Answers
Answer:
The last one
Explanation:
Related Questions
Describe the periodic trend in the ionization energy of elements down a group. Use the periodic table, ionization energy and your knowledge of atomic radius as evidence.
Answers
Answer:
As we move down the group it increases.
Explanation:
This is because the electrons are farther away from the nucleus and hence they are not tightly bounded.
A tower built of Iron is 500 meter tall. What is the change in height (m) if it is exposed to 25 0 Celsius during summer and at 1.00 Celsius during winter. α iron = 1.2 x 10-5/ Celsius
Answers
Answer:
-0.144 m
Explanation:
From the question,
α = Δh/(h₁Δt).................... Equation 1
Where α = coefficient of linear expansivity of iron, Δh = change in height, h₁ = initial height, Δt = change in temperature.
make Δh the subject of the equation
Δh = α(h₁Δt)..................... Equation 2
Given: α = 1.2×10⁻⁵/°C, h₁ = 500 m,
Δt = (t₂-t₁) Where t₂ and t₁ = Final and initial temperature respectively.
Δt = (1-25) = -24 °C
Substitute these values into equation 2
Δh = 1.2×10⁻⁵[500×(-24)]
Δh = 1.2×10⁻⁵(-12000)
Δh = -0.144 m
Explain why the Cell A (nerve cell) and Cell B (red blood cell) cannot switch jobs
Answers
That is copied from “gene expression” article
But all in all, the cells have different structures and different jobs. This means that they are produced for that one job and cannot be made to do another job that they aren’t specifically made for. As well the dna make up will produce these cells specifically and in different cells than the other.
Hopefully this helps some. Have a nice day!
Match the words and the definitions (15 points for you, please answer quickly <3)
Question 1 options:
Umbra
Eclipse
Penumbra
Corona
1.
The outer, larger, lighter shadow
2.
During a solar eclipse, the moon covers the sun, a small ring of fire is visible around the edge
3.
to vanish
4.
the inner, darkest, cone-shaped shadow is
Answers
Umbra is cone shaped, darkest, inner shadow, eclipse means to vanish, when moon covers sun during solar eclipse, ring of fire visible is called as corona, and larger, lighter shadow of outside is called penumbra. Thus, 1. D, 2. C. 3. B, 4. A are correct.
What is an eclipse?When any astronomical object is temporarily become unclear, because its light is blocked by another object bypassing it, during an astronomical event it is called as eclipse.
Umbra and penumbra re caused by solar eclipse. When light source is completely covered by light source, it is called umbra and when, partial illumination or partial shadow occur, it is called penumbra.
The ring of light visible around edges, during solar eclipse, it is called as corona. Therefore, option 1. D, 2. C. 3. B, 4. A are correct.
Learn more about eclipse, here:
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Which characteristics of flower petals help an angiosperm reproduce? (Select all that apply.)
Answers
Answer:
attractive smell and bright colours
does anybody know the answer to this?
Answers
Answer:
The answer is Conduction.
If you get a root canal or any other potentially painful procedure done at the dentist's office, he or she will probably inject your gums with a local anesthetic to "numb the pain." Neurons that trigger pain are called nociceptors. They trigger pain in order to alert the body to potentially dangerous stimuli. Most local anesthetics hinder the activity of all local neurons, not just nociceptors, so pain is not the only sensation that goes away temporarily. Because all feeling is gone, you can end up drooling on yourself without knowing it.
Considering this information about local anesthestics, which of the following statements best demonstrates that science is an ongoing process that changes in response to new information and discoveries?
A. There are a variety of local anesthetics being used today, including lidocaine, prilocaine, and mepivacaine.
B. Sir Charles Sherrington, who discovered nociceptors, wrote a book about the nervous system that helped show its role in allowing organisms to adapt to their environments.
C. Unlike a local anesthetic, a general anesthetic causes a person to lose consciousness rather than sensation in one area.
D. Scientists have discovered a way to use a compound found in hot peppers, capsaicin, along with an anesthetic in order to block nociceptors only.
Answers
An idea is being proposed. The steps that led to the idea are listed below:
There was a review by the scientific community.
The data collected was observable and measurable.
Opinion and values of all social groups were implemented.
Can this idea be scientific?
A. Yes, because the idea was tested empirically.
B. No, because opinions and social values may lead to bias.
C. Yes, because all steps of the scientific method were followed.
D. No, because the scientific community often favors its peers.
Answers
Answer:
No because opinion and social values may lead to bias
Explanation:
I'm smart >:)
B. No, because opinions and social values may lead to bias.
if it's wrong correct me but I'm pretty sure that's right!
someone help ,, I'll give brainliest lolll .
Answers
Answer:
# 4
Explanation:
Toxicity is the degree to which a chemical substance or a particular mixture of substances can damage an organism.
someone help ,, I'll give brainliest lolll .
Answers
Answer:
#2
Explanation:
Corrosion is a natural process that converts a refined metal into a more chemically stable form . It is the gradual destruction of materials by chemical
What does water offer that attracts human settlement?
Answers
Answer:
Water is a human necessity. Therefore, it is one of the first things a human settlement would need to have. A community cannot thrive without a water source.
Answer:
Water is a basic need that is more than a necessity, humans can't survive without water for more than a period of three days, And thus having water as available, creates a tendency among humans as humans like to get everything at ease so they tend to settle near the water bodies if possible.
Which is a higher concentration, 10-9 M or 10-8 M? Explain.
Answers
Answer:
10-9 Millimeters/liters
Explanation:
Because 10-9 M Is more than 10-8 M
I hope this is correct
Question #9: What is the
temperature at an altitude of 50
kilometers above sea level?
