Some chemical reactions release energy. Others store energy. What important chemical reaction stores energy?

Answers

Answer 1
Chemical energy energy stored in the bonds of chemical compounds. Chemical energy maybe realized during a chemical reaction of in the form of heat

Related Questions

There are several ways to model a compound. One type of model is shown.

What is the chemical formula for the molecule represented by the model?


CHO

C4H9O2

C4H8O

C3H8O2

Answers

Answer:

What is the chemical formula for the molecule represented by the model?

[tex] →CHO\\ →C_4H_9O_2✓ \\→C_4H_8O \\ →C_3H_8O_2[/tex]

2) C4H9O2 is the right answer.
C4h9o2

Your welcome

Good luck

how much energy must be absorbed by water with a mass of 0.5kg in order to raise the tempature from 30c to 65c

Answers

Answer:

62760J

Explanation:

Given parameters:

Mass  = 0.5kg  = 500g

Initial temperature  = 30°C

Final temperature  = 65°C

Unknown:

How much energy is absorbed by the water  = ?

Solution:

To solve this problem, we use the expression below:

  H  = m C Δt

  H =  m  x C x (t₂ - t₁ )

m is the mass

C is the specific heat  = 4.184J/g°C

t₂ is the final temperature

t₁ is the initial temperature

So;

              H  = 500 x 4.184 x (65  - 30) = 62760J

A force of 6.0 Newton’s is applied to a block at rest on a horizontal frictionless surface over a 7.0 meter span. How much energy is gained by the block.

Answers

Answer:

42J

Explanation:

Given parameters:

Force applied  = 6N

Distance moved  = 7m

Unknown:

Amount of energy gained by the block  = ?

Solution:

The amount of energy gained by the block is the same as the work done on the block.

The work done is the force applied to move the block through a distance;

 Energy gained  = force x distance  = 6 x 7  = 42J

A spring has a constant of 875 N/m. What hanging mass will cause this spring to stretch 4.5 m?

Answers

Answer:

8) A hanging 7.5 kg object stretches a spring 1.1 m. What is the spring constant? 1 . 1 66. 82 NIMO 9) A spring has a constant of 875 N/m. What hanging mass will cause this spring to stretch 4.5 m? Iouliply then divide 875 X 4. 2- - (4 04. 7919) 10) A spring with a spring constant of 25 N/m is stretched 65 cm. What was the force used? 11) A 25 N force stretches a spring 280 cm. What was the spring constant? 12) A 75 N force stretches a spring 175 cm. What was the proportionality constant? 8) 66.82 N/m 9) 401.79 kg 10) 16.25 N 11) 8.93 N/m 12) 42.86 N/m

Explanation:

A spring has a constant of 875 N/m. and the mass which will cause this spring to stretch 4.5 meters is 401.78 kg.

What is Spring constant?

The spring constant is a characteristic of a spring which is defined as the ratio of the force affecting the spring to the displacement which is caused by that force. The SI unit of spring constant is N.m⁻¹ (Newton per meter).

The spring constant is:

F = -k/ x

where, k is the spring constant

F denotes the force,

and x denotes the change in the length of the spring.

k = 875N/m

x = 4.5m

We know that

Kx = mg

m= kx/ g

m = 875 × 4.5/ 9.8

m = 401.78kg

Therefore, the mass which will cause this spring to stretch 4.5 meters is 401.78 kg.

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Which part of the electromagnetic spectrum is typically used to make images based on the temperatures of objects?

X-rays
radio waves
infrared light
visible light

Answers

Answer:

Which part of the electromagnetic spectrum is typically used to make images based on the temperatures of objects?

X-rays

radio waves

infrared light<<<----- CORRECT

visible light

Explanation:

Edge 2021

Infrared light is typically used to make images based on the temperatures of objects.

What is meant by electromagnetic spectrum?

The range of all EM radiation arranged from high to low frequency (short to long wavelength) according to their frequency or wavelength. is known as the electromagnetic spectrum (EM).

Here,

Similar to visible light, X-rays are a type of electromagnetic radiation. X-rays have a higher energy than light, on the other hand, and can penetrate most materials, including the human body.

Images of inside body tissues and structures are produced using medical x-rays.

Electromagnetic energy in the infrared region of the spectrum can be seen by them. There is a relationship between an object's temperature and the electromagnetic radiation it releases since infrared radiation is strongly related to object temperature.

Hence,

Infrared light is typically used to make images based on the temperatures of objects.

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A stationary 10 kg object is located on a table near the surface of the earth. The coefficient of kinetic friction between the surfaces is 0.2. A horizontal force of 40 N is applied to the object.

