Answer:
46.A 47.B 48.B 49.A.50.A.51.B.52.B
The answer of the questions serially is true, false,false ,true,true,false and false where blood is a tissue which circulated by the pumping organ that is heart.
What is heart?
Heart is a muscular organ which is present in most of the animals , it is responsible for pumping blood via the blood vessels to the entire body.The blood which is pumped carries oxygen and nutrients along with it.Along with it on it's way back to heart it carries carbon dioxide to the lungs.
Heart has an approximate size of a closed fist and is present between the lungs in the middle compartment of the chest. It is divided in to for chambers , the upper chambers called atria and lower ones called ventricles.
The wall of the heart is made up of three layers : epicardium,myocardium and endocardium. It pumps blood with a rhythm which is determined by a group of cells which are called the pacemaker cells present in the sinoatrial node.
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What is the correct chronological order of scientists contributing to the modern periodic table?
1. Lavoisier, Newlands, Moseley, Dobereiner, and Mendeleev
2. Lavoisier, Dobereiner, Newlands, Mendeleev, and Moseley
3. Moseley, Mendeleev, Newlands, Dobereiner, and Lavoisier
Answer:
the second one-Lavoisier, Dobereiner, Newlands, Mendeleev, and Moseley
Answer:
Lavoisier, Dobereiner, Newlands, Mendeleev, and Moseley
Explanation:
Edge 2021
How do ions form?please
Which of the following is a covalently bonded molecule?
A) CI2
B) air
C) Ne
D) salt
Answer:
D:salt this is the correct answer
At $2.186/gallon, how many pennies would it cost to buy 125 L of gasoline? (1 gallon =
128 oz, 1 oz= 29.6 mL)
PLS HELPPPP
Answer : The cost of pennies to buy 125 L of gasoline would be, $71.92
Explanation :
As we are given that the cost to buy gasoline is $2.186/gallon.
Now we have to determine the cost to buy 125 L of gasoline.
First we have to convert 125 L into gallon.
Conversion used:
(1 gallon = 128 oz, 1 oz= 29.6 mL, 1 mL = 0.001 L)
As, 1 L = 1000 mL
So, 125 L = 125000 mL
and,
As, 29.6 mL = 1 oz
So, 125000 mL = [tex]\frac{125000mL}{29.6mL}\times 1oz=4222.9oz[/tex]
and,
As, 128 oz = 1 gallon
So, 4222.9 oz = [tex]\frac{4222.9oz}{128oz}\times 1\text{ gallon}=32.9\text{ gallon}[/tex]
Now we have to determine the cost to buy 125 L of gasoline.
As, the cost of 1 gallon of gasoline = $2.186
So, the cost of 32.9 gallon of gasoline = $2.186 × 32.9
= $71.92
Therefore, the cost of pennies to buy 125 L of gasoline would be, $71.92
Cells with nuclei belong in the domain
Archaea
Bacteria
Eukarya
Protists
Answer:
Eukarya
Explanation:
if it has an nuclei its eukaryotic
Which describes an atom that has fewer neutrons than protons and more electrons than protons?
0negative compound
0positive compound
0positive ion
0negative ion
Answer:
Option d is correct = Negative ion
Explanation:
We know that an atom consist of electrons, protons and neutrons. Neutrons and protons are present inside the nucleus while electrons are present out side the nucleus. Electron has a negative charge and is written as e⁻. The mass of electron is 9.10938356×10⁻³¹ Kg . While mass of proton and neutron is 1.672623×10⁻²⁷Kg and 1.674929×10⁻²⁷ Kg respectively.
Symbol of proton= P⁺
Symbol of neutron= n⁰
The number of electron or number of protons are called atomic number while mass number of an atom is sum of protons and neutrons. The umber of protons and electrons are always equal to make the atom electrically neutral and when an atom loses its valance electron the number of protons increases and thus positive charge increased and atom form cation.
When an atom gain electron negative charge increase because of more number of electron thus atom form negative ion or anion. For example,
Anion formation:
X + e⁻ → X⁻
Cation formation:
X → X⁺ + e⁻
Thus option d is correct option.
An empty truck and a fully loaded truck are next to each other at a traffic light. When the light turns green, the lighter truck increases speed more quickly. Which of these best explains the situation?
Answer:
Newton's Second Law
Explanation:
Newton's second law of motion states that the acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
(I'm going to assume this is an option, but please let me know if it's not!)
The spongy layer of leaves stores water and food.
True
False
Answer:
True
Explanation:
The main function of the spongy layer is to temporarily store sugars, and amino acids synthesized in the palisade layer of the leaf (the palisade carries out most of photosynthesis)
Which of the following best describes the impact of glaciers upon the surface of the earth?
a.
Ice buried continents under a few hundred feet of ice.
b.
Glaciers scraped across the surface and altered landscapes and the course of rivers.
c.
The passage of glaciers created new ecosystems.
d.
All of the above.
Answer:
New Answer is : B - Glaciers scraped across the surface and altered landscapes and the course of rivers.
Explanation:
Edge 2020
The impact of glaciers on the surface is that glaciers scraped across the surface and altered landscapes and the course of rivers.
What is a glacier?A glacier refers to a heap of ice that has stayed there for a large number of years. The earth is filled with many glaciers and about 90% of fresh water are trapped in glaciers.
The impact of glaciers on the surface is that glaciers scraped across the surface and altered landscapes and the course of rivers.
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Select the substance or substances that are homogeneous mixtures
Solution
Compound
Colloid
Molecule
Suspension
Answer:
1 3 6 ones
Explanation:
Answer
Solution Compound Colloid
Explanation:
help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help help
Answer:
A
Explanation:
i think
I just need a sentence
Answer:
Plankton will never get the kraby patty secret formula
Explanation:
Which piece of ice has the most themal energy
A. 10,000 g ice sculpture at -1c
B. 10 g ice cube at -1c
it's B
Explanation:
just because 1111111111111111111
please help me out with this I WILL GIVE BRAINLIEST!!
You have to pick a element corresponding to what the sentence says, like for example it give you three element options and it would say, pick the smallest atom and that element would be the awnser!
Answer:
BE
Explanation:
I WILL GIVE U BRAINLIEST!!!!!!
Which sentence uses pasteurize correctly?
The painter must pasteurize the scene in pastel colors.
The cows were put in the field to pasteurize.
They pasteurize the juice to make it safe to drink.
We decided to pasteurize the documents for safekeeping
Answer: C
Explanation: They pasteurize the juice to make it safe to drink.
The sentence which uses pasteurization correctly is that they pasteurize the juice to make it safe to drink.
What is pasteurization?Pasteurization or pasteurisation is a process of food preservation in which packaged and non-packaged foods (such as milk and fruit juices) are treated with mild heat, usually to less than 100 °C (212 °F), to eliminate pathogens and extend shelf life. The process is intended to destroy or deactivate microorganisms and enzymes that contribute to food spoilage or risk of disease, including vegetative bacteria, but most bacterial spores survive the process.
The process is named after the French microbiologist Louis Pasteur whose research in the 1860s demonstrated that thermal processing would deactivate unwanted microorganisms in wine.Spoilage enzymes are also inactivated during pasteurization. Today, pasteurization is used widely in the dairy industry and other food processing industries to achieve food preservation and food safety.
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Which substance is a heterogeneous mixture?
Suspension
Solution
Compound
Colloid
Answer:
Suspension
Explanation:
Check all of the pure substances
below
Water
Oxygen
Salt Water
Solid gold ring
Mud (dirt and water)
Shampoo
the electron config for 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p3
Answer:
I don't understand what you are asking
Ill mark brainleist please helppp
Answer:
rusting, cooking and burning wood
at the bottom of the ocean a rock has a mass 25 g. At sea level the same rock wilk have a mass of:
less than 25 g
more than 25 g
exactly 25 g
Answer:
exactly 25 g
Explanation:
The mass of an object is universally the same every where. Even in outer space.
This is because, mass is the amount of matter contained in a substance. Since there is no loss in the amount of matter, the mass of the body stays the same.
It is weight that is subjected to changes with the value of gravity. Weight differs from places to places. A place with higher gravity will have a higher value of weight for any given mass.Mass accounts for every individual matter present in a substance.
When they remain the same, mass does not change. Only a change in the amount of matter in a body can cause variation in mass.
Therefore, at the bottom of the ocean, a body will have the same mass as on top and even at sea level.
Answer:
c. exactly 25 g
Explanation:
Please help I don't understand this-
Answer:
im sorry i think i know the answer but i dont want you to get it wrong
Explanation:
Answer:its C
Explanation:
bc were learning bout rn n we lagit just went over this
The factors in a experiment that do not change
Answer:
The answer is Constant.
(earth science not chem!!) What branch of Earth Science deals with stars and galaxies beyond Earth?
Answer:
The answer is Astronomy.
