Answer:
company smokes
wastes (liquid and solid)
Which of the following uses electrical energy?
A washing machine
The sun
A plant
A cat
Answer:
★ B. A washing machine.
Explanation:
What's Electrical energy?
Electrical energy is energy derived from electric potential energy or kinetic energy. When used loosely, electrical energy refers to energy that has been converted from electric potential energy.
Describe how ultrasonic waves help ships navigate and how ultrasonic waves can be used for medical purposes
A fire that is burning wood will release water vapor and carbon dioxide
true or false?
Answer:
true.
Explanation:
PLEASE HELP ME ASAP!!!!!!!!!!!!!
What can lead to being curious and also lead to fascinating scientific investigations? a. Questions b. Answers c. Qualitative Measurements d. Quantitative Measurements
Answer:
Questions
Explanation:
The word "science" was obtained from the Latin word "Scire" which means "to know". Hence science is a systematic investigation into the nature of the universe.
Scientific investigations begin with asking questions about the universe. It is this curiosity to know about occurrences in the universe as well as how to solve problems in the universe that leads to fascinating scientific investigations and discoveries.
Microorganisms have a major role in maintaining soil biodiversity. They recycle nutrients in ecosystems and decompose organic matter in soil. Organic matter contains dead and living plant and animal materials. Microorganisms convert these materials into simpler compounds that maintain soil quality and help with plant growth.
Which solution could best help to restore or increase microorganisms and soil biodiversity?
A.
adding manure or compost to the soil
B.
spraying chemical weed-killers and fertilizers on the soil
C.
removing all ground-covering plants from the soil
D.
adding sewage containing synthetic materials to the soil
Answer:
A i think
Explanation:
The solution that could best help to restore or increase microorganisms and soil biodiversity is adding manure or compost to the soil.
What are microorganisms?A microorganism, or microbe, is an organism of microscopic size, which may exist in its single-celled form or as a colony of cells. The possible existence of unseen microbial life was suspected from ancient times, such as in Jain scriptures from sixth century BC India.
“Microorganisms are minute organisms that are invisible to the normal eye.” Microorganisms are so small that they can only be seen under a microscope. These include a huge range of organisms such as bacteria, viruses, fungi, algae, protozoa, etc.
Given options are-
A. adding manure or compost to the soil
B. spraying chemical weed-killers and fertilizers on the soil
C. removing all ground-covering plants from the soil
D. adding sewage containing synthetic materials to the soil
Therefore, The solution that could best help to restore or increase microorganisms and soil biodiversity is adding manure or compost to the soil.
Learn more about microorganisms here:
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Earth is currently 150 million km away from the Sun. If Earth was 200 million km away from the Sun, why would it no longer be able to support life?
Answer:
The temperature would be too cold
Explanation:
A sealed container is heated from 110K to 175K. The gas begins at a volume of 95L, what is the new volume of the gas upon heating?
Name the gases that mostly compose the atmosphere.
O Argon and Carbon Dioxide
O Oxygen and Carbon Dioxide
Oxygen and Nitrogen
Carbon Dioxide and Nitrogen
Explanation:
Oxygen and Nitrogen. is the correct pair.
What variables are used to calculate speed
S /\ Speed
mph, km/h, ft/s
Answer:
Calculating speed, distance and time
We can use formulas to model real-life situations. For example, the formula for calculating speed is speed = distance ÷ time. It is possible to calculate the speed, distance or time if you have the other two values.
Explanation:
PLEASE Answer asap! What characteristics are shared by all alkali metals and alkaline earth metals?
A. They conduct electricity very well
B. They are strong and shiny
C. They form alkaline solutions when mixed with water
D. They do not react with water at all
Answer:
C
Explanation:
Mostly all of them but most likely C
can alluminium sulphate or carbonate test the purity of water
Explanation:
When added to water, aluminum sulfate causes microscopic impurities to clump together into larger and larger particles. These clumps then settle to the bottom of the container and can be filtered out. This makes the water safer to drink
,
What is the average speed of a race car if it travelled a total of 500 miles in 3.5 hours
Answer:
speed = 142.8571 miles per hour OR 142.8571 mi/h
Explanation:
speed= [tex]\frac{distance}{time}[/tex]
distance = 500, time = 3.5hours or 210 minutes
speed= [tex]\frac{500}{210}[/tex] = 142.8571
hope this helps!!!!