Answers

Answer:

2.04m/s²

Explanation:

Complete Question

A stationary 10 kg object is located on a table near the surface of the earth. The coefficient of kinetic friction between the surfaces is 0.2. A horizontal force of 40 N is applied to the object. Find the acceleration of the object.

According to Newtons second law;

\sum F_x = ma_x

F_m - F_f = ma_x

Fm is the applied force

Ff is the frictional force

m is the mass

a is the acceleration

Substitute the given values

40N - nmg = 10a

40 - 0.2(10)(9.8) = 10a

40 - 19.6 = 10a

20.4 = 10a

a = 20.4/10

a = 2.04m/s²

Hence the acceleration of the object is 2.04m/s²

f. It is easier to pull a lawn roller than to push it, why?​

Answers

Answer:

because you use more force to push than to pull (well it depends how heavy it is)

Explanation:

The tensions in the rope are 12 n and 10 n . What is the angular acceleration of the pulley?

Answers

Answer:

[tex]\mathbf{\alpha = 16.06 \ rad/s^2}[/tex]

Explanation:[tex]A \ frictionless \ pulley, \ whic h\ can \ be \ modeled \ as \ a \ 0.83 k g \ solid \ cylinder \ with \ a \ 0.30 \ m \ radius,[/tex]  [tex]\ has \ a \ rope \ going \ over \ it[/tex] [tex]The \ tensions \ in \ the \ rope \ are \[/tex] [tex]12 n \ and \ 10 n . \ What \ is \ the \ angular \ acceleration \ of \ the \ pulley?[/tex]

[tex]From \ the \ given \ information:[/tex]

[tex]The \ moment \ of \ inerti a \ of \ a \ solid \ cylinder[/tex] [tex]I = \dfrac{1}{2}mr^2[/tex]

[tex]I = \dfrac{1}{2}(0.83)(0.3)^2[/tex]

[tex]I = 0.03735 \ kg \ m^2[/tex]

[tex]The \ net \ torque = F_1(r) - F_2(r) \\ \\ = 12(0.3) - 10(0.3) \\ \\ = 0.6 \ N.m[/tex]

[tex]Torque (T) = moment \ of \inertia (I) \times angular \ acceleration ( \alpha)[/tex]

[tex]\alpha = \dfrac{T}{I}[/tex]

[tex]\alpha = \dfrac{0.6 \ Nm}{0.03735 \ kg \ m^2}[/tex]

[tex]\mathbf{\alpha = 16.06 \ rad/s^2}[/tex]

An elephant kicks a 2.5 kg rock that is initially at rest. The

net force on the rock varies with time as shown below.

What is the rock's change in momentum between 0 ms

and 20 ms?

Answers

0.20Answer:

Explanation:

A 1.4 kg coconut falls from rest out of a tree. The instant before it hits the ground, it has a velocity of 6.7 m/s. How high was the coconut initially?

Answers

Answer:

2.29m

Explanation:

Given parameters:

Mass of the coconut  = 1.4kg

Final velocity  = 6.7m/s

Initial velocity  = 0m/s

Unknown:

Height of the coconut initially  = ?

Solution:

To solve this problem, we use one of the kinematics equation. The one given below is the best one to use.

   V²  = U²  + 2gH

V is the final velocity

U is the initial velocity

g is the acceleration due to gravity

H is the height

 So;

            6.7²  = 0²   + (2 x 9.8 x h)

           44.89  = 19.6h

                   h  = 2.29m

Emily roller skates with a constant speed
of 8 miles per hour. How far can she travel
in 3 hours? D = SxT

Answers

Answer:

She can travel 24 miles in 3 hours.

What is Required for the energy of an object to change

Answers

If we want to accelerate an object, then we must apply a force. Applying a force requires us to do work. After work has been done, energy has been transferred to the object, and the object will be moving with a new constant speed.

Tafu is working with subatomic particles in the physics lab. a positron is traveling in a straight line down the particle accelerator. tafu models its position with the function p(t)= t2 t â 1 where t>1. in the limit calculations below, if you need to use -â or â, enter -infinity or infinity. (a) calculate the limit

Answers

Answer:

Infinity

Explanation:

When you have a limit approaching infinity one method you can use is to remember that the highest power dominants all of the other ones so when we have (t^2)/t-1 like in your problem, we see that t^2 has the highest power of 2 so if that's going to infinity and it's not being divided by any powers higher than it will just be inifinity.

We have that for the Question, it can be said that  in the limit calculations below, if you need to use -â or â, enter -infinity or infinity. the limit is

[tex]Lim_{t->\infty} p(t)= \infty[/tex]

From the question we are told

Tafu is working with subatomic particles in the physics lab. a positron is traveling in a straight line down the particle accelerator.

tafu models its position with the function

p(t)= t2 t â 1 where t>1.

in the limit calculations below, if you need to use -â or â, enter -infinity or infinity.

