please help me please ​

Please Help Me Please

Answers

Answer 1

Answer #1:

Physical.

Explanation:

The only thing mentioned to change is the color. Nothing about the gas in general is changing

Answer #2:

Chemical.

Explanation:

The fact this interacted with another element to completely turn something else rather than just being that color makes this a chemical change.

Answer #3:

Physical

Explanation:

Well, how does an element's density have to do anything with a chemical change?

Answer #4:

Chemical.

Explanation:

Fire/heat is involved, and it makes it change states.


Related Questions

Which changes in surface water movement are likely
to occur when vegetation is removed from the side of
a hill?
A) infiltration decreases and runoff decreases
B) infiltration decreases and runoff increases
C) infiltration increases and runoff decreases
D) infiltration increases and runoff increases

Answers

Answer:

infiltration decreases and runoff increase

Explanation:

The changes in surface water movement which is likely to occur when vegetation is removed from the side of a hill is infiltration decreases and runoff increases.

What is surface overflow?

Surface overflow is the flow of water which take place on the surface of the ground. The extra water due to rain or flood arises on the ground or at the surface, flows in the nearby lacks or ponds.

Now if the vegetation is removed, great amount of water started to come from the hills. The result of it, more water started to overflow on the land of the surface. This way the runoff increases.

Infiltration is the way by which the ground level water enters into the soil of the earth.

Now, if the vegetation is removed, a lot of amounts of water started to come from the hills. This excess amount of water does not enter in to the soil of the earth.

The changes in surface water movement which is likely to occur when vegetation is removed from the side of a hill is infiltration decreases and runoff increases.

Learn more about the Infiltration here;

https://brainly.com/question/15362770

Clay bricks are used as building materials in construction. Do some research on specific heat capacities of brick, concrete, stone etc. and advise on what this means for society.

Answers

Answer:

It means it is the main building block material for society.

Specific heat is the amount of heat energy that causes a unit increase in temperature by required to be added to the unit mass of the substance. It can be measured by the heat capacity of a particular substance. The unit of specific heat is joule/kg/kelvin.

Material Specific heat capacity Thermal conductivity

Clay                1000                                       0.60

stone              1000                                      1.8

brick               800                                       0.73

concrete        1000                                       1.13

Advice on what this means for society:

Thermal interaction in between indoor and outdoor environments regulated by wall components.The structural and thermal properties influence the behavior of building and fabricating the bricks, stone and others. Clay Bricks are durable, and natural of stable value. A modern building must comply with numerous ecological and economic demands.

Learn more about specific heats:

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doing work alawyas means blank energy​

Answers

Answer:

Transferring energy

Explanation:

Doing work always mean Transferring energy.

I really really really need help with this one question, if answered correctly or attempted will get brainliest :)

For the circuit shown with a 12.0 V battery, what are the currents through each resistor and the voltage drops across each resistor?

Answers

Answer:

i belive it is R 24

Explanation:

may i be marked brainliest?

Which is an example of the cycling of matter from one sphere to another?
A a puddle of water evaporating and rising into the atmosphere
B animals obtaining energy from plants
C heat energy from the sun warming the land
D heat energy from the sun warming the oceans

Answers

D) heat energy from the sun warming the oceans

This is because heating the water causes the water to change states. For example, liquid water turns into water vapor.
D) heat energy

explanation: heating the water causes it to change

In this system, ___________________ energy from the sunlight causes the solar panel to create ___________________ energy which flows into the incandescent light bulb. In the light bulb, the ___________________ energy is transformed into two different types of energy: ___________________ energy and ___________________ energy.

Answers

Answer:

solar, heat,heat, light

LITERALLY HELP IMBEGGING YOU GUYS ANYONE IM NEEED HELP

Answers

Explanation:

The energy of a photon is given by :

[tex]E=\dfrac{hc}{\lambda}[/tex]

Where

h is Planck's constant

c is the speed of light

[tex]\lambda[/tex] is wavelength

or

[tex]E=hf[/tex], f is the frequency

Energy is directly proportional to the frequency of an object.

The energy transported by a wave is directly proportional to the square of the amplitude.

The small piston of a hydraulic lift has an area of 0.20 m2. A car weighing 1200 N sits on a rack mounted on the large piston. The large piston has an area of 0.90 m2. What is the mechanical advantage of the hydraulic lift?

