Answer:
CLEANER
Explanation:
Independent variable is the variable in an experiment that is changed or manipulated by the experimenter in order to bring about a measurable response.
In this question, Marie notices that the current cleaner she is using on her shower is not cutting through the hard water build-up that has accumulated. She decides to purchase 3 other cleaners to see if one of them will do a better job of cutting through the stains. The CLEANERS being changed in this experiment is the INDEPENDENT VARIABLE.
Critical thinking : Place an unmagnetized piece of iron in a magnetic field (eg iron filings near a magnet). Why is it attracted to the magnet?
Magnets attract iron due to the influence of their magnetic field upon the iron. Before a piece of iron enters the magnet, the polarization of the irons atoms is random. When exposed to the magnetic field, the atoms begin to align their electrons with the flow of the magnetic field, which makes the iron magnetized as well. This, in turn, creates an attraction between the two magnetized objects. This is why a piece of iron that is exposed to a magnet becomes magnetic for some time afterward.
what would happen if the
attractive forces between all of the particles
of matter on Earth were equal?
The magnitude of attractive forces between particles that compose matter determine the state of matter. Hence, if all particles of matter on earth have equal attractive forces, only a single state of matter (solid, liquid or gas) will exist on earth.
Matter exists in three states;
SolidLiquidGasIn solids, there exists the greatest magnitude of attractive forces between particles.
There are weaker inter-molecular attractive forces between liquid particles. However, inter molecular attractive forces are almost non-existent in gases.
The reason for the existence of different states of matter on earth is difference in magnitude of inter molecular attractive forces in each state of matter.
If all particles of matter possess equal attractive forces, only one state of matter will be found on earth; either solid, liquid or gas.
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when an atom loses electrons, what does it become?
Which of the following most completely describes a redox reaction?
O A. A chemical decomposition reaction
B. A hydrocarbon combustion reaction
O c. A reaction resulting in electron sharing
D. An oxidation and reduction reaction
Answer:
D.
Explanation:
Because i just copied the person above tbh, and i also got it right in the quiz
To solve such this we must know the concept of redox reaction. Therefore, the correct option is option D that is an oxidation and reduction reaction.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
Redox reaction is a chemical reaction where oxidation and reduction takes place simultaneously. Oxidation is loss of electrons and reduction is gain of electrons. The electron transfer from oxidant to reductant.
Therefore, the correct option is option D that is an oxidation and reduction reaction.
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Which statement describes how chemical formulas, such as H2O, represent compounds?
They show the types of molecules that make up an atom.
They show the elements that make up a compound.
They show the three-dimensional shape of a molecule.
They show the types of bonds that exist between elements.
Answer: B. They show the elements that make up a compound
Explanation:
Answer:
B
Explanation:
Which process creates new cells from existing cells?
A. Cell division
B.Cell limitation
C.Cell addition
D.No answer text provided.
Answer:
the answer is cell division
Explanation:
cell division is the process by which a present cell divides into two or more daughter cells.
the process can also be called cell cycle
4x+15-3x+10= help me please
Answer:
7x+5
Explanation:
4x+15-3x+10
-10 -10
--------------------
4x+5-3x
+3x. +3x
---------------------
7x+5
PLEASE HELP ASAP I EILL GIVE 100 POINTS!!! Kristy is on the track team. She runs the one kilometer race by going four times around the circular track. How does Kristy velocity change.
A. Her velocity changes countinually since her direction constantly changes
B. Her velocity depends on only on how she paces herself during the race
C. Her velocity is the same as her speed
D. Her speed changes at the same rate as velocity
Answer:A
Explanation:
PLEASE HELPPP :[
When a chemical change occurs a new substance is created. Harvey put hamburgers on his barbecue, and they cooked. He left fruit out on the counter and they started to rot.
What evidence about chemical changes can Harvey use to support the examples in his experiment?
A.The chemical changes occurred because the chemicals changed.
B. The chemical changes occurred because there was a change in light energy.
C. The fruit and the hamburgers were affected by an increase in heat energy.
D. The fruit and the hamburgers were affected by a decrease in heat energy.
Answer:
C. The fruit and the hamburgers were affected by an increase in heat energy.
Explanation:
One claim Harvey can use to support the examples from his experiment is that the hamburgers and fruits were affected by an increase in the heat energy.
This chemical change is one that is solely driven. This action Harvey is carrying out is cookingWhen meals are cooked, the raw substances undergoes chemical change via the action of heat.Answer:
btw it's not c
Explanation:
a fruit rotting or infected is a chemical reaction therefore,its close to d
how can animal fossils help us understand the earth
Answer:
Some animals and plant are only known to us as fossils. hope this helps. and have a nice day:)
What is the formula for nitrogen monoxide?
O N203
O NO
O N₂O,
O None of the answers are correct
Susie cooked sausages on a barbecue. Fat and water in the sausages changed state. which two changes of state occur during this process? a. Fat melted b. Water evaporated
Answer:
The options a and b are correct
Explanation:
This options provided to the question are the answers to the question. But for clarification. When the fat melts, the change of state that occurs here is from solid to liquid (which is called melting) while the change of state that occurs when the water evaporated is from liquid to gas (which is called evaporation).
Use the decoder to get the lock combination
Answer:
u didnt attach an image or anything so this is quite confusing.
Explanation:
??
