Answers
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 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
This is because heating the water causes the water to change states. For example, liquid water turns into water vapor.
explanation: heating the water causes it to change
As distance increases, gravitational force________
Answers
Answer:
Decreases
Explanation:
Answer:
Decreases
ExplanatIon:
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
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?
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.
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 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
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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Which example is NOT a part of the electromagnetic spectrum?
Group of answer choices
electricity
microwaves
violet light
radio waves
Answers
A 10cm3 sample of copper has a density of 897g/cm3. What is the mass of the sample?
Answers
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]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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what is the line that joins northen and southren hemisphere of the earth is called a
Answers
The line is called equator.
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
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.
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
GIVING BRAINLIEST PLEASE HELP!!
-if you answer correctly ill give you brainliest which will give you 25pts-
Answers
Answer:
mechanic and potential?
Explanation:
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
doing work alawyas means blank energy
Answers
Answer:
Transferring energy
Explanation:
Doing work always mean Transferring energy.
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.
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
How many cups of water should you drink in a day?
Answers
Answer:
about 2.7liters for women and 3.7liters for men
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 ☺️
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.
find ways you can change the total energy
Answers
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.
What is a Satellite in your own words??
(Science)
Answers
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:)
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
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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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;
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The time lag between education of a muscle cell and the beginning of contraction is known as the ______
Answers
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: