Answer:
D
Explanation:
An elephant standing in one place without moving is in static equilibrium. Therefore, option D is correct.
What is static equilibrium?Static equilibrium can be described as the sum of the exerting torques and forces on each part of the body that happens to be null.
In the static equilibrium of a body whose parts are in a state of rest. The essential condition for this type of equilibrium is that a body is not showing any form of movement.
In translational equilibrium, a body is not moving from one point to another while in rotational equilibrium is not spinning around a point. Translational equilibrium requires the sum of every outside force to be zero. Torque can be defined as a quantity that exerts the rotational movement of an object.
If two forces are acting on a body that is in the state of static equilibrium, where the total sum of forces is zero. Therefore, for the elephant standing in one place without moving there are only two forces i.e. the weight of the elephant and the normal force to balance it. Therefore, it describes in static equilibrium.
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Why would a laptop, a car, a cellphone, and a watch all contain chemical energy?
Answer:
Maybe its because they need some sort of energy to work, a car is quite straight forawrd but im not sure about a watch :/
Instructions
Look up(search for) the following words and learn to spell:
1. Incinerator.
2. Compositing.
3. Emission.
4. Biodegradable refuse.
5. Non-biodegradable refuse.
Answer:
What’s the question??
Explanation:
Answer:
Theres not a question for us to answer...
What is the molarity of a 0.51 L solution with 5.61 moles of lithium chloride?
plz help asap
Answer:
The molarity is 11 [tex]\frac{moles}{liter}[/tex]
Explanation:
Molarity is a measure of the concentration of a solute in a solution that indicates the amount of moles of solute that appear dissolved in each liter of the mixture.
The molarity of a solution is calculated by dividing the moles of the solute by the liters (volume) of the solution:
[tex]Molarity=\frac{number of moles of solute}{solution volume}[/tex]
Molarity is expressed in units ([tex]\frac{moles}{liter}[/tex]).
In this case:
number of moles of solute= 5.61 molessolution volume= 0.51 litersReplacing:
[tex]Molarity=\frac{5.61 moles}{0.51 liters}[/tex]
Solving:
Molarity= 11 [tex]\frac{moles}{liter}[/tex]
The molarity is 11 [tex]\frac{moles}{liter}[/tex]
Calculate the molality, freezing point, and
boiling point for each of the following water
solutions of nonionizing solutes:
1) 144 g of C6H1206 dissolved in 1000 g of H20
Answer: 1044
Explanation:
Select the correct answer.
In which location would a free neutron from a decaying U-235 atom be most likely to cause another atom to split?
OA
in a sample of naturally occurring uranium
B.
in a sample of enriched uranium
O C.
in a sample of rock or soil
D.
in the Sun's core
E.
in a distant star
Answer:
B. in a sample of enriched uranium
Explanation:
Decaying of U-235 atom is a process of nuclear fission. In this process a neutron is bombarded on U-235 and the uranium atom captures the neutron and divide immediately to release neutron. With the release of one neutron another nuclear fission process starts.
The free neutron is then split in a sample of enriched uranium because splitting nucleus releases high energy and enrich uranium increases the percentage of uranium-235 which further undergoes fission. This is why enrich uranium samples are used in atomic reactors.
Hence, the correct option is B.
Earth revolving around the sun, you walking down the street, and molecules moving in space all have
A. Potential energy
B. Kinetic energy
Answer:
B. Kinetic energy
Explanation:
moving is kinetic, potential is inside a body
How are a mole and a dozen similar?
Each represents a certain mass of material.
Each names a given number of objects.
Each identifies a specific volume.
Each measures a given number of amus.
Answer:
Each names a given number of objects (c)
Explanation:
Edge
Each names a given number of objects is the similarity present in mole and dozen.
What is mole and dozen?The mole refers to the number of particles or ions present in an atom in the quantity of 6.02 1023 particles while on the other hand, the dozen refer to the number of 12 items.
So we can conclude that each names a given number of objects is the similarity present in mole and dozen.
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What factor is responsible for keeping the inner core in a solid state?
O A. High temperature
OB. High pressure
O c. Strong magnetism
O D. Strong electricity
SUBMIT
Answer:B should be the right answer “High pressure”
Explanation:
What is the term used to describe the number of protons plus the number of neutrons in an atom?
Answer:
The atomic number is the number of protons in an element, while the mass number is the number of protons plus the number of neutrons.
Explanation:
According to most scientists, cold fusion
will not be a practical source of energy on Earth.
would be a practical source of energy on Earth if it were less expensive.
will be a practical source of energy on Earth within the next few decades.
will always continue to be a practical source of energy on Earth.
Answer
A IS THE ANSWER
Explanation:
A: will not be a practical source of energy on Earth.
According to most scientists, cold fusion will not be a practical source of energy on Earth.
What is cold fusion?Cold fusion is a hypothesized type of nuclear reaction that would occur at, or near, room temperature. It is usually regarded as the non practical source of energy on earth.
Thus, according to most scientists, cold fusion will not be a practical source of energy on Earth.