Answers
Answer:
20ºCelsius
Explanation:
hi can you balance the equation Fe + O2 = Fe2O3
Answers
Answer:
4Fe + 3O2→ 2Fe2O3
Explanation:
Fe + O2 → Fe2O3 is the unbalanced form of chemical reaction.
Balancing the simple molecules first, in this case the O2
Fe + 3O2→ Fe2O3 there are now 6 O atoms on the left, there must also be 6 O atoms on the right.
Fe + 3O2 → 2Fe2O3
Balance the rest of the equation.
4Fe + 3O2→ 2Fe2O3
11. What is the molarity of a solution that has 0.512 moles of NaCl dissolved in 0.24 L of solution? (Show WORK. Circle the correct answer: 2.1M or 1.2M)
Answers
Answer:
2.1 M
Explanation:
Molarity is moles per liter:
0.512 mol NaCl / 0.24 L = 2.1 M
whats the number of atoms in 5CaC12?
Answers
There are 70 atoms in 5CaC12
someone help ,, I'll give brainliest loll .
Answers
Answer:
the answer is the emission of radiation from an atoms of a unstable element
Answer:
the answer is number 3, the emission of radiation...
Explanation:
What is the mass of oxygen in 10 grams of water?
Answers
Answer:
The answer is 16.00 amu
What is the oxidation state of S in S2032-?
O A. +3
O B. -2
O C. +4
D. +2
Answers
Answer: D.) +2
so the oxidation state of sulfur is +2.
Explanation:
The melting point of a substance is the same as its _____ point.
evaporation
freezing
boiling
sublimation
Answers
can someone help me i need it before 10:10
Answers
Answer:
B 6NO A 5N2 C 6H2O D 4Nhd
Explanation:
Which of the following objects would take you the greatest amount of force to accelerate?
Answers
Complete question is;
Which of the following object would take you the greatest amount of force to accelerate.
A) a soccer ball with a mass of 0.5 kg
B) a refrigerator with a mass of 200 kg, C) a bike with a mass of 25 kg
D) a car with a mass of 5,000 kg,
Answer:
D) a car with a mass of 5,000 kg
Explanation:
Formula for force is;
F = ma
Where;
F is force
m is mass
a is acceleration
Now, Force is directly proportional to the acceleration and mass.
Thus, the higher the mass, the greater the force.
Thus, the object that will require the most force is the one that has the highest mass.
Looking at the options, the one with the highest mass is option D.
The balanced equation below shows the products that are formed when butane (C4H10) is combusted.
2C4H10 + 13O2 Right arrow. 8CO2 + 10H2O
What is the mole ratio of butane to carbon dioxide?
2:8
1:5
13:8
13:10
Answers
Answer:
2:8
Explanation:
Answer:
2:8
Explanation:
got it right on edge
An object accelerates 5.0 m/s2 when a force of 12.0 newtons applied to it.What is the mass of the object?
Please help, I haven’t seen this question anywhere !
Also this is from my Science Class
Answers
Answer:
2.4kg
Explanation:
Newton's 2nd law tells us that force is equal to the mass of an object multiplied by its acceleration, or F = ma. We can solve this equation for mass by rearranging algebraically:
m = F/a
So:
m = (12.0N)/(5.0m/s2) = 2.4kg
Why do lawmakers have so much to consider when debating effective energy policies 
Answers
Answer: Different ways of distributing energy have different short-term and long-term environmental consequences.
Explanation:
Due to the big issue of some energy sources being non-renewable and some being renewable, lawmakers have a lot on their plate. Non-renewable sources of energy are harmful to the environment, but they work the best. Renewable sources of energy cost a lot and work, but they require a lot of effort.
In a metallic bond electrons are _______________. A. transferred C. shared B. delocalized D. lost
Answers
Answer:
in a metallic bond electrons are delocalized
WHAT ARE SOME POSSIBLE CONSEQUENCES IF A HUMAN BODY DOES NOT MAINTAIN
HOMEOSTASIS
Answers
Answer: If homeostasis is disrupted, it must be controlled or a disease/disorder may result.
Explanation: What happens if there's disruption? Your body systems work together to maintain balance. If that balance is shifted or disrupted and homeostasis is not maintained, the results may not allow normal functioning of the organism.
In a solution made of baking soda and water, the baking soda is the?
Answers
Answer:
solute
Explanation:
water is the solvent and baking soda is the solute and it dissolve in water to make a solution
Match the items to use the analogy of time to the vocabulary of chemistry.
1 Year
Amount of Matter
Time in general
-
1 Atom/Particle
1 Second
1 Mole
1
Answers
Answer:
1 year- 1 mole
time in general- amount of matter
1 second- 1 atom/ particle
How far is Louisville from the nearest oil field?
Answers
Answer:
anyywhere between 20-23 miles
Explanation:
it depends what type of oil field u mean
15,499 km is Louisville from the nearest oil field. Therefore, option A is correct.
What do you mean by an oil field ?An oil field is defined as a piece of land beneath which fossil fuels can be extracted for economic value. The world's oil is concentrated in oil fields found in the Middle East, along with other large deposits discovered beneath the ocean's surface.
Oil wells are classified into three different categories. Those that exclusively formed oil, those that exclusively formed natural gas and those that formed both oil and natural gas.
Petroleum supplies transportation fuel, is a part of many chemicals and medicines, and is used to create crucial items such as heart valves, contact lenses, and bandages. Oil reserves attract outside investment and are important for improving countries' overall economy.
Thus, 15,499 km is Louisville from the nearest oil field, option A is correct.
To learn more about an oil field, follow the link;
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Your question is incomplete, most probably your question was
How far is Louisville from the nearest oil field?
A.15,499 km
B.15,499 m
C.14,567 km
D.14,567 m