5 hours 10 minutes right ascension and -8⁰ declination.
A Rock is determined to be 1.426 billion years old. How much uranium -235 remains in the rock?
Answer:3.5930 million
Explanation:
So I need to turn in a one-pager about repetition and replication, and for an extra credit it says "Write two rhymes using information from your notes about repetition and replication. Use the proper grammatical format." I have no idea what to put down but I still wanted to get extra credit to help my grade a bit. (This is supposed to be Science- 7th grade, but I couldn't find the "Subject". Sorry)
Here's a rhyme about repetition I just made:
For accurate data, repeat and repeat,
so any inaccuracies will be beat!
Here's a rhyme about replication I just made:
Replication is important, so check your experiment.
When you replicate, with your results you'll feel confident!
I hope this helps! Feel free to give me Brainliest if you feel this helped. Have a good day and good luck on your assignment. :)
Why do you think it’s useful for scientists to classify matter? In other words, why do you think scientists need to identify something as a pure substance? Why do you think they need to know if something is a compound or an element?
Answer:
They need to know
Explanation:
Because if we didn't know that something was a compound of an element we could either blow ourselves up when we are mixing them or when we are looking for something bad between the compound and we don't know its a compound how do we fix it
Classifying substances as elements or compounds helps us to understand their properties.
Matter is anything that has mass and occupy space. There are several substances in the universe and all of them are composed of matter. It is necessary to classify matter for reference purposes. When we classify matter then it is possible to refer to substances under specific classes.
A pure substance contains only one kind of matter. It is necessary to classify something as a pure substance so that it is we can know if it contains one type of matter or different types of matter.
It is necessary for scientists to classify something as element or compound in order to understand its properties. Elements and compounds are pure substances.
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Plz help!
How does the path of a river change over time? (describe the process)
Answer:
All rivers naturally change their path over time, but this one forms meanders
Explanation:
When you stand next to a river, its path doesn't seem to move.
All rivers naturally change their path over time, but this one forms meanders at an especially fast rate, due to the speed of the water, the amount of sediment in it, and the surrounding landscape.
How many outer electrons does a noble gas like Neon or Xenon have? Does this mean it is highly reactive, somewhat reactive, or non-reactive? *
8, non-reactive
1, highly reactive
4, somewhat reactive
4, highly reactive
1, somewhat reactive
1, non-reactive
8, highly reactive
8, somewhat reactive
4, non-reactive
Fill in the blank
The (blank) of a rock is a result of its mineral composition.
What are characteristics of transition metals? Select all that apply. *
usually liquid or gas at room temperature
good conductors of heat and electricity
malleable
high density
Answer:
They are good conductors of heat and electricity
and have high density
Explanation:
transition metals are not usually liquid
How can I use chemical properties in a sentence?
Answer:
A property used to characterize materials in reactions that change their identity. 1, The chemical properties of coal are still incompletely understood. 2, Nevertheless, taken on balance, if you possess unpleasant chemical properties, it pays to advertise
Explanation:
can some give me a summary about .Electrostaticen force plz
Answer:
The electrostatic force is also known as the Coulomb force or Coulomb interaction. It's the attractive or repulsive force between two electrically charged objects. Like charges repel each other while unlike charges attract each other. Coulomb's law is used to calculate the strength of the force between two charges.
Explanation:
Which of the following pH values represents a strong acid?
1
8
13
7
Answer:
1
Explanation:
acid is 0-3 lower numbers
Which metals are so reactive that they are never found as uncombined elements in nature?
A. alkaline earth metals
B. alkali metals
C. rare earth metals
D. transition metals
A tool might be made of an alloy because the alloy _____.
A. occurs naturally
B. resists rust
C. can bend easily
D. is softer
Your answer is:
B. Resists rust.
A tool might be made of an alloy because the alloy resists rust.
Why?
Iron is a great building material but steel (an alloy made by adding small amounts of non-metallic carbon to iron) is stronger, harder, and rustproof. Aluminum is a very light metal but it's also very soft in its pure form.
Alloy steels have a wide range of special properties, such as hardness, toughness, corrosion resistance, magnetizability, and ductility. Nonferrous alloys, mainly copper–nickel, bronze, and aluminum alloys, are much used in the coinage.
____________________________________________________________
Hope this helps!
⊕If this answer does not answer your question or displeases you, tell me in the comments and I will try to find the right answer and replace it ASAP. Thank you.⊕
Have a good day.Which layer of the ocean is the least dense?
1. middle layer
2. closest to the ocean floor
3. they are all the same
4. closest to the surface
Answer:
closest to the ocean floor
Explanation:
the ocean floor contains more salt then the surface of the ocean
*URGENT*
What subatomic particle determines the type of element? *
Electron
Neutron
Proton
Mass number
Answer:
Protons
Explanation:
Forming the nucleus are two kinds of particles: protons, which have a positive electrical charge, and neutrons, which have no charge. All atoms have at least one proton in their core, and the number of protons determines which kind of element an atom is. For example, an oxygen atom has 8 protons.
Sidenote: Hope this helps! :D
(Subject is actually 8th Grade Science But The don't have that... i'm sorry.)
Question:
If you have two objects with different masses about to fall from the same height. Which one will have the greatest potential energy?
Group of answer choices:
A.) Smallest
B.) Largest
C.) Roundest
D.) Flattest
Answer:
I am Going to say the smallest im in 8th grade and i got that right
Explanation:
please help me ill give brainiest
What is density?
1. a measure of salinity
2. the weight of water
3. the amount per unit volume of a particular material
4. the amount of salt in water
PLEEASEE HELP ITS PAST DUE AND IM GIVING BRAINLIEST
Which process is an example of a physical change?
a. wood burning in a camp fire
b. iron rusting on a bicycle chain
c. ice melting after a snow storm
d. milk souring because it is old
Answer:
c or d
Explanation:
i dont know which one but it's one of those
Danny is trying to figure out how fast sugar crystals can dissolve in water. He has already tested crystals of table sugar by just pouring packets of sugar into a bowl of room-temperature water.
Which should Danny try next if he wants to make the sugar dissolve slower?
A.
stir the water
B.
use larger crystals
C.
heat the water
D.
all of these
Answer:
B
Explanation:
You mix two cleaning chemicals and they start bubbling and releasing a funny smelling gas. First, run because it is poisonous! Second, was that a physical or chemical change? How do you know?
Answer:
it's a chemical change
Explanation:
When two different chemical substances are mixed they are no longer the same and can not be changed back so therefore it's a Chemical reaction.
PLZ answer as fast as you can I need it asap!
An ecosystem is the _____________________ between the abiotic and ____________ factors in an area.
Question 3 options:
A)Balance, biotic
B)Competition, biotic
C)Interaction, nonliving
D)Interaction, biotic
Answer:
D) Interaction, Biotic
An ecosystem is the interaction between the abiotic and biotic factors in an area.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the ecosystem through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil. There are different ecosystems present in the world.
Learn more about ecosystem,here:
https://brainly.com/question/1673533
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What is the reactants start for H2 + O2 --> H2O
Answer:
H2 + O2
Explanation:
H2 + O2 --> H2O
The items on the left side is the reactants. The arrow means yields, and the item the arrow is pointing at is the product.
Answer:
h²0
Explanation:
I'm sorry , id ask g00gle
Which group of elements has the highest boiling point? * IIIa (13) IIa (2) Ia (1) IVa (14) Transition metals
Answer:
the elements that have the highest boiling is transition metals
Which is not true of the element nitrogen?
A. There is more nitrogen gas in the air than oxygen.
B. Nitrogen atoms form diatomic molecules.
C. Nitrogen in the air is highly reactive.
D. Nitrogen is used as a fertilizer for soil.
Identify the most abundant cell type making up the epidermis and provide evidence to support your claim
Answer: A keratinocyte
Explanation: A keratinocyte is the primary cell type (about 90%) within the epidermis which is the outermost layer of the skin. The alternate names for keratinocytes are basal cells since they are found in the basal layer (the stratum basale) of the skin.
Which of these is most likely to happen to a grassland ecosystem after a catastrophic flood?
Birds will compete for water.
Amphibious snakes will compete for space.
Flying insects will have to find new sources of food.
Ground-dwelling rodents will have to find new shelter.
Answer:
ground-dwelling rodents will have to find new shelter
After a catastrophic flood in a grassland ecosystem , ground-dwelling rodents will have to find new shelter.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
Learn more about ecosystem,here:
https://brainly.com/question/1673533
#SPJ6
please help i dont understand this
The most useful property of metalloids is their _____.
A. stored energy which is released through combustion
B. being non-reactive with other elements
C. value when used to make precious jewelry
D. varying ability to conduct electricity
Answer:
DDDDDDDDDDDDDDDDDDExplanation:
i just answer this it's corect trust meeeI REALLY NEED HELP ITS DUE AT 11:59 PM
Answer:
I attached a photo of balanced equations but thats as much as I can help.
Explanation:
Directions:
Read the article and then answer the questions. Consider answering these questions please. The questions are on the pdf attached to this question.
Answer:
1.
a) F; Insulator
b) F; are always moving
c) T, T, T
d) T, T, T
2. b; firm and not readily movable
3. a; occupied
4.
Temperature: =
Thermal energy: <
sentences: 14, 15
5. cool
sentence: 21
6. radiation; the heat from the heating coil is radiated to the cake and causes it to rise
(though if you really want to sound smart you can explain how all of them are used) (radiation: heating coil; convection: hot air circulating in the oven; conduction: cake pan to cake)
7. conduction; the heat from oatmeal is transferred to the bowl through contact
8. convection; the air is circulated due to uneven heating (of the earth by the sun)
9. (rephrase this answer in your own words)
jacket: Insulator; prevents heat loss from the cold outside airsleeping bag: insulator; keeps me warm at night while it is cold outside of itcooking pans: conductor; heat from the flame (of a stove) is transferred to the pan to cook food; it would be very inefficient to use an insulator for something that needs to transfer heat(metal) tent stakes: get cold fairly quickly in the cold air, if they were insulators then they would not change in temperature so quickly
10. as the wax melts and turns to liquid the particles drastically speed up to the point where they begin to flow around each other
Answer:
1.
a) F; Insulator
b) F; are always moving
c) T, T, T
d) T, T, T
2. b; firm and not readily movable
3. a; occupied
4.
Temperature: =
Thermal energy: <
sentences: 14, 15
5. cool
sentence: 21
6. radiation; the heat from the heating coil is radiated to the cake and causes it to rise
(though if you really want to sound smart you can explain how all of them are used) (radiation: heating coil; convection: hot air circulating in the oven; conduction: cake pan to cake)
7. conduction; the heat from oatmeal is transferred to the bowl through contact
8. convection; the air is circulated due to uneven heating (of the earth by the sun)
9. (rephrase this answer in your own words)
jacket: Insulator; prevents heat loss from the cold outside air
sleeping bag: insulator; keeps me warm at night while it is cold outside of it
cooking pans: conductor; heat from the flame (of a stove) is transferred to the pan to cook food; it would be very inefficient to use an insulator for something that needs to transfer heat
(metal) tent stakes: get cold fairly quickly in the cold air, if they were insulators then they would not change in temperature so quickly
10. as the wax melts and turns to liquid the particles drastically speed up to the point where they begin to flow around each other
Explanation:
I hope this helps