = 1,372.5/15 - 10

cos(θ) = (1,372.5/15 - 10)/100 = 0.815

θ = cos⁻¹(0.815) ≈ 35.4126°

Therefore, the angle of fire, θ, will be increased to approximately 35.4126° above the horizontal in the remote controlled speedboat direction.

Consider an electric field that is uniform in direction throughout a certain volume. Can it be uniform in magnitude? Must it be uniform in magnitude? Answer these questions (a) assuming the volume is filled with an insulating material carrying charge described by a volume charge density

Answers

The electric field cannot and must not be of uniform magnitude if the volume is filled with an insulating material carrying charge described by a volume charge density

Consider a gaussian surface in the shape of a rectangular box with two faces perpendicular to the direction of the field. Also, assuming this surface has a volume charge density that fills it up, it would therefore contain some charge. The net flow out of this box is nonzero. The field must be stronger on one side than the other. The field's magnitude cannot be uniform. Because the field’s magnitude cannot be uniform, therefore it is also impossible for it to be mandatorily uniform. A uniform magnitude thus defies gaussian postulate.

To learn more about electric field throughout a certain volume  described by a volume charge density, click https://brainly.com/question/13437822

#SPJ4

iconic compounds are highly conductive when dissolved in water

true or false

Answers

The given statement is TRUE

Iconic compounds are highly conductive when dissolved in water because the compounds hydrate ions after dissolving them in water.

Ionic compounds are a combination of metals and nonmetals, and as we know, metals are good conductors of electricity.

Also they conduct electricity well when dissolved in water, provided they are able to dissolve in water i.e. the solution so formed after dissolving the compound into water must be an aqueous solution.

An ionic compound consists of two oppositely charged ions.

Water, on the other hand, is a polar solvent; the electronegativity difference between oxygen and hydrogen is high, therefore water has a positive H pole and a negative O pole (water is H2O).

And therefore when the ionic compound is dissolved in water, the opposite ions from the compound gets attracted to the poles of water and forms a unique arrangement called hydration, and therefore the iconic compounds are highly conductive when dissolved in water

To know more about Iconic compounds,

https://brainly.com/question/14848573

#SPJ1

An electron has a speed of 0.750 c .(a) Find the speed of a proton that has the same kinetic energy as the electron.

Answers

By relativistic energy, the proton speed is 0.024c.

We need to know about relativistic energy to solve this problem. The rest energy of the object can be determined by

Eo = m₀ . c²

where Eo is rest energy, m₀ is rest mass and c is speed of light (3 x 10⁸ m/s).

The total energy of object can be described as

E = Eo / √(1 - v²/c²)

where E is total energy, v is the object speed.

The kinetic energy is

KE = E - Eo

From the question above, we know that :

mp = 1.6 x 10¯²⁷ kg

me = 9.1 x 10¯³¹ kg

c = 3 x 10⁸ m/s

ve = 0.75c

Find the rest energy of electron

Eo = me . c²

Eo = 9.1 x 10¯³¹ . (3 x 10⁸)²

Eo = 8.19 x 10¯¹⁴ joule

Eo = 8.19 x 10¯¹⁴ / (1.6 x 10¯¹⁹) eV

Eo = 511875 eV

Determine the total energy of electron

E = Eo / √(1 - ve²/c²)

E = 511875 / √(1 - (0.75c)²/c²)

E = 511875 / 0.66

E = 773882.26 eV

Calculate the kinetic energy of electron

KE = E - Eo

KE = 773882.26 - 511875

KE = 262007.26 eV

Find the rest energy of proton

Eo = mp . c²

Eo = 1.6 x 10¯²⁷ . (3 x 10⁸)²

Eo = 1.44 x 10¯¹⁰ joule

Eo = 1.44 x 10¯¹⁰ / (1.6 x 10¯¹⁹) eV

Eo = 900000000 eV

Determine the total energy of proton

E = KE + Eo

E = 262007.26 + 900000000

E = 900262007.3 eV

Find the speed of proton

900262007.3 = 900000000 / √(1 - v²/c²)

√(1 - v²/c²) = 0.9997

1 - v²/c² = 0.9994

v²/c² = 1 - 0.9994

v²/c² = 5.82 x 10¯⁴

v² = 5.82 x 10¯⁴ c²

v = 0.024c

Find more on relativistic energy at: brainly.com/question/23920189

#SPJ4

please help asap!!!!

Answers

Answer:

B

Explanation:

Discuss why physically active job does not guarantee better physical fitness

Answers

Well to begin with, everyone has different genetics and body types, which would mean that “looking fit” can look different on everyone. As well as how much physical exercise you’re doing and how much you’re getting your heart rate up. Overdoing physical fitness can also be damaging to health so there’s many factors to look into here.

21.
Figure 1 shows a person sliding down a zip wire.
Figure 1
Zip wire
Change
in vertical
height
(a) As the person slides down the zip wire, the change in the gravitational potential energy
of the person is 1.47 kJ
Eg=m
The mass of the person is 60 kg
gravitational field strength = 9.8 N/kg
Calculate the change in vertical height of the person.

Answers

Answer:

Seems like you desperately need answers

The potential energy change is 1.47 KJ or 1470 J. The weight of the person is given 60 kg. Thus vertical height of the person is 2.5 m.