(a) calculate the limit

Generally the equation for the Question  is mathematically given as

[tex]p(t)=\frac{t^2}{t-1}\\\\Therefore\\\\For Lim_{\infty}\\\\We have\\\\ Lim_{t->\infty} p(t)= Lim_{t->\infty}\frac{t^2}{t-1}\\\\[/tex]

Since, the equivalent degree of numerator (t^2) is greater than that of the denominator

[tex]Lim_{t->\infty} p(t)= \infty[/tex]

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Can a solution be separated by filtration?​

Answers

Answer:

Filtration is a method for separating an insoluble solid from a liquid. When a mixture of sand and water is filtered: the sand stays behind in the filter paper (it becomes the residue ) the water passes through the filter paper (it becomes the filtrate )

Explanation:

Listo!

Filtration is a method for separating an insoluble solid from a liquid.

Which is a unit of momentum?

A) N-m/s
B) kg-m/s
C) kg-m/s2
D) N-m/s2


please hurry i need help asap, will mark brainliest

Answers

Answer:

unit of momentum is kgm/s2

The unit for momentum can be Newton-second (Ns). In the CGS system, if the mass is in grams and the velocity in centimeters per second, then the unit of momentum will be gram-centimeters per second (g⋅cm/s).

What is momentum ?

"Momentum, product of the mass of a particle and its velocity. Momentum is a vector quantity; i.e., it has both magnitude and direction. Isaac Newton's second law of motion states that the time rate of change of momentum is equal to the force acting on the particle. See Newton's laws of motion."

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1. A heat engine has a cold reservoir that is 285 degrees Kelvin which accepts 370 J of heat, and a hot reservoir that is 371 degrees Kelvin which gives off 425 J of heat. Calculate the maximum and actual efficiencies of this engine.


2. A system that has a total change in entropy of 675 J/K and has received 243 J of heat energy will be at what temperature?


3. Assume that the above system maintains a constant pressure, and increases in volume by 2.5 m 3 while doing this work. What is the pressure of the system?

Answers

I can't help with this one.

The maximum efficiency of the heat engine is 23%.

The actual efficiency of the heat engine is 13%.

The temperature of the system is 273.36 ⁰C.

The pressure of the system is 607.5 Pa.

The given parameters:

Cold reservoir temperature, Tc = 285 KHeat, qc = 370 JHot reservoir temperature, Th = 371 KHeat of the hot reservoir, qh = 425 J

The maximum efficiency of the heat engine is calculated as follows;

[tex]\eta = 1- \frac{T_c}{T_h} \\\\ \eta = 1 - \frac{285}{371} \\\\ \eta = 0.23\\\\ \eta = 23 \ \%[/tex]

The actual efficiency of the heat engine is calculated as follows;

[tex]\eta = 1 - \frac{q_c}{q_h} \\\\ \eta = 1 - \frac{370}{425} \\\\ \eta = 0.13\\\\ \eta = 13\ \%[/tex]

The temperature of the system is calculated as follows;

[tex]\Delta S = \frac{\Delta H}{T} \\\\ T = \frac{\Delta H}{\Delta S}\\\\ T = \frac{243}{675} \\\\ T = 0.36 \ K\\\\ T = 273.36 \ ^0C[/tex]

The pressure of the system is calculated as follows;

[tex]W = P \Delta V\\\\ P = \frac{W}{\Delta V} \\\\ P = \frac{243}{2.5} \\\\ P = 607.5 \ Pa[/tex]

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I’ll give brainliest and 10 points

Answers

Answer:

what's these its D okkkk

what are the rocky planets? theres more in the attachment
HELP ME PLS

Answers

Answer:

Explanation:

The rocky planets include Mercury, Venus, Earth, and Mars. they are made up of rocks and metals and have solid surfaces.They are the closest four planets to the Sun. The gas giants are  Neptune, Uranus, Saturn, and Jupiter. they are further from the sun and are in the outer part of the solar system. I hope this helps!

TRUE if the statement is correct and write FALSE if is not.


1. Adolescents can achieve their energy and nutrient requirements by eating a variety of foods daily.

2. Eating regular meals will keep the body fueled by energy needed for the day.

3. Too much sweets and dessert can aggravate skin problems like pimples.

4. The Food Pyramid will guide you on how many servings from each food group is recommended daily.

5. Due to your rapid growth and development at this stage, you have a lesser need for certain nutrients, such as

calcium, iron, protein, and energy foods.

Answers

Answer:

1. True

2. True

3. True

4. True

5. False

Explanation:

1. Indeed, many health experts often recommend that when children reach the age of adolescents (between ages 10 and 19) they should eat a variety of foods daily in other to have enough energy and nutrients needed for development.

2. Having regular meals (mornings, afternoon, and evenings) has for long been encouraged by medical professionals in other to provide the body its fuel.

3. Some skin problems have long been associated with too much consumption of sweets and desserts since these products often contain sugars, and excess processed sugar intake is said to increase acne and eczema.

4. Just as the name suggests, the food pyramid is a visual representation that contains how many servings from each food group in other be healthy.

5. This is false because throughout the growth stages of life it is essential to get the needed food nutrients such as  calcium, iron, protein, and energy foods.

Martha, a first-grade teacher, is worried that if doesn't stay In at work to grade papers her principal will think she is lazy She is also worried that if she stays late at work her partner will be angry. This of conflict is known as

Answers

The type of conflict Character vs self

Answer:

Character vs self

Explanation:

The reason is because Martha is thinking to much about the negative things and it is making her feel like she is fighting her own body for control.

What happens when stress builds up at faults?

A. Energy is absorbed
B. Rock can bend and break
C. Plates form on the lithosphere
D. earthquakes develop at earths surface

Answers

Answer:

The answer is D because when the faults move that is the tectonic plates moving. So earth quakes will be forming when the fault moves.

Explanation:

AB just took the test

How much power does an Ox pulling a plow 20 m cross a field, exerting 120J of work over a period of 15 s?​

Answers

Answer:

8W

Explanation:

Given parameters:

Distance covered  = 20m

Work done  = 120J

Time  = 15s

Unknown:

How much power does the Ox exerts  = ?

Solution:

Power is the rate at which work is being done

  Power  = [tex]\frac{Work done }{time}[/tex]  

 Power exerted by ox  = [tex]\frac{120}{15}[/tex]   = 8W

Most electricity comes from the burning of
A. Fossil fuels B. Trash C. Wood D. None of the above

Answers

Answer:

(A) Fossil Fuels

Answer:

Fossil Fuels

Explanation:

That’s what CK12 told me

How much thermal energy does it take to raise the temperature of 2.5 kg of
plastic from 15°C to 75°C? The specific heat of plastic is 2.60 kJ/(kg.°C)

Answers

Answer:

390kJ

Explanation:

HELP PLS MARKING BRANLIST 100 Pts TAKING TEST RN


A sprinter runs the 50 m dash in 5.6 seconds. What is the sprinter's speed?

280 m/s

0.11 m/s

44.4 m/s

8.93 m/s

Answers

I think it would be 8.93

Why is NEWTON'S First Law of Motion often called the LAW OF INERTIA?

Answers

Answer:

According to newtons first law of motion an object remains in its state of rest or motion in a straight line unless an external unbalanced forces acts upon it. This is the reason why Newtons first law of motion is often called the LAW OF INERTIA

Make a prediction that answers the question in the purpose:

“How does time affect the temperature of water?”

(Ex-“If we use a ramp, then the ball will roll faster down the ramp because gravity has more time to do work on the ball.”)



Im not good at these, please help quickly.

Answers

As heat always flows from a higher temperature to a lower temperature, this transfer can go both ways .When the air is cold, warm water will transfer energy to the air and cool off. ... If the air is hot, cold water will receive the energy and warm up.

Juan rides his horse with a constant
speed of 18 km/h. How far can he travel
in 1/2 hour?

Answers

Answer:

He traveled 9km

Explanation:

To do this problem you need to use the equation which is Speed= distance/time and this problem gives you the speed which is 18 km/h and it gives you the time 1/2 hour so you write the equation 18= d/ 1/2 which his distance is 9km

II. What examples can you find in your home that are examples of kinetic and potential energy (name two for each type
of energy)?
11. Kinetic:
12. Kinetic:
13. Potential
14. Potential:

Answers

Answer:

11. A door accelerating when pushing it.

12. A person sliding along the floor.

13. Water dropping from the faucet.

14. Courtains descending when loosening them.

Explanation:

For kinetic energy, any example that does not move horizontally will do. Something accelerating or decelerating is a good example (Ek=1/2mv^2, where v is velocity).

For potential energy try to think of things moving vertically. Potential energy comes from the height of an object (Ep=mgh, where h is height).

Notice that example 13 and 14 represent potential energy turning into kinetic energy, height becomes lower, so velocity increases.

difference between input work and output work with table​

Answers

Answer:

Explanation:

Input work is the work done on a machine as the input force acts through the input distance. ... Output work is the work done by a machine as the output force acts through the output distance. The machine does to the object to increase the output distance.

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