I have been trying to do number 2 and I just don’t know what the answer is if you can help me thank you so mush

Explanation:

chemical changes

>produce new substances w/ different chemical structure/ properties

> thermal energy can be used to BREAK bonds (endothermic)

>thermal energy can be transferred to a chem rxn to help form new products (endothermic)

> heat can be released by an exothermic chemical reaction (excess energy- the total energy used to break bonds is less than energy released in forming new bonds)

physical changes

>does not result in new substances (typically changes in state- solid, liquid, gas)

> thermal energy can be transferred to EVAPORATE water (add thermal E... water (liquid) to steam (gas)) or FREEZE water (remove thermal E... water (liquid) to ice (solid))

Answer:

The final speed of the second bicycle is (v·√2)/2

Explanation:

The mass of the given bicycle = m

The amount of work required to move the bicycle from rest to speed v = 50 J

The final speed of the first bicycle = v

The mass of the second bicycle = 2m

Therefore, from conservation of energy, we have;

Work required by the first bicycle = Kinetic energy gained by the bicycle

The kinetic energy = 1/2·m·v²

∴ Energy required by the first bicycle = 50 J = 1/2·m·v²

Given that the same amount of work is performed on the second bicycle, we have;

Work performed on the second bicycle = 50 J = kinetic energy of second bicycle = 1/2·(2·m)·v₂²

Also, given that 50 J = 1/2·m·v², we have;

Work performed on the second bicycle = 50 J = 1/2·m·v²= 1/2·(2·m)·v₂²

1/2·m·v²= 1/2·(2·m)·v₂²

m·v² = 2·m·v₂²

v² = 2·v₂²

v₂ = √(v²/2) = v/√2 = (v·√2)/2

v₂ = (v·√2)/2

The final speed of the second bicycle = v₂ = (v·√2)/2.

Answer:

Staples, Bestbuy, Maybe Homedepot

Explanation:

Answer:

find the mechanical pencil on amazon

Explanation:

amazon has everything!

HOPETHIS HELPS!

brailiest? please....

Answer:

A person or object may have stored energy because of its....

potential energy

A person or object may have stored energy because of its position and the energy is called potential energy.

The relative positions of different system components determine the potential energy, which is stored energy. When a spring is compressed or stretched, its potential energy increases.

If a steel ball is raised above the ground as opposed to falling to the ground, it has more potential energy. It is capable of performing more work when raised.

Potential energy is a characteristic of systems rather than of particular bodies or particles; for instance, the system made up of Earth and the elevated ball has more potential energy as they become further apart.

In systems having components whose forces on one another rely on their configuration, or relative positions to one another, potential energy is generated.

Learn more about potential energy here:

https://brainly.com/question/24284560

#SPJ6

Answer:

One arm row: Latissmus Dorsi (Lat)

Dumbell flys: Shoulders

Machine back press: pectorals

Push downs: Triceps

Explanation:

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Given:

Momentum of the dog (p) = 120.5 kg m/s

Speed of the dog (v) = 5 m/s

To Find:

Mass of the dog (m)

Concept/Theory:

[tex] \underline{\underline{ \bf{\Large{Momentum}}}}[/tex]

Answer:

By using equation of momentum, we get:

[tex] \rm \longrightarrow m = \dfrac{p}{v} \\ \\ \rm \longrightarrow m = \dfrac{120.5}{5} \\ \\ \rm \longrightarrow m = 24.1 \: kg[/tex]

[tex] \therefore [/tex] Mass of the dog (m) = 24.1 kg

Answer:

No!!

Explanation:  I think the government shouldn't get involved with limiting population!! i think that as long as you can care and supply your family it is your choice how larger your family is!

Answer: Try A. 110 Hz

Explanation:

Answer:

i got 110 Hz..

Explanation:

The force corresponds to the question mark in the given figure is known as Gravity. Hence, option (C) is correct.

The given problem is based on the concept of equilibrium of forces. The forces that causes the net motion of an object to be zero, is known as equilibrium of force.

Thus, we can conclude that the force corresponds to the question mark in the given figure is known as Gravity. Hence, option (C) is correct.

Learn more about the gravity here:

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Answer:

less than its diameter at the poles

hope this helps. have a great day! :)

Answer:

today's species evolved from those of the past.

Explanation:

By comparing fossils of a specie from long ago to those of today, we can conclude that today's species evolved from those of the past.

Answer:

An interaction between electricity and magnetism produces an electromagnet, while a permanent magnet induces the paper clip's magnetic field.

Explanation:

A p e x :)

Answer:32

(im not sure if this is right but im just gonna try and explain.)

Explanation: If Larry and the two other people are both pulling at the same force, it wouldn't be able to move.