What is potential energy?

Potential energy is a form of energy, generated by virtue of the position of an object in the gravitational field. Potential energy depends on the mass, acceleration and height from the ground at which the object is placed/

Thus, P = Mgh. Where m is mass, h is height and g be the acceleration due to gravity, which is equal to 9.8 m/s². It is given that the mass of the person is 60 kg.

The potential energy in the gravitational field is 1.47 KJ or 1470 J, now the height h of the person can be calculated as follows:

h = p/mg.

  = 1470 J/ (60 Kg × 9.8 m/s²)

  = 2.5 m

Therefore, the vertical height of the hanging person is 2.5 m.

To find more on potential energy, refer here:

https://brainly.com/question/24284560

#SPJ2

Your weight as measured on your bathroom scale is
a. equal to your mass
b. the force due to gravity on you
a property of mechanical equilibrium
d. all of the above
none of the above
C.

Answers

I think the answer is A.

The weight as measured on the bathroom scale is the force due to gravity. The correct option is b.

What is weight?

The weight of an object is the force acting on it due to gravity in science and engineering.

Weight is defined as a vector quantity in some standard textbooks, as the gravitational force acting on the object. Others define weight as a scalar quantity, the magnitude of gravity.

This is frequently expressed in the formula W = mg, where W is the weight, m is the object's mass, and g is the gravitational acceleration.

Bathroom scales for home use show your weight on a dial or a digital screen. These scales weigh you in one of two ways: mechanically, with springs, or electronically, with circuits that bend under weight, changing the current flowing through them.

Thus, the correct option is b.

For more details regarding weight, visit:

https://brainly.com/question/10069252

#SPJ2

A 18000 Hz wave has wavelength of 0.03 meters. How fast is this wave
traveling?

Answers

Answer:

540m/s

Explanation:

Given parameters:

Frequency of the wave = 18000Hz

Wavelength of the wave = 0.03m

Unknown:

How fast is the wave traveling = ?

Solution:

How fast the wave is traveling is a measure of the speed of the wave;

     Speed of wave  = frequency x wavelength

Now insert the given parameters and solve;

   Speed of wave  = 18000 x   0.03  = 540m/s

Other Questions
At a point on the ground 15ft from the base of a tree, the distance to the top of the tree is 1 ft more than 2 times the height of the tree. Find the height of the tree. the domestic environment is composed of all the uncontrollable forces originatin in the that surround and influence the life and development of the firm now well look at what happens when we take the average of four normal draws (sample size is 4), and do that 100 times (number of trials is 100), so we get 100 means of four normals. first consider the theoretical quantities. question 6: for the sampling distribution of the mean of four standard normals, what are its theoretical mean and its standard deviation? a researcher wants to conduct a secondary analysis using a centers for disease control (cdc) database of prostate cancer patients that was collected by the agency. the researcher was not part of the original database creation and the database was originally created to monitor public health and not for research purposes. the database is publicly available. the database does not include any identifiers. consent from the patients is not required because If aspartate was linked to amino acids lysine, tyrosine, and serine, would this tetrapeptide be which of thefollowing?AmphipathicHydrophobicCannot be determined from information givenHydrophilic Find the slope of a line that passes through (4.5,3.5) and (9.5,5.5) M = what is the main purpose of this passage? a to support insurance claims against teens who get into accidentsto support insurance claims against teens who get into accidents b to entertain teens with stories of safe driversto entertain teens with stories of safe drivers c to convince readers to support raising the driving ageto convince readers to support raising the driving age d to warn older drivers to be careful when they drive which two partitions do you typically create at minimum during a fedora linux installation? (choose two answers.) Two spheres are made of the same metal and have the same radius, but one is hollow and the other is solid. The spheres are taken through the same temperature increase. Which sphere expands more?. Which field of earth science would be involved in studying the surface features of Jupiter's moons? Ted is a freshman attending a 4-year college. He has been approved for an $8.000 subsidized federal loan at 4.29% for 10 years. How much will the U.S. Department ofEducation subsidize in interest costs during his 4.5-year non-payment period? An item costs $480 before tax, and the sales tax is $14.40.Find the sales tax rate. Write your answer as a percentage. Charlie, Beth, and Miguel all babysit kids in their neighborhood. The table shows the number of hours and amount each of them earn last night. If each person babysits for five hours next weekend, which person will earn the most money? Use a coordinate plane if needed to solve. what are the STRUCTURAL weaknesses of the articles of confederation? Ay-Jiuan can buy 12 songs for $10, or shecan pay $0.85 per song. Which option has the lesser price per song? a client with cirrhosis of the liver and ascites has been taking chlorothiazide, a thiazide diuretic. why did the provider add spironolactone to the clients medication regimen? when we speak and listen in a way that preserves the important differences that make each of us who we are, we are respecting . a.rhetorical principles b.plurality of democracy c.none of these choices. d.all of these choices. e.unity of democracy What volume of a 0.35 M NaCl solution would contain 23.0 grams of NaCl? remember the difference: cross-domain few-shot semantic segmentation via meta-memory fine-tune transfer Find the equation of the line with slope m=- 3 that contains the point (9, - 15) Use fractions in your response, not decimals