2 Na + Cl2 --> 2 NaCl
What is the mole ratio of chlorine to sodium chloride?
Answer:
1 : 2 ratio
Explanation:
Chlorine has a coefficient of 1, and sodium chloride has a coefficient of 2.
Predict the shape of the molecule.
Answer: circle
Explanation:
How many chlorine atoms are there in 100 g of carbon tetrachloride
Answer:
1.566x10²⁴ atoms of Cl
Explanation:
In Carbon tetrachloride, CCl₄, you have 4 moles of Cl per mole of CCl₄. To solve this question we must find the moles of CCl₄ in order to find the moles of Cl. Using Avogadro's number we can solve the chlorine atoms:
Moles CCl₄: 153.82g/mol
100g * (1mol / 153.82g) = 0.65 moles CCl₄
Moles Cl:
0.65 moles CCl₄ * (4 moles Cl / 1mol CCl₄) = 2.6 moles Cl
Atoms Cl:
2.6 moles Cl * (6.022x10²³ atoms / mol) =
1.566x10²⁴ atoms of ClThe molarity of a solution that contains 28 g KOH (molar mass 56 g/mol) per 250 mL of solution is:
Lyle filled a glass bottle completely with water. He put the lid on tightly, then put the water in the freezer to cool it down quickly. Lyle forgot about his water until the next day. When Lyle took his bottle out of the freezer, all the water was frozen solid. The bottle had cracked in several places and was broken. If water in the ground acts like water in the bottle when it freezes, how does water in the ground affect layers of rock and soil
Answer:
The answer would be It breaks them up.
Explanation:
A material in which electrons are able to move easily or freely is a(n)
A none of these
В electric field
C insulator
D conductor
Answer:b
Explanation:
Inferring Relationships Most earthquakes take
place near tectonic plate boundaries. Based on the
hazard levels, where do you think a boundary between
two tectonic plates is bcated in the United States?
Answer:
california
Explanation:
What is the answer to this?
the answer is A.
the scientist used mud and vinegar to make a model of the volcano.
I need help with number 17 pls someone pls ???
Answer:
can you pls say what subject it is pls and thank u
Explanation:
Answer:
glass cup as it can trap oxygen from getting in and out meaning that the fire can't grow
Certain minerals exclude lead but not uranium from their crystal structure, so when the minerals form they have no lead, only uranium. As time goes on, the uranium decays to lead, so measuring the ratio of lead atoms to uranium atoms allows investigators to determine the ages of the minerals. If a sample of a mineral contains 3 atoms of 207Pb207Pb for every 1 atom of 235U235U, how many years ago was it formed
Answer:
The answer is "[tex]1.4 \ \bold{ billion-years}[/tex]".
Explanation:
Using formula:
[tex]\to N_{Now} = N_{orige}e^{\lambda t} \\\\[/tex]
[tex]\to[/tex] 1 U atom produces 1 Pb atom after decay.
[tex]\to[/tex] U's original numbers are now the sum of U counts and Pb counts.
[tex]\to N_U=(N_U+N_{pb})e^{\lambda Ut}[/tex]
[tex]\to 1 = (1+3) \ exp[(\frac{-\ln(2)}{t_{(half)}} \times t ]\\\\\to t = [\frac{\ln(4)}{\ln(2)}] \times t_{(half)}[/tex]
[tex]= 14 \times 10^8 \ \ years\\\\=1.4 \ billion \ \ years[/tex]
6) A student measures out 96.21 g of sulfur for an experiment. How many moles of Sulfur are in this
sample? (show your work!)
Atomic mass of Sulfur = 32g
32g of Sulfur is one mole.
