Which example shows an endothermic reaction?


reactants + thermal energy --> products

products + thermal energy --> reactants

products --> reactants + thermal energy

reactants --> products + thermal energy

please help

Answers

Answer 1

Answer:

reactants --> products + thermal energy

Explanation:

Heat is absorbed in endothermic reaction.


Related Questions

look at picture, need to know net force, whether they are balanced or unbalanced and whether they are accelerated or not accelerated!

Answers

Answer:

1) 100 ...unb. and accelerate

2) 7...unb. and accelerate

calculate the mass fo an unknown solid if its density is 1.6 g/cm^3 and it has a length of 7.5 cm, a height of 12.5 cm, and a width of 2.2 cm

Answers

Answer:

Density = Mass / Volume

Mass = Density * volume = 1.6 gm/cm^3 * (7.5 * 12.5 * 2.2) cm^3

Mass = 1.6 gm/cm^3 * (206 cm^3) = 330 gm

How are particles in liquids, solids, and gases the same? How are they different?

Answers

Answer:

Gases, liquids and solids are all made up of atoms, molecules, and/or ions, but the behaviors of these particles differ in the three phases. ... gas are well separated with no regular arrangement. liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern.

Explanation:

#CARRYONLEARNING

. A small toy car having 300 grams of mass and going straight with an initial velocity of 13 m/s. When the toy car collides with an obstacle, a resistive force of 4 N acts upon it. The speed of the toy car reduced and reached 8 m/s. Draw its free body diagram and then find the time for the toy car to be into rest position?

Answers

The free-body diagram is attached in the image below. The time for the toy car to be in rest position is 0.6 s

From the given information:

The mass of the toy car = 300 g = 0.3 kgThe initial velocity (u) of the car = 13 m/sThe resistive force F_r acting on the car = 4 NThe speed of the car (v) = 8 m/s

A force is regarded as a push that causes an alteration in motion of an object within a specified distance. It is usually expressed by the formula:

Force = mass × acceleration

acceleration = Force/massacceleration = (4 / 0.3) m/s²acceleration = 13.33 m/s²

Using the first equation of motion for the time to bring the car to rest from it reduced speed of 8 m/s;

v' = v + at

since the final speed to bring the car in rest position is (0), then:

0 = 8 -  13.33(t)

13.33(t) = 8

t = 8/13.33

t = 0.6 seconds

Learn more about the equation of motion here:

https://brainly.com/question/19959461?referrer=searchResults

Determine the force required to move a block if the coefficient of static friction of one block and the floor is 0.35 and the coefficient of the static friction between 2 boxes is 0.25

Answers

Answer:

32.5

Explanation:

Choose the normal force acting between the object and the ground. Let's assume a normal force of 250 N .

Determine the friction coefficient. ...

Multiply these values by each other: (250 N) * 0.13 = 32.5 N .

You just found the force of friction!

What is the correct description for an element?

A. Elements are made of two or more different types of atoms, chemically joined together

B. Elements are made up of one type of atom only

C. Elements are made of two or more types of atoms, not chemically joined

Answers

Answer:

B

Explanation:

Elements are made up of one type of atom only

Which type of electromagnetic radiation is useful in communications technology?
A. X-rays
B. visible light
C. radio waves
D. ultraviolet radiation

Answers

Radio waves: they are present in radios and also walkie-talkies

An athlete spins in a circle and throws a 1.6-kg discus. The radius of the discus's path is 1.0 m, and he releases it with an angular speed of 15.0 rad/s. The athlete spins for a total of 1.2 s before releasing the discus.
– What is the tangential speed of the discus at release?
– What is the centripetal acceleration of the discus?
– What is the centripetal force on the discus?

giving Brainliest for full and proper answers! thank you for anyone who tries to help/explain :)

Answers

(a) The tangential speed of the discus at the release is 15 m/s.

(b) The centripetal acceleration of the discus is 225 m/s².

(c) The centripetal force on the discus is 360 N.

The given parameters;

mass of the discus, m = 1.6 kgradius of the path, r = 1 mangular speed, ω = 15 rad/stime of motion, t = 1.2 s

The tangential speed of the discus at the release is calculated as follows;

[tex]v = \omega r\\\\v = 15 \ rad/s \ \times 1 \ m\\\\v = 15 \ m/s[/tex]

The centripetal acceleration of the discus is calculated as follows;

[tex]a_c = \frac{v^2}{r} \\\\a_c = \frac{15^2}{1} \\\\a _c = 225 \ m/s^2[/tex]

The centripetal force on the discus is calculated as follows;

[tex]F_c = ma_c\\\\F_c = 1.6 \times 225\\\\F_c = 360 \ N[/tex]

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Make a
claim about whether a mixture could be made
up of only elements and no compounds.
Summarize evidence to support the claim and
explain your reasoning.

