The answer is Li2O.
Lithium metal is isolated electrolytically from a mixture of lithium chloride and potassium chloride. The nucleus of the lithium atom verges on instability, since the two stable lithium isotopes found in nature have among the lowest binding energies per nucleon of all stable nuclides.
Answer:
The chemical formula Li₂O represents the compound formed by these two elements.
Explanation:
An ionic bond is produced between metallic and non-metallic atoms, where electrons are completely transferred from one atom to another. During this process, one atom loses electrons and another one gains them, forming ions. Usually, the metal gives up its electrons forming a cation to the nonmetal element, which forms an anion. In this way, the octet rule is fulfilled, which establishes that the atoms of the elements bind each other in the attempt to complete their valence layer, leaving the atom stable with 8 electrons in its last layer.
In this case, lithium Li is a metal that has only one electron, which can be transferred to oxygen O through an ionic bond. But you must keep in mind that when joining atoms you must keep the molecule neutral. To maintain said neutrality, then the charges present in the combined atoms cross multiply with the atoms.
In this case, you know that the lithium oxidation number is +1 and the oxygen oxidation number is -2.
Then, as mentioned above, when both chemically combine with each other, the lithium atom will be multiplied by 2, while the oxygen atom will be multiplied by 1.
Then, the chemical formula Li₂O represents the compound formed by these two elements.
Wich subatomic particles will you add or remove to change the mass of an atom? A)electrons and protons B)protons or neutrons C)electrons or neutrons D) Electrons only
How do I calculate average velocity
Average velocity has two parts: Its magnitude (size) and its direction.
Its magnitude is
(straight-line distance between start-point and end-point, regardless of the route that's actually followed from start to finish) divided by (time taken to travel from start to finish).
Its direction is
(direction from start-point to end-point)
Notice that straight from this definition, the average velocity of going around a full circle is zero, no matter how fast you traveled. That's because the size of the average velocity is calculated from the straight-line distance from start-point to end-point, and that's zero if you finish at the same point you started from.
Which sentence best describes the runner whose velocity-time graph is shown?
' C ' is the correct description of the graph.
what does a water wave transfer
Which of theses substances would be a poor conductor of electricity
Answer:
B. Water and sugar.
Explanation:
In the given options water and sugar would be the poor conductor of electricity. Other given options such as water and salt, water and Hcl and water and NaOH are better conductor of electricity because Hcl ,NaOH, salt (Nacl) can break into their ionic form whereas water and sugar will not.
Answer: B Water and Sugar
Explanation: I checked and I had the question
Help please ???? I don’t get it
As density =mass/volume
Mass is measured in kilogram & volume measured in m^ 3
So the correct statements are given
Density is derived unit of measurement.
Density is ratio of mass to volume
Density is physical property of object.
if a block is in equilibrium the magnitude of the block's acceleration is
Answer:
zero.
Explanation:
The condition for an object to be in equilibrium is that there is no resulting force acting on it, in other words, that the force on the object is zero:
[tex]F=0[/tex]
and by Newton's second law we know that
[tex]F=ma[/tex]
where [tex]m[/tex] is the mass of the object, and [tex]a[/tex] its acceleration.
So combining the two things:
[tex]F=ma=0[/tex]
⇒[tex]ma=0[/tex], This equation is fulfilled when [tex]a=0[/tex]
Wich tells us that for the the block to be in equilibrium, the acceleration must be zero:
[tex]a=0[/tex]
If a block is in equilibrium the magnitude of the block's acceleration is 0m/s²
According to Newton's second law, the force acting on a body is equal to the product of its mass and acceleration.
Mathematically F = ma where:
m is the mass of the object
a is the acceleration of the object
If a block is in equilibrium, the magnitude of the force acting on the block will be 0, that is F = 0
Substituting F = 0 into the formula above to calculate the acceleration;
F = ma
0 = ma
Swap sides
ma = 0
a =0/m
a = 0m/s²
This shows that if a block is in equilibrium the magnitude of the block's acceleration is 0m/s²
Learn more here: https://brainly.com/question/17811936
What is one advantage the Hyperloop would have over other types of transportation?