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An aqueous solution of sodium thiosulfate releases heat when it crystallizes. What would happen when sodium thiosulfate crystals dissolve in water?
Answer:
An excellent experiment is to heat sodium thiosulfate in a water bath. The solid crystals will dissolve into the water in the hydrated crystals forming a supersaturated solution. ... Placing a small crystal in the supersaturated solution will cause the liquid to turn solid.
PLEASE HELP
Why do atoms form bonds with other atoms? Provide example using octet rule
Answer:
For Covalent bonds, atoms tend to share their electrons with each other to satisfy the Octet Rule. It requires 8 electrons because that is the amount of electrons needed to fill a s- and p- orbital (electron configuration); also known as a noble gas configuration
Explanation:
Copper and silver are two examples of atoms that will form a(n)
metallic bond
ionic bond
covalent bond
none of the above
Answer:
covalent bond is the answer
Answer:
covalent bond
That's your answer!!
Help me please for brainliest and 10 points.
Answer:
The red arrow from igneous to sedimentary rock
Explanation:
When rocks are weathered and eroded, they become sediment. This sediment is later compacted and cemented to form sedimentary rock. Therefore, the red arrow going from igneous rock to sedimentary rock represents weathering and erosion.
Explain how the presence of copper atoms can produce an alloy stronger than pure gold
Answer:
Alloying metal lattice is intruded with strong metal atoms to provide it strength and enhance its durability
Explanation:
Mixture of two substances with an objective of improving the properties of any one of the elements is called an alloy. In the case of gold, Gold is alloyed with copper to enhance its flexibility, toughness and hardness. It can also be alloyed with range of metals including silver, copper, platinum, palladium, and zinc.
Pure gold is extremely soft for practical use. Copper also enhance the malleability and ductility of gold metal.
a hurricanes energy comes from
Answer:
Heat and water.
Explanation:
Increased evaporation means more water vapor in the air and more energy ready to be liberated in the hurricane's thunderstorms as water vapor condenses.
which sequence ranks the chemical reactions in order from fastest to slowest
Answer:
Its C
Explanation:
Just did it
Describe the motion of molecules in an ice cube
and in a radiator in winter.
Molecules in an ice cube move more slowly than molecules
radiator
COMPLETE
Describe the motion of molecules in these two
substances when the ice cube is placed on the
radiator.
AUCU
Answer:
Molecules in an ice cube have lower kinetic energy than molecules in a radiator. Molecules in an ice cube move more slowly than molecules in a radiator. They collide with less force than molecules in a radiator.Molecules in an ice cube have lower kinetic energy than molecules in a radiator.
Molecules in an ice cube move more slowly than molecules in a radiator. They collide with less force than molecules in a radiator.
When in direct contact, the fast-moving molecules in the radiator collide with the slow-moving molecules in the ice cube.
Kinetic energy is transferred from the molecules in the radiator to the molecules in the ice cube, causing a slowdown of the radiator molecules and an acceleration of the ice molecules.
Explanation:
Why the southern hemisphere experiences summer when the northern hemisphere experiences winter.
Answer:
Northern hemisphere and southern hemisphere are two poles of the earth that are responsible for a different environment.
Explanation:
Theses both hemispheres have different climate at its poles. This happened because of pf the tilt of the earth. on the axis. When the northern pole gets tilt towards the sun it gets to summer.
The northern poles get sarcastically hotter season. So that when the northern pole is hotter the southern pole gets cooler at that time. All has happened because the earth gets tilted towards its poles or axis.
Why do we not have solar and lunar eclipses every month?
Answer:
The moon's path around Earth is tilted compared to Earth's orbit around the sun. The moon can be behind Earth but still get hit by light from the sun. ... This is why we don't get a lunar eclipse every month.
Explanation:
Answer:
Explanation:
Because the sun only overlaps the moon once every 2-3 years
Which of the following statements describes all the variables in an experiment?
A.
All variables are measured to provide data for the experimental results.
.
B.
All variables are kept the same from one part of the experiment to another.
OC.
All variables affect the results of the experiment.
O
D.
All variables are changed from one part of the experiment to another.
Answer:
Answer is C
Explanation:
All the variables can affect the results in an experiment
Given the reaction that occurs in an electrochemical cell:
Zn(s) + CuSO4(aq) ZnSO4(aq) + Cu(s)
During this reaction, the oxidation number of Cu changes from
A) 0 to +2
B) 0 to –2
C) +2 to 0
D) –2 to 0
Answer:
c) +2 to 0
Explanation:
SO4 has a charge of -2, so the Cu attached to that has to be a +2 since the polyatomic molecule has no overall charge
Cu(s) is a solid metal and they have no charge, therefore it is zero
Copper undergoes Oxidation (gain of electrons)
Speed is calculated by taking
divided by time.
Save and Exit
Next
Submit
Mark this and return
Answer:
Look speed is calculated by using formula
Speed(s)=distance travellelled (d) / total time taken (t)
s=d/t
It's unit is m/s
Which of the following reactions describes a beta emission?
(PLEASE HELP!!!)
