Answer:
I think it's choice C because if we route it below the ground the surface will remain dry wild underground will be wet which will be good for soil and its fertility I think that's the answer
Which statement about the atomic nucleus is correct? a. The nucleus is made of protons and neutrons and has a negative charge. b. The nucleus is made of protons and neutrons and has a positive charge. c. The nucleus is made of electrons and has a positive charge. d. The nucleus is made of electrons and has a negative charge. Please select the best answer from the choices provided A B C D
Answer:
The answer is B
Explanation:
The nucleus of an atom is made up of neutrons and protons since neutrons are neutral and hold no charge while proton hold a positive charge so overall nucleus is positively charged.
The nucleus of the atom has been consisted of neutral neutrons and positive protons. The nucleus has been positively charged. Thus, option B is correct.
The atoms have been the smallest unit of matter. The determination of the structure of atoms has been revealed with several studies.
The atoms have been found to be consist of electrons, protons, and neutrons as subatomic particles. The electrons have been the lightest unit of the atom having negligible mass.
The electrons have been the negatively charged bodies revolving around the nucleus. The central part of the atom has been the nucleus consisting of neutrons and protons.
The neutrons are the neutral atoms, while protons are the positively charged atoms. Thus, the nucleus has been the positively charged entity of the atom. Thus, option B is correct.
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5. A shopping mall wanted to determine whether the more expensive
"Tough Stuff" floor wax was better than the cheaper "Steel Seal" floor wax
at protecting its floor tiles against scratches. One liter of each brand of
floor wax was applied to test sections of the main hall of the mall. The test
sections were all the same size and were covered with the same kind of
tiles. After 3 weeks, the number of scratches in each of the test sections
was counted to observe the wax's effectiveness. Identify Control Group
Answer:
Control group:
Test section covered with the "Steel Seal" floor wax
Explanation:
In a scientific experiment, the control group is the standard group to which comparison is made, to determine the effect of the experimental agent on the test subjects. In this example, the Steal Seal floor wax is the standard wax being used, and the experimenter wants to see if the "Tough Stuff" wax is better, hence after the treatment with the Tough Stuff wax, the number of scratches observed is compared with the standard wax area and the difference determines if it is a better waxing agent or not.
7th GRADE SCIENCE QUESTION FIRST PERSON MARKED BRAINLIIEST
What device converts mechanical energy into electrical energy?
Answer: Electric Generator is a device which converts mechanical energy into electrical energy.
It works by the principle of Electromagnetic induction.
Electromagnetic induction is defined as the production of electric current due to the change in magnetic field. The number or turns or coils present inside the generator is directly proportional to the amount of voltage produced. Electromagnetic induction was first discovered by Micheal Faraday.
Explanation:
HURRY NEED ANSER NOW!!!
A machine makes work easier by____
A. Multiplying the force exerted
B. Maintaining the distance over which the force is exerted
C. Adding the forces exerted
D. Dividing the force exerted
Answer:
your answer would be C.
Explanation:
Machines make work easier by increasing the amount of force that is applied, increasing the distance over which the force is applied, or changing the direction in which the force is applied. sorry if im wrong.
Part B: Short Answer - Answer the following questions
6. Why are the elements so important?
7. The transition metal Cobalt has an atomic number of 27 and an atomic mass of approximately 59
AMU. How many neutrons does it have? Show all your calculations for full marks.
I
28
tv
I need help fast 50 points
Answer:
7. 32neutrons
Explanation:
mass number is equal to number of protons plus the number of neutrons
the atomic number is also known as the number of protons
therefore 59-27=32
compared to nonmetals, metals tend to have-
A. higher ionization energy
B. an acidic form of oxide
C. lower electronegativity
D. higher electron shielding
Answer:
C. Lower Electronegativity
Periodic table is divided into metals, non metals, semiconductors and noble gases on the basis of electron gain or loss. Metals have lower electronegativity. The correct options is option C.
What is metal?Metals are those elements which is hard, conduct electricity, ductile, lustrous and malleable.
Lets take properties
1.Since metals have free electrons that's why they can conduct electricity.
2. Since atoms in metals are very closely packed in a definite crystal so these are solid. Metals are not brittle that is, it can not be broken down easily
3.Metals do not react with water easily.
4.Metals are denser than water hence sink in water.
5. Metals are meant to give electrons so these have low ionization energy. and lower electronegativity.
6. Metals form basic form of oxide.
7. Metals have lower electron shielding.
Therefore the correct options is option C.
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Changing a chemical property of a substance
never alters its chemical composition.
always alters its chemical composition.
will only alter its chemical composition if the change is small.
will only alter its chemical composition if the change is large.
Answer:
A chemical change in a substances always alters the chemical composition.
Explanation:
Molecules always are combined to create a new substance, otherwise it would only be a physical change and the substance would have still had the same molecular design.
if the frisbee represents light, what does the fence represent?
Answer: vacuum
Explanation: light travels as a wave but unlike sound waves or water it doesn’t need any matter to carry it energy along. This means that light can travel through a vacuum which means a completely airless space the wall is vacuum:) hope this helps
1. What do you call the process in which one tectonic plate move under the
other?
Answer: an earthquake
Explanation:
Why are milk powder tins and salmon tins coated with tin (Sn) metal? Give reasons based on the reactivity series of the metals.
Urgent!!
How would you describe the mood in the section nose to the ground?
Answer:
The mood of the section “Nose to the Ground” could be described as suspenseful.
Explanation:
The variables for this experiment include mass, volume, and the materials in the various balls, as well as their densities. Part I, you will be comparing a table tennis ball and a golf ball. Use the drop-down menus to complete the sentences and identify the independent and dependent variables. In Part I, the independent variable, the one that is intentionally manipulated, is .
In Part I, the dependent variable, the one that you measure the response in, is .
Answer: A. Mass B. Density
Explanation:
Answer:
A, mass. B density
Explanation:
because yes, and yes. also the person above me is correct have a good day
mixing chocolate syrup into milk
picking up a paper clip with a magnet
Mass or state
Which of the following answers can cause food infection?
A. Salmonella in chicken
B. Pesticides on lettuce
C. Mercury in tuna
D. Metal shavings in canned corn
Among all the given options, the correct option is option D that is metal shavings in canned corn. Eating infected food can result in food poisoning.
What is food infection?Eating infected food can result in food poisoning, known colloquially as a foodborne sickness. At every stage of processing or manufacture, harmful organisms including bacteria and viruses may contaminate the food. If food is handled or prepared improperly, poisoning can also happen at home.
Food contamination can occur at any point during the planting, harvesting, or storage of raw materials as well as during cooking or other food preparation processes. Cross-contamination, or the movement of hazardous organisms through one surface to another, is another possibility. Metal shavings in canned corn can cause food infection.
Therefore, the correct option is option D.
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NEED HELP PLEASE ANSWER Which of the following statements is true?
Rocks usually absorb heat evenly.
Water expands when it freezes.
Caves are formed through oxidation.
The movement of sediment is called weathering.
Answer:
water expands when it freezes
Explanation:
Answer:
B. Water expands when it freezes.
Explanation:
How much heat must be absorbed by 375 grams of water to raise its temperature by 25° C? (specific heat of water = 4.184 J/gC)
Answer:
The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs.
Explanation:
The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs.
A sample of nitrogen has a volume of 880. mL and a pressure of 720. torr. What pressure will change the volume to
.672L if the temperature is held constant?
Answer:
943torr
Explanation:
according to Boyles law
P1V1=P2V2
however V2 = .672L
convert into mL
.672× 1000
672mL
880(720)=672P2
633600= 672P2
633600÷672=P2
943.0torr=P2
An actual measurement of a sample is 3.5m. The measured value is 2.5m.
Percent error? *
URGENT
Answer:
The answer is 28.57 %Explanation:
The percentage error of a certain measurement can be found by using the formula
[tex]P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ [/tex]
actual measurement = 3.5 m
error = 3.5 - 2.5 = 1
We have
[tex]p(\%) = \frac{1}{3.5} \times 100 \\ = 28.571428...[/tex]
We have the final answer as
28.57 %Hope this helps you
How many atoms are in 3.5 moles of carbon?
Answer:
Explanation: There are 5.418⋅1024 atoms in 3 moles of Carbon Dioxide. Explanation: 1 Mole is 6.02⋅1023 molecules. Therefore 3 Moles of Carbon ...
As in 1 mole there are 6.022 * 10^23 atoms.
So in 3.5 mole of carbon there are 21.077 * 10^23 atoms.
What do we should know about mole concept?
The mole concept is a convenient way to describe a substance's volume. The numerical magnitude and the units in which it is expressed are the two components of any measurement. When a ball's mass is measured to be 2 kilograms, for instance, the magnitude is "2" and the unit is "kilogram."Even one gram of a pure element contains a significant number of atoms when dealing with particles at the atomic (or molecular) level. The mole concept is frequently used in this context. It focuses primarily on the "mole" measurement, which represents a count of a very large number of particles.A mole is the amount of a substance that contains precisely 6.02214076 * 10^23 "elementary entities" of the given substance, as defined in the field of chemistry.Every substance has the same number of atoms or other particles in a mole. The mole and an element's mass are related in the following ways. There are 6.02214076 * 10^23 carbon-12 atoms in one mole, giving it a mass of 12 grams. By definition, one mole of oxygen has the same number of atoms as one mole of carbon-12, but it weighs 15.999 grams. As a result, oxygen has more mass than carbon. Weights of molecules or formulas can be accounted for using this logic as well.