Answer:
The advantage of Hyperloop is that it is a high-speed transport that does not pollute nature because it does not use fossil fuels.
Explanation:
Basically, Hyperloop is a transport system that works in a kind of aluminum capsule that circulates inside pneumatic tubes and can reach the 1,200 km / h mark. To better illustrate the idea, think of the cartoon "The Jetsons", where the characters used vacuum tubes to move around buildings. It is more or less that, only on a much larger scale: the initial idea is to take a trip from San Francisco to Los Angeles in about half an hour.
In addition to the high speed, the system is supplied with renewable energy and is still capable of generating a surplus of solar, wind and kinetic energy that can be sold to the public network, for example, to make the service more profitable. In short, Hyperloop will allow long distance travel to be made faster, safer, cheaper, immune to the climate and more sustainable than airplanes, cars or trains.
Please help a brother out I will give Brainliest
You may see this symbol at many public locations (including restaurants, hotels, etc.) that indicates the establishment has wireless internet available. What must the public establishment have in order for you to receive the signal on your laptop computer?
A)
A radio which can receive fm transmissions.
B)
A device to transmit the radio signals over a short distance.
C)
A large radio tower attached to the top of the establishment.
D)
Fiber optics cables that can be directly attached to your computer.
Your answer is B. Hope this helps! -John
How many neutrons does element x have if it's atomic number is 27 and it's mass number is 74
Atomic number=Proton count
Atomic mass=Proton count+ neutron count
Neuton Count=Atomic mass-Proton count
Proton count=Atomic number=27
Mass number=74
Neuton count= 74-27=47
genes can be turned on or turned off not all genes are active at one time true or false
The answer for your question is true
Answer: True
Explanation:
Genes can be turned off and turned on based on the body function. The switching on and off of genes is a continuous process which takes place life long.
This turning off and on of genes is known as gene regulation which is responsible when the genes will be on and when the genes will be off.
The DNA in same it is the functional gene which makes the cell different. Hence, the given statement is True.
Can someone please help me with this question? ASAP thank you!
waters falling. it gets u stuck inside
wind blowing. makes u feel freezing
hope this helped
A 2kg Book is sitting on a table.a 10n Force is pulling to the right.a 3n Force is pulling to the left what is the net force acting on the book?
If 2 objects have the same momentum which statement is true
A: They both have the same velocity
B: The product mass X velocity is the same for both
C: They both have the same mass
D: Mass and velocity are the same for both
The correct answer is B
Answer:
correct answer is option B(The product mass X velocity is the same for both)
Explanation:
Momentum:
momentum of a body is defined as the product of mass and velocity with which body is moving.
Momentum of a body of mass m and which is moving with velocity v is given as
[tex]p=m\times v[/tex]
if two bodies have same momentum it means the product of mass and velocity is same for both.
If two bodies have dfferent masses and if they are moving with different velocities then also they may have same momentum.
for example,
first body has mass 4kg and it is moving with 10m/s velocity
then its momentum is [tex]p_{1} =4kg\times 10ms^{-1}[/tex]
[tex]p_{1} =40kgms^{-1}[/tex]
similarly if second body has mass 2kg and if it is moving with 20m/s velocity
then its momentum is [tex]p_{2} =2kg\times 20ms^{-1}[/tex]
[tex]p_{2} =40kgms^{-1}[/tex]
What causes a star to shine brightly
Mimiwhatsup Answers: Deep inside the core of the Sun, enough protons can collide into each other with enough speed that they stick together to form a helium nucleus.
A star shines brightly due to nuclear fusion in its core, where the energy moves outward and radiates as light. Colors of stars relate to their temperature and size, and outburst events can significantly increase a star's shine. Gravitational lensing observed by telescopes can make stars appear brighter without an intrinsic change.
The cause of a star's bright shine is the nuclear fusion happening in its core. This process releases tremendous amounts of energy as the star's gravity pulls matter inward, causing the core's temperature and pressure to rise until fusion occurs. The energy produced by fusion then pushes outward, ultimately reaching the surface of the star and radiating into space as light, which we see as the star shining.
Stars shine in a variety of colors, which relate to their temperatures and sizes, where a blue star is typically hotter than a red star. However, the brightest shine of a star is