Answers

Answer:

4.5

Explanation:

Given the following

Weight of the car = 1200N (Load)

Let us get the effort by using the formula;

F1/A1 = F2/A2

Substitute the given values

1200/0.9 = F2/0.2

Cross multiply

0.9F2 = 1200 * 0.2

0.9F2 = 240

F2 = 240/0.9

F2 = 266.67N

Hence the effort is 266.67N

Mechanical Advntage = Load/Effort

MA = 1200/266.67

MA = 4.5

Hence he mechanical advantage of the hydraulic lift is 4.5

Mental health disorders may NOT affect...
O
A person's motivation levels
O
The ability to make decisions
о
A person's memory or ability to make new memories
A person's ability to breathe

Answers

In my opinion, mental health can affect all of these options. However, I think the answer this is looking for would be "A person's ability to breathe"

Mental health definitely affects motivation; and motivation affects mental health. Motivation is a driving force behind human behaviours; its absence can lead to mental illnesses such as depression. Often when someone is depressed, they lack the motivation to do things.

Mental health can affect decision making as well- for example, if someone has anxiety, decision-making can be harder. Anxiety disrupts the decision-making regions in the prefrontal cortex.

Mental health can also affect memory- Depression has been linked to memory problems, such as forgetfulness. Depression is associated with short-term memory loss. Stress and anxiety can also lead to poor memory.

I would say that panic attacks can inhibit a person from breathing, but considering the options I would say that's the best one. Breathing is more of a physical thing, not associated with the brain or mental condition. So the answer is A person's ability to breathe.

A magnet can generate an electric current in a wire if the magnet is close enough to the wire and if the magnet is also
A.)strong
B.)weak.
C.)at rest.
D.)in motion.

Answers

Answer:a stro

Explanation:

A magnet can generate an electric current in a wire if the magnet is close enough to the wire and if the magnet is also in motion. The correct answer is D) in motion.

What is electromagnetic induction?

When a magnetic field is in motion with respect to a conductor, such as a wire, it induces an electric current in the wire. This is because the changing magnetic field creates a changing electric field around the wire, which causes electrons to flow. The induced electric current is proportional to the rate of change of the magnetic field. This consequence is known as electromagnetic induction.

The strength of the magnetic field does affect the magnitude of the induced electric current, but the magnetic field must be in motion in order to generate an electric current.

A weak magnetic field can still generate an electric current in a wire if it is in motion with respect to the wire.

If a magnetic field is at rest, it will not induce an electric current in a wire. The magnetic field must be in motion in order to generate an electric current.

Thus, the correct answer is D) in motion.

Learn more about electromagnetic induction here:

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describe the motion of the box as a result of the forces acting on it.
(picture cuts off right and left measurements- right is 100N, and left is 50N.)​

Answers

The box will move with net force =100-50=50N to the right side

A load uses a current of 5.0 A when it is attached to a 20 V source. What is the resistance of the load?

Answers

Answer: 4.0 ohm

Explanation:

what are the objectives of the tourist for visiting Nepal write in points​

Answers

Answer:

The objectives of the tourist for visiting Nepal are .

It is naturally decorative .Highest mountain ️ of the world mt.everest is situated in Nepal .many rivers are there for rafting .different types of land and climate can be found .many historical , religious and cultural site are present here to visit .

hope it is helpful to you ☺️

In the process of photosynthesis, how do plants obtain the water, carbon dioxide, and energy they use for this process?

Answers

Answer:

They get it from the air and soil. They also take energy from the sun.

Explanation:

During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil.

What is a Satellite in your own words??
(Science)

Answers

A satellite is a moon, planet or machine that orbits a planet or star.

Answer:

What I think a Satellite is...

Explanation:

A satellite may be a moon, planet or machine that circles a planet or star. For example, Earth could be a satellite since it circles the sun. Moreover, the moon may be a obsequious since it circles Soil. As a rule, the word "satellite" refers to a machine that's propelled into space and moves around Earth or another planet in space.

Please.rate.me.a.five:)

Given equal time periods, which statement about radioactive waste is correct?
A. Radioactive decay and nuclear fission always generate the same amount of waste.
B. Nuclear fusion generates less radioactive waste than radioactive decay does.
C. Nuclear fusion generates less radioactive waste than nuclear fission does.
D. Nuclear fission generates less radioactive waste than radioactive decay does.

Answers

I think the answer is C

The time lag between education of a muscle cell and the beginning of contraction is known as the ______

Answers

I think it will be muscle contraction. Hope this helps! Mark brainly please!

How many cups of water should you drink in a day?

Answers

Answer:

about 2.7liters for women and 3.7liters for men

Explanation:

After rubbing a rubber brush on wool, Gilbert is able to use the brush to pick up small strips of paper. What causes the paper to be attracted to the brush?
A.) gravity
B.)electric current
C.) static electricity
D.)magnetism

Answers

Static electricity because when you rub something against a surface, there is friction aka static electricity.