Answer:
The third option is correct
Explanation:
1. How does the molecular property of water affect its cohesive properties?
Answer:
Water molecules have strong cohesive forces thanks to their ability to form hydrogen bonds with each other.
Explanation:
Cohesion refers to the attraction of molecules by other molecules of the same type.
The structure of the water molecule is given by two hydrogen atoms and one oxygen atom that are held together by covalent bonds. It is a polar molecule and consequently forms bonds called hydrogen bonds with other molecules.
How many Oxygen elements are in a carboxylic acid
Answer:
Carboxylic acid, any of a class of organic compounds in which a carbon atom is ... to an oxygen atom by a double bond and to a hydroxyl group by a single bond. ... sour-milk products) and citric acid (found in citrus fruits), and many keto acids ...
Explanation:
Answer:
There a 2 oxygen elements in a carboxylic acid.
Explanation:
If 12.5 grams of strontium hydroxide is reacted with 150 mL of 3.5 M carbonic acid, identify the limiting reactant.
Answer:
Sr(OH)2
Explanation:
We'll begin by calculating the number of mole of carbonic acid in 150mL of 3.5 M carbonic acid solution. This is illustrated below:
Molarity = 3.5M
Volume = 150mL = 150/1000 = 0.15L
Mole of carbonic acid, H2CO3 =..?
Mole = Molarity x Volume
Mole of carbonic acid, H2CO3 = 3.5 x 0.15 = 0.525 mole.
Next, we shall convert 0.525 mole of carbonic acid, H2CO3 to grams.
Mole of H2CO3 = 0.525 mole
Molar mass of H2CO3 = (2x1) + 12 + (16x3) = 62g/mol.
Mass of H2CO3 =..?
Mass = mole x molar mass
Mass of H2CO3 = 0.525 x 62 = 32.55g
Next, we shall write the balanced equation for the reaction. This is given below:
Sr(OH)2 + H2CO3 → SrCO3 + 2H2O
Next, we shall determine the mass of Sr(OH)2 and H2CO3 that reacted from the balanced equation. This is illustrated below:
Molar mass of Sr(OH)2 = 88 + 2(16 + 1) = 88 + 2(17) = 122g/mol
Mass of Sr(OH)2 from the balanced equation = 1 x 122 = 122g
Molar mass of H2CO3 = (2x1) + 12 + (16x3) = 62g/mol.
Mass of H2CO3 from the balanced equation = 1 x 62 = 62g.
From the balanced equation above, 122g of Sr(OH)2 reacted with 62g of H2CO3.
Finally, we shall determine the limiting reactant as follow:
From the balanced equation above, 122g of Sr(OH)2 reacted with 62g of H2CO3.
Therefore, 12.5g of Sr(OH)2 will react with = (12.5 x 62)/122 = 6.35g.
We can see evidently from the calculations made above that it will take 6.35g out 32.55g of H2CO3 to react with 12.5g of Sr(OH)2. Therefore, Sr(OH)2 is the limiting reactant and H2CO3 is the excess reactant
Answer:
Strontium hydroxide.
Explanation:
Hello,
In this case, the undergoing chemical reaction is:
[tex]Sr(OH)_2+H_2CO_3\rightarrow SrCO_3+2H_2O[/tex]
Thus, the first step is to compute the moles of both strontium hydroxide (molar mass = 121.63 g/mol) and carbonic acid given the mass and volume and concentration respectively:
[tex]n_{Sr(OH)_2}=12.5gSr(OH)_2*\frac{1molSr(OH)_2}{121.63gSr(OH)_2} =0.103molSr(OH)_2\\\\n_{H_2CO_3}=3.5mol/L*0.150L=0.525molH_2CO_3[/tex]
Therefore, as they are in a 1:1 molar ratio in the chemical reaction, the same moles of both strontium hydroxide and carbonic acid must react, nevertheless, there are more moles of carbonic acid, for that reason, the limiting reactant is strontium hydroxide.
Best regards.
Concentration and ion moles are equal only when volume is what ?
Concentration and ion moles are equal only when volume is 1. Of 1.0 x 10-6 and 1.0 x 10-4, the larger number is 1.
The concentration of ions in a solution depends on the mole ratio. The molarity is the moles per solute upon the value of the solution. The official symbol of molarity is the concentration (c)
The concertation is the ratio or the amounts of solute per amount of solution. Molarity is the unit of concentration that relates to the number of moles solute per liter of solution. Molarity is moles of solute / 1Lt of solution. Moles are equal only when the volume is indirectly proportional to the solution.Learn more about the concentration and ion moles that are equal.
brainly.com/question/23314887.
When a radioactive decay occurs what is released?
A. Only protons and neutrons
B. Only electrons
C. Protons/Neutrons, beta particle, gamma ray
D. Only gamma rays
When a radioactive decay occurs, protons/neutrons, alpha/beta particles and gamma rays are all released depending on the type of decay.
is going from gas to plasma a chemical change?
Answer:
Yes from going to gas to plasma is a chemical change.
Explanation:
I hope this helps :)