Explanation: Astronomy is the study of objects beyond the Earth’s atmosphere
What is the energy (ATP) from cellular respiration used for? Select all that are
correct.
option 1: movement
2: none of these answers are correct
3:growth
4:development
Answer:
1. movement
3. growth
4. development
Explanation:
ATP provides a source of chemical energy that powers all cell functions.
Any process in the body that requires energy relies on the conversion of ATP to ADP and the associated release of chemical energy. Therefore, movement, growth, and development all use ATP to take place.
An LED lightbulb has an energy efficiency of 89%. This means that 11% of the electrical energy that goes into an incandescent lightbulb is used to produce light energy.
Which statement best explains what happens to the other 11% of the electrical energy that goes into the lightbulb?
The leftover electrical energy is destroyed
The leftover electrical energy is transferred into heat energy
The leftover electrical energy is transferred into chemical energy
The leftover electrical energy is transferred into potential energy
Answer:
The leftover electrical energy is transferred into potential energy.
Explanation:
I'm pretty sure this is the right answer or The leftover electrical energy is transferred into chemical energy
Explanation:
Answer:
The left over energy turns into potential energy:))
Explanation:
cubic centimeter (cm^3) has the same volume as a
Answer:
1 cc=1 ml=0.001 liter
Explanation:
One cubic centimeter has the same volume as one milliliters. Both are equally used in analytical problems to express the volume of a substance.
What is volume ?Volume is a physical quantity that measures the total space occupied by a substance. Volume is an extensive quantity and thus depends on the amount of the substance.
The mass of a substance per unit volume is called its density. Volume is dependent on the intermolecular forces between the particles of the substance. The SI unit of volume is liter (L). Other units are ml, cm³, dm³ etc.
One cubic centimeter has the volume as one milliliters.
Hence, 1 cm³ = 1 ml
1000 m or 1000 cm³ is one liter of the substance.
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A gamma ray has a frequency of 1 x 10^20 Hz and has a speed of c. What is the
wavelength?
Answer:
λ = 3.0 × 10⁻¹² m
Explanation:
Speed of Light = Wavelength × frequency
c = λν
Step 1: Define
c = 3.0 × 10⁸ m/s
λ = unknown
ν = 1 × 10²⁰ Hz
Step 2: Substitute and Evaluate for λ
3.0 × 10⁸ m/s = λ · 1 × 10²⁰ Hz
λ = 3.0 × 10⁸ m/s ÷ 1 × 10²⁰ Hz
λ = 3.0 × 10⁻¹² m
When does the shape of a molecule affect its polarity?
A. When the molecule contains ionic bonds
B. When the molecule contains polar bonds
C. When the molecule contains hydrogen bonds
D. When the molecule contains nonpolar bonds
Answer:
B When the molecule contains polar bonds.
Explanation:
AP-EXpert
The shape of a molecule affect its polarity, when the molecule contains polar bonds because polarity depends on polar bonds.
What is the effect on polarity?The polarization of a molecule greatly depends on the shape of the molecule. The net dipole moment occurs only due to the uneven distribution of electrons between the two atoms.
So we can conclude that the shape of a molecule affect its polarity, when the molecule contains polar bonds because polarity depends on polar bonds.
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What is the hybridization of the C atoms in C2Cl4 ?
Answer:
sp2
Explanation:
Orbital hybridization is defined as the changes in the orbitals of atoms when they pair with electrons of other atoms to form chemical bonds.
C atoms in C2Cl4 or tetrachloroethene have a total of three bond pairs, two with each chlorine atom and one with other carbon atom and zero lone pairs. Thus, C atoms in C2Cl4 is sp2 hybridized.
Hence, the correct answer is "sp2".
The hybridization of the C atoms in C2Cl4 is sp² hybridized.
The concept of hybridization deals with the merging of atomic orbitals to produce fresh hybridized orbitals, which impact molecule geometry and bonding characteristics.
In the given compound, C2Cl4 (tetrachloroethene)
There is a substitution of all the hydrogen atoms attached to the organic compound ethene with chlorine to produce tetrachloroethene. The two carbon atoms are doubly bonded to each other with two chlorine attached to each of the carbon atoms diagonally given rise to a bond angle of 120°. Thus, the resulting hybridization of the C atom is sp² hybridized.
Therefore, we can conclude that the hybridization of the C atoms in C2Cl4 is sp² hybridized.
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The simple representation of a compound showing the ratio of elements is the___ formula.
Answer:
Chemical formula
Explanation:
because chemical formulas use chemical elements , symbols , and numbers to present information about the chemical proportions.