1g of Sulfur is [tex] \frac{1}{32} moles [/tex]
96.21g of Sulfur is [tex] \frac{96.21}{32} moles=> 3moles(appx) [/tex]
Answer:
[tex]\boxed {\boxed {\sf 3 \ moles \ sulfur}}[/tex]
Explanation:
To convert from grams to moles, the molar mass is used. This value is the number of grams in 1 mole of a substance and it can be found on the Periodic Table. Look for Sulfur or S.
Sulfur: 32.07 g/molWe use this as a ratio.
[tex]\frac {32.07 \ g \ S}{1 \ mo;\l\ S }[/tex]
Multiply by the given number of grams.
[tex]96.21 \ g \ S*\frac {32.07 \ g \ S}{1 \ mo\l\ S }[/tex]
Flip the fraction so the grams of sulfur cancel out.
[tex]96.21 \ g \ S*\frac {1 \ mol \ S}{32.07 \ g \ S }[/tex]
[tex]96.21*\frac {1 \ mol \ S}{32.07 }[/tex]
[tex]\frac {96.21 \ mol \ S}{32.07 }= 3 \ mol \ S[/tex]
96.21 grams of sulfur is equal to 3 moles of sulfur.
7.(05.02 MC)
The speed of light in four different materials is shown below:
Material Speed of light in thousand miles per second
A
140
B
78
С
186
D
12
Which material is the most dense? (4 points)
Material A
Material B
Material C
Material D
Answer:
C
Explanation:
thats the answer!! HEHEHHEHHHHSJSKSSSSJS
Answer: B or A
Explanation: Everyone is saying C and i just took the test and it is not C
What is the poh of a solution with a ph of 1.30? PLZZ ANSWER
Answer:
12.70
Explanation:
how does dipping an iron bucket in Molten zinc protect it?
Answer:
It forms a barrier that prevents corrosive substances from reaching the underlying steel or iron. The zinc serves as a sacrificial anode so that even if the coating is scratched, the exposed steel will still be protected by the remaining zinc. The zinc protects its base metal by corroding before iron.
Explanation:
Answer:
It protects it from corrosion.
Explanation:
Zinc protects iron and steel from the relentless forces of corrosion. Galvanizing iron and steel by dipping them in molten zinc creates an alloy that can, in the right environmental conditions, protect the iron or steel beneath it for 100 years or more.
Your friend says, “chemical changes are caused by an input in energy. In physical changes, there is no transfer of energy” is your friend correct? Why or why not?
Answer: Your friend is incorrect.
Explanation: If we have an object or something that isn’t moving, (let’s say a notebook on a desk). If there is change, and the notebook moves, there is acceleration. Force = Mass times acceleration, f = m*a. There has to be a force, first of all. If you touched the notebook and moved it, some of your energy is transferred and now the notebook has kinetic energy. If our system is you and the notebook, the total energy doesn’t change. the energy is transferred, but doesn’t change. Your friend is not correct. Please give brainliest hope this helped!
Why is it necessary to know the temperature of the reactants and the products of a reaction in order to determine change in the Gibbs free energy of the reaction
Answer:
Free Energy (G) can either increase or decrease for a reaction when the temperature increases. It depends on the entropy (S) change. The change in a quantity is represented by the Greek letter delta. ... Hence, when the temperature increases the numeric value of the free energy becomes larger.
Explanation:
The change in Gibbs free energy (ΔG) of a chemical reaction depends on the initial and final states of the reactants and products, as well as on the temperature and pressure conditions of the reaction.
What is Gibb's free energy?The Gibbs free energy of a reaction tells us whether a reaction is spontaneous or not under given conditions, with negative ΔG values indicating a spontaneous reaction and positive ΔG values indicating a non-spontaneous reaction.
The temperature of the reactants and products is important in determining the Gibbs free energy change because the Gibbs free energy change is related to the enthalpy change (ΔH) and the entropy change (ΔS) of the reaction through the equation:
ΔG = ΔH - TΔS
where T is the temperature in Kelvin.
Thus, the temperature of the reactants and products must be known in order to calculate the Gibbs free energy change of a reaction accurately.
To learn more about the Gibb's free energy, follow the link:
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can someone pleaze help me
Answer:
I think its the last one
Explanation:
Super sorry if its incorrect.