Answers

Answer:

Yes, a mixture can be made up of just elements and no compounds. The elements never experiance a chemical interaction and stay only in physical contact with each other.

BRAILIEST PLS I NEED LEVEL UP!

Based on the chemical equation, use the drop-down menu to choose the coefficients that will balance the chemical equation:

Answers

Answer:

its in this order 2,1,1

Explanation:

trust me bro

Answer:

221 is the actual answer

Explanation:

dont trust the person above me


2. A roller coaster moves 85 m horizontally, then travels 45 m at an angle of
30.0° above the horizontal. What is its displacement from its starting
point? Use graphical techniques.

Answers

The displacement is 126m at 10.3 degrees above the horizontial (x-axis).

(Here you go sorry if this didn’t help)

the weight of a box having of 100 kg is __n

Answers

Answer:

mom                                                                                                

Explanation:

Watch the video and make a ninja star. Once you have made a ninja star, 5 Point Ninja Star. Explain the energy transfer in the ninja star once it has been assembled.
PLEASE HELP​

Answers

There is no video attached lol maybe put the transcript in the comments if there is a person explaining it

Answer:

kinetic energy because it is movement

Explanation:

You place a small sphere with a net charge of 5 space x space 10 to the power of negative 6 end exponent space C at one corner of a square that measures 5 m on each side. What is the magnitude of the electric field at the opposite corner of the square?

900 N/C


9,000 N/C


450 N/C


4,500 N/C​

Answers

450n/c

(Sorry if this didn’t help)

3 points
A science teacher is going to make a Newton's Cradle using students on
swings. *
A
B C
Which of the following statements is true?

Answers

Answer:

When a ball on one end of the cradle is pulled away from the others and then released, it strikes the next ball in the cradle, which remains.

So it will be D

Explanation: Hope this helps :)

helppppppp meeee please

Answers

Answer:

B.X substance = sulfur dioxide, Y substances = sodium carbonate

Explanation:

sorry for wrong because that is my predicted

How do you find out the missing masses in a balloon

Answers

Answer:

How do you find out the missing masses in a balloon?

Well, actually you can't find the missing masses in a balloon. Why?

Because the mass of the mass of balloon, it can't see the mass of it, it only see if it the balloon is deflated or inflated.

Explanation:

Hope it helps

#LetsStudy

NEED HELP!!! ANSWER THESE 5 QUESTIONS FOR 25 POINTS!!!! PLEASE ANSWER!! I WILL GIVE YOU BRAINEST

1. Jerome explains to his doctor that because he spends a lot of time at his desk, he makes sure that his chair supports good posture. But when he is home, he spends his time on an old, squishy couch that offers very little support. He figures that since he spends most of his time at work, he does not need to worry about his home furniture as much. How would Jerome’s doctor MOST likely reply?
A.
Jerome’s thinking is correct since he spends most of his time at work.
B.
Jerome should bring his chair from work home with him on the weekend.
C.
If Jerome’s standing posture is good, he does not have to worry about his seated posture.
D.
Sitting properly is important in all contexts, so Jerome should consider his seating at home.

2. Guillermo has decided that he wants to be healthier, so he starts jogging. He has been at it for a week, but he is getting frustrated because he cannot run very far without getting out of breath. He is beginning to think that this is not a good exercise for him since he is not very good at it. What BEST explains why Guillermo is struggling?
A.
He probably does not have good form when he is exercising.
B.
He likely has heart or lung problems that he was not aware of.
C.
He does not have much endurance since he is new to exercise.
D.
He is just not good at jogging and needs to try something else.

3. Which is the BEST example of the kind of mechanics that are studied in sports biometrics?
A.
the average attendance at a sporting event
B.
how a new sport becomes popular in a community
C.
the movement of the wrist when hitting a tennis ball
D.
the median height of the most successful hockey goalies

4. Ewan had a resting heart rate of about 110. What does this indicate?
A.
His heart rate is perfectly average.
B.
He probably has a high metabolism.
C.
He needs to work on raising his resting heart rate.
D.
His heart rate is high and could indicate a problem.

5. Why is acceptance an important part of building a healthy lifestyle?
A.
Exercise will probably not change much in your life.
B.
Healthy lifestyles often create a lot of disappointment.
C.
If you understand your limitations, you are less likely to be frustrated.
D.
Finding the energy to exercise can be hard, so you should limit your goals.

PLEASE NO LINKS

Answers

1. D
2. C
3. C
4. D
5. D
•••••••••••••••••••••••••••••••••••••••••••••••••
I really hope this helps! These answers are the most reasonable.

an amusement park ride has two identical carriages that revolve around the center of the ride’s axle, as shown in the figure. both carts travel at a constant tangential speed at all points along the circular path. at what position is the total mechanical energy of the cart-cart-earth system at its maximum value?

Answers

The principle of conservation of energy allows to find the result for the mechanical energy of the system is:

Mechanical energy is conserved at all points, therefore at all points it has the same value.

Mechanical energy is defined by the sum of the kinetic energy and the potential energies.

            Em = K + U

In the principle of energy conservation, it establishes that energy cannot be created or destroyed, it is only transformed, in the case of no friction, mechanized energy is conserved at all points.

They indicate that the system is rotating, which is why it is subjected to a force that expends its energy in changing the direction of the speed to keep the system in rotation, so the speed of the system remains constant.

          Em = K = ½ I w²

Consequently, using the principle of conservation of energy we can find the result for the mechanical energy of the system is:

Mechanical energy is conserved at all points, therefore at all points it has the same value.

Learn more here: brainly.com/question/1517221

an unbalanced force of 965 N causes an object to accelerate at 54.5 m/s^2. what is the mass of the object

Answers

Answer:

[tex]F=ma \\ 965 = m(54.5) \\ m = \frac{965}{54.5} \\ m = 17.7kg[/tex]

a wave is recalling with a speed of 5m/s for 7 seconds. How far has the wave travelled?

Answers

Answer:

35m

Explanation:

Take the speed of 5m/s and multiply that by 7 seconds. You get 35m

Explain how bats use ultrasound to catch a prey​

Answers

Answer:

Ultrasound is used by bats to navigate (move) and catch prey. Ultrasonic squeaks are produced by bats. These squeaks ponder prey and then return to the bat's ear. This provides bats with information about the location of prey, allowing them to catch it.

Explanation:

Convert 9/4 hours into minutes

Answers

Am guessing;

9/4 × 60/1 =135

A plane is flying through the sky at a constant speed. The thrust of the aeroplane (making it go forwards) is 100N. Air resistance is also acting on the plane. What must the resultant (overall) force be on the plane?

A: 0N
B: 50N
C: 100N
D: 150N

Answers

Answer: 0N

Explanation: Hope this helps :)

last time i wrote the wrong answer for the wrong problem :)

For the constant speed, the resultant force on the plane is 0N. So, the correct option is A.

What is Force?

A force is defined as the parameter that can change the momentum of an object that can cause an object with mass to change its velocity, i.e., to accelerate. Force can also be described intuitively as a push or pull where force has both magnitude and direction, making it a vector quantity.

For above given information, the plane is moving at a constant speed. According to Newton's first law, the net external force on the aircraft due to the thrust generated by the propeller must be zero and air resistance is equal and in opposite directions to produce zero net force.

Thus, for the constant speed, the resultant force on the plane is 0N. So, the correct option is A.

Learn more about Force, here:

https://brainly.com/question/26115859

#SPJ2

What is the power of a crane that lifts a 120 N load 14 m in 3.6 s?

Answers

Answer:

1000n

Explanation:

hop it helps

Answer:

467 watts

Explanation:

Power is = to work/time. Work is = to force (N) times distance from starting point. So first, calculate work. 120N x14m , which is equal to 1680 joules. so then plug it into your power formula. 1680 joules/ 3.6 seconds= 466.666...7, which rounds to 467 watts.

The symbols used in language have no direct relationship between the word and the object or idea.

Answers

Answer:

The symbols used in language have no direct relationship between the word and the object or idea. Underextension in language occurs when a child incorrectly uses one word to describe other objects or actions that are similar to that word. ... Morphemes are the smallest distinctive sound units in a language.

Explanation:

Answer:

True

Explanation:

e2021

What is the net force needed to accelerate a 1 kg textbook with an acceleration of
4 m/s2

Answers

Answer:

4 N

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question

mass = 1 kg

acceleration = 4 m/s²

We have

force = 1 × 4 = 4

We have the final answer as

4 N

Hope this helps you

When might people use data tables and graphs in their everyday lives? How are these uses similar to and different from the way in which scientists use these same tools?
Do you think scientists need data tables and graphs to do their work?
Which fields of science do you think might use data tables and graphs more than others?

Answers

Answer:

hahaha bisa aja ente gan di download di sini adalah salah satu

Pythagoras theorem is used to find the resultant force when angle between 2 forces is _________ degrees. asap

0
45
90
180

Answers

[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]

Pythagoras theorem is used to find the resultant force when angle between 2 forces is 90 degrees ~

A roller is pushed with a force of 100 N along its handle, which is at an angle of 60 degrees with the horizontal. Find the work done in moving it through 20 m?

Answers

Answer:

1 kJ

Explanation:

By definition of work, [tex]W = \vec F \cdot \vec x = |\vec F| |\vec x| cos\angle Fx[/tex]. Let's replace the values: [tex]W = 100N\cdot 20m \cdot cos 60 = 1000 J[/tex]

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