Answer:

Friction produces unnecessary heat leading to the wastage of energy. The force of friction acts in the opposite direction of motion, so friction slows down the motion of moving objects. Forest fires are caused due to the friction between tree branches. However, friction can also cause problems in a car. Friction between moving engine parts increases their temperature and causes the parts to wear down. Friction can be both harmful and helpful, so it may be necessary to decrease or increase friction.

Answer:

Friction had many disadvantages and these are the har,s of friction too.

Explanation:

Disadvantages of friction are mainly forest fires, decreasing life expectancy of vehicles, damages many machines, generates heat, wear and tear, wastage of force/energy, etc. When two things in a forest rub against each other through an amount of force, friction will be present and it will cause a spark. This spark will be continued into a fire because of other materials like wood in the forest causing a forest fire. Secondly, vehicles work through moving many internal machines in them; this again includes friction and friction can damage the machines so to prevent it ppl grease the machines. decreasing life of vehicles is just a larger view of damaging the machines as this disadvantage of friction can be used anywhere. Wastage of force/ energy because when we roll a ball on a surface we have to put force on the ball to make it move forward but because friction moves in the opposite direction energy/force will be wasted there. Generating heat and wear & tear are some factors of friction which is also a harm.

Answer:

960J

Explanation:

Given parameters:

Force  = 120N

Distance = 8m

Unknown:

Work required  = ?

Solution:

The work done by a body is the force applied to move a body in a specific direction.

 Work done  = Force x distance

Insert the parameters and solve;

  Work done  = 120  x  8  = 960J

Answer:

the answer choice is B

Explanation:

as we move from left to right , the atomic size decreases due to higher number of protons in the nucleus, which are able to attract the electrons more strongly. and so the electronegativity and  electron affinity increases for the same reason. the nuclear charge increase due to more protons , and without an increase in inner electrons , there is less shielding effect. so effective nuclear charge increases.

Answer: B. electronegativity

Explanation: Electronegativity generally increases as you move of the periodic table and as you move to the right. All the other answers listed decrease as you move up a column of the periodic table.

Answer:

potential energy

Explanation:

by the sun

Answer:

B. closed

Explanation:

Charges flow through a closed path called a circuit. Current flows because negatively charged particles are attracted to positively charged particles at the other end of the circuit.

Hope this helped, Have a Wonderful Day!!

Answer:

Ok I’m not pretty sure but I think it’s C but look for more answers first before you put C  because I don’t want you to get it wrong. :)

Explanation:

Answer:

i think the answer is The nonmetal takes up more space.

Explanation:

i hope this helps

Answer:

yes

Explanation: if temperature is higher the reactants have more kinetic energy make the chemical reaction faster

Answer:

increasing the temperature will cause chemical changes to occur faster

Decreasing the temperature, causes the particle to lose energy which causes them to move around less and slower

Answer:

127.6 m

Explanation:

Given that  Zane has an elastic water balloon launcher that can fire balloons at an angle of [38.0o] from the surface of the ground. If the initial velocity is 25.0 m/s,

The horizontal initial velocity will be:

U = 25cos38

U = 19.7 m/s

To find how far away are the balloons are from the launcher when they hit the level ground again, we will first calculate the total time spent before using the range formula

To calculate the total time, let's use the formula below:

T = 2U/g

T = (2 × 25)/9.8

T = 50/9.8

T = 5.1s

Range = UT

Since horizontal acceleration = 0

Range = 25 × 5.1

Range = 127.55 m

Therefore, the balloons are approximately 127.6m away from the launcher when they hit the level ground again

Answer:

true

Explanation:

is an important component of physical fitness and has many positive effects on the body

Answer:

It's True

Developing flexibility helps yourself:

For more question about the topic click/copy the link below:

https://brainly.ph/question/1672452

https://brainly.ph/question/171899

Answer:

When matter changes from one state to another, it either absorbs energy—as when chocolate melts—or loses energy. For example, if you were to place the melted chocolate in a refrigerator, it would lose energy to the cold air inside the refrigerator. As a result, the liquid chocolate would change to a solid again.

Explanation:

hope it helps u

Meeeeeeeee............!

Answer:

m = 664.821 kg

General Formulas and Concepts:

Physics

p = mv

Explanation:

Step 1: Define variables

m = unknown

p = 3723 kg * m/s

v = 5.6 m/s

Step 2: Find mass

3723 kg * m/s = m(5.6 m/s)

m = 664.821 kg

Answer:

yes I agree to his opion cause freedom is important just like everyones rights and if you give up hope i think he means if you give up hope, hope is lost you kind lost everything else

Explanation:

hope it helps a little :)