After rubbing the a rubber brush on the wool it gets a charge acquired by the passage of electrons. The electrons from the wools escapes to the brush and thus the paper get attracted to electrons in the brush. Hence, option B is correct.

What is electric current?

Electric current is the passage of electrons from the negative end to positive end of a  potential difference.

When a an object is rubbed on a conducting material it gets some electrons into it.  When this material comes in contact with another object which have random distribution of charges will attracts the electrons by its positive end.

The rubber brush gets negatively charged on rubbing.  Paper have positive and negative charges in random. When it comes in contact with the negatively charged brush the electrons in the paper repelled away.

The positive charges thus accumulates on the other end of the paper and attracted to the brush. This is an example of static current. Hence option B is correct.

To find more about static current, refer the link below:

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A periodic wave with wavelength
- 2 m has frequency f = 4 Hz.
What is the wave's speed?

Answers

Answer:

-8m/s

Explanation:

v=wavelength*f=-2*4=-8m/s

Describe the three methods of thermal energy transfer and provide a sketch that depicts each:
Conduction:
Convection:
Radiation:

Answers

Answer:

a)the process by which heat or electricity is directly transmitted through the material of a substance when there is a difference of temperature

b)the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat

c)radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium.

As distance increases, gravitational force________

Answers

Answer:

Decreases

Explanation:

Answer:

Decreases

ExplanatIon:

what is the line that joins northen and southren hemisphere of the earth is called a

Answers

The line is called equator.

GIVING BRAINLIEST PLEASE HELP!!
-if you answer correctly ill give you brainliest which will give you 25pts-

Answers

Answer:

mechanic and potential?

Explanation:

I comment so u can give her brainliest

Select the correct answer.

Which situation will have the highest resistance?

А. long wire and high temperature

B. short wire and high temperature

C. long wire and cold temperature

D. short wire and low temperature

Answers

C it’s c hope you have a good one

find ways you can change the total energy

Answers

Either make the hill taller to increase it or make the kill lower to decrease the total energy

Answer:

The ways to change the total energy are to either make the hill taller to increase it or make the hill lower to decrease the total energy.

Explanation:

The total mechanical energy of a system is the sum of the total kinetic energy and total potential energy.

The half-life of Cs-137 is 30.2 years. If the initial mass of the sample is 1.00 kg, how much will remain after 151 years?
A.There will be 0.062 kg left after 151 years.
B.There will be 2.000 kg left after 151 years.
C.There will be 0.031 kg left after 151 years.
D.There will be 0.500 kg left after 151 years.

Answers

Answer:can someone help

Explanation:

A 10cm3 sample of copper has a density of 897g/cm3. What is the mass of the sample?

Answers

Question:-

A 10cm³ sample of copper has a density of 897g/cm³. What is the mass of the sample ?

Answer:-

Given:-

Density of sample of copper is 897g/cm³.

Volume of sample of copper is 10cm³.

To Find:-

The mass of the sample.

Solution:-

We know,

[tex] { \boxed{\bf{\rm \red {Mass \: = \: Density \: × \: Volume}}}} [/tex]

So, Mass = 897g/cm³ × 10cm³

Mass = 8970 g

The mass of the sample is 8970 g. [Answer]

Which example is NOT a part of the electromagnetic spectrum?
Group of answer choices

electricity

microwaves

violet light

radio waves

Answers

Electricity is not apart of it

Find the Y component of 35m/s at 57 degrees from the X-axis.

Answers

Answer:

35m/s[57o].

X = 35*Cos57 =

Y = 35*sin7 =Explanation:

learn man but there u go

The Y component of the velocity 35 m/s is 29.35 m/s.

What is a projectile?

A projectile can be defined as an object upon which experiences only force is gravity. The projectile covers the path with a parabolic trajectory because of the effect of gravity. No horizontal forces act upon projectiles which causes no horizontal acceleration.

The velocity of a projectile is divided into two components one is the horizontal component and the other is the vertical component.

If the projectile makes an angle θ with the X- axis.

The vertical component of the velocity, Vy = Vsinθ

The horizontal component of the velocity, Vx = Vcosθ

Given the angle θ with the X- axis = 57°

The velocity of the projectile V = 35 m/s

Then the vertical or Y component of the velocity, Vy = Vsinθ =

Y component = 35× sin 57°

Vy = 29.35 m/s

Learn more about the projectile's velocity components, here:

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