Answer:
Okay
Explanation:
calculate the weight of 5 atoms of Mg.
Answer:
2.0179701e-22
Explanation:
what is hard water and what causes hardness of water
Answer:
hard water is ice
Explanation:
ice is formed as the water temperature decreases and then it freezes
How many electrons are gained in the half-reaction 02, + electrons — 202-
Answer:
2
Explanation:
A
Answer: 4!!!
Explanation: j took the quiz!!!
Would it be possible for electrons in the 2p orbitals to be inside the 2s orbital?
(Please explain)
Answer:
Yes
Explanation:
You can have 2s and have part of the 2p of the row in the p section.
The #2 discovery was:
a
heliocentrism
0
E=MCP
c
heredity
general relativity
d
Answer:
bug vfyjovcduvcu Harris's
What can you infer about particle's size?
Answer:
particle size analysis, particle size measurement, or simply particle sizing is the collective name of the technical procedures, or laboratory techniques which determines the size range, and/or the average, or mean size of the particles in a powder or liquid sample.
Explanation:
Which describes how rubbing fur on a rubber rod makes the rod negatively charged. Select one: A. Electrons move from the fur to the rubber rod. B. Electrons move from the rubber rod to the fur. C. Protons move from the rubber rod to the fur.
Answer:
A
Explanation:
Rubbing fur on a rubber rod results in the rod becoming negatively charged as a result of the movement of electrons from the fur to the rubber rod.
The process is called triboelectric charging. When the two substances are rubbed together, their atoms come into close proximity with each other and their electron clouds interact with the fur losing electrons to the rubber due to the fact that the atoms of the rubber have higher affinities for electrons than the atoms of the fur. Hence, the fur becomes positively charged while the rubber becomes negatively charged.
is aluminum Pure or Impure?
Answer:
The aluminium is impure
A sample of which element could have a volume of 1.5 cubic centimeters (cm3) and a mass of 7.5 grams (g)?
Answer:
5 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{7.5}{1.5} \\ [/tex]
We have the final answer as
5 g/cm³Hope this helps you
HELP ME PLEASEEEEEEEEEEEEEEE
(I really dont know the subject i just know science)
Answer:
B
Explanation:
weight , w= mg where m is the mass of the object (unit is kg ) and g is the gravitational force acting on the object ( unit is m/s^2 )
hope it helps
How much energy would be required to heat 10.0 g of water at 0 degrees C to 100 degrees C,and change it into steam at 100 degrees C
Answer:
Q = 4180 J
Explanation:
Given data:
Mass of water = 10.0 g
Initial temperature = 0°C
Final temperature = 100°C
Heat required = ?
Solution:
Specific heat capacity of water is 4.18 j/g.°C.
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = 100°C - 0°C
ΔT = 100°C
Q = 10.0 g ×4.18 j/g.°C × 100°C
Q = 4180 J
The independent variable and dependent and constant
Answer:
Explanation:
independent-longer wire
dependent-bulbs being brighter
constants-lamp brand and so on
In the article, Invasion of the Periodical Cicadas, why do scienctists believe that cicadas only reproduce every 13 or 17 years? Explain your answer with evidence from the text.
Hi, you've asked an incomplete question. However, I assumed you are referring to the article found on the Scientific American website.
Explanation:
Remember, according to that article we are told that scientists notice that these insects have a long nymphal (immature form before becoming adults) stage, one that can last up to 13 to 17 years on the ground before they leave the ground looking for mating partners.
Because it is only after mating occurs at this point that their eggs are laid, that is why scientists believe that cicadas only reproduce every 13 or 17 years.
does formaldehyde classified as a pure substance or a mixture
Answer:
pure substance
Explanation:
it is a naturally occuring compound
Answer:
Formaldehyde is a mixed substance. It is made up of Carbon, 2 Hydrogen, and an Oxygen.
Explanation:
The formula is CH2O
The formula for one molecule of sucrose is shown below.
C12H22011
How many atoms in all are in one molecule of sucrose?
Answer:
45
Explanation:
There are 12 Carbons
There are 22 Hydrogens
There are 11 Oxygens.
I think the answer is either 0 or 45. But the wording is very sloppy. It is not really atoms that are present. There are ions.
Go with 45 but hold your nose when writing your answer.
How do you determine if you have a covalent bond?
Answer:
If the electronegativity difference (usually called ΔEN) is less than 0.5, then the bond is nonpolar covalent. If the ΔEN is between 0.5 and 1.6, the bond is considered polar covalent. If the ΔEN is greater than 2.0, then the bond is ionic.
Explanation:
Hope this helped :)
Which of the following is the best way to model the process of weathering?
Using a fan on a pile of sand causing the sand to move into a pile in a new location.
Using a ramp to dump sand at the bottom causing the sand to pile up.
Using a watering can sprinkle water onto sand causing the sand to move to a new location.
Filling a glass bottle with water and allowing it to freeze causing the bottle to break.
The best model of weathering is using a fan on a pile of sand causing the sand to move into a pile in a new location.
Weathering refers to the gradual breakdown of a rock due to the agents of denudation. The agents of denudation could be physical, chemical or biological.
The breakdown of rocks leads to the formation of soil. The closest model to the weathering of rock is using a fan on a pile of sand causing the sand to move into a pile in a new location.
The pile represents the rock which is being broken down as the fan blows the pile and it settles on a new location.
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