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When one atom is significantly more electronegative than another one
(difference > 1.7), a covalent bond between them is
If the electronegativity difference is more than 1.7, the bond will have an ionic character. If the electronegativity difference is between 0.4 and 1.7, the bond will have a polar covalent character. Lastly, if the electronegativity difference is less than 0.4, the bond will have a nonpolar covalent character.
Which energy transformations best describe a wildfire?
а
b
ОООО
Kinetic Energy -> Thermal Energy ->Chemical Potential Energy-> Light Energy
Chemical Potential Energy -> Thermal Energy -> Light Energy
Chemical Potential Energy -> Thermal Energy -> Light Energy -> Sound Energy
Thermal Energy -> Chemical Potential Energy->Light Energy -> Sound Energy
C с
Answer:
3
Explanation:
Ok so now I have to wright an essay about microorganisms what should I wright it about?
Answer:
Maybe Write about the meaning and causes?
Explanation:
:)
The chemical formula for glucose, a type of sugar, is C6 H12 06. Which statement is true about glucose?
1) Glucose is a compound because it's made from more than 1 element 2) Glucose is an element because it's made up from more than one kind of atom. 3) Glucose is an element because it can be separated. 4) glucose is a compound because is made of protons, neutrons and electrons
The statement which is true about glucose is (1) Glucose is a compound because it's made from more than 1 element. Hence the correct option is (1)
What is an Element ?An element made entirely of one species of atoms, or an element, has a specific number of protons in its nucleus.
Chemical elements, in contrast to chemical compounds, cannot be reduced by any chemical process into simpler molecules.
Three substances make up glucose: carbon, hydrogen, and oxygen. They are set at a fixed ratio of 1:2:1.
Covalent bonds, in which two atoms share bonding valence electrons in one or more bonds, are used to bind these atoms together.
Therefore, The statement which is true about glucose is (1) Glucose is a compound because it's made from more than 1 element. Hence the correct option is (1)
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You go out to lunch one day and order a giant steak and a baked potato with sour cream. You ask for the nutritional information, and find out your lunch contains 51 g of carbohydrates (assume no fiber), 29 g of protein, and 40 g of fat. Does this lunch have a balanced energy ratio? If not, what macronutrient should be increased?
Answer:
This lunch does not yet have a balanced energy ratio. Carbohydrate ought to be increased to the stipulated 45 to 65 percent.
Explanation:
Total mass = 51 + 29 + 40 =120g
The percentage of calories from each is;
Carbohydrate - 51/120 * 100 = 42.5 %
Protein - 29/120 * 100 = 24.17 %
Fat - 40/120 * 100 = 33.33 %
According to the National Academy of Sciences, a balanced energy ratio for an adult diet should contain;
10 to 35 percent of calories from protein, 20 to 35 percent from fat, and 45 to 65 percent from carbohydrates.Hence this lunch does not yet have a balanced energy ratio. Carbohydrate ought to be increased to the stipulated 45 to 65 percent.
Which structure captures and stores the sun's energy in plant cells?
Choose the correct answer.
O chloroplast
O mitochondria
O Golgi apparatus
endoplasmic reticulum
Pls hurry
Answer:
chloroplast
Explanation:
Submit your Evidence
What are the double and half amounts for each ingredient?
(Will mark brainiest if explained decently)
The double ingredients are the ones that have a whole number in them (for example 2,3,4,5, or even 1)
The half ingredients are the ones that have fractions in them (1/2, 3/4)
When dissolved beryllium chloride reacts with dissolved silver nitrate in water, aqueous beryllium nitrate and silver chloride powder are made . What’s the equation . I will give Brainliest for the right answer
Answer:
Please mark as Brainliest!!!!!!!
Explanation:
Were new substances created from old substances during electrolysis? Explain.
3 Polystyrene foam is less dense than water. Molly measured the volume of a
small block of foam by submerging it in water in a measuring cylinder.
The pictures show her results.
Forces in action
cm3
240
-220
cm3
240
220
200
180
160
140
-120
100
cm3
240
-220
-200
-180
160
140
120
100
80
60
200
180
160
140
120
100
80
60
water
80
160
40
20
steel
40
20
40
20
polystyrene
Answer:
The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs.
A solution can be made when a-
A.solid dissolves in a liquid
B.solid dissolves in a solid
C. liquids dissolve in liquids
D. all of the above
Answer:
c. liqids dissolve in a liquid.
Explanation:
Answer:
I think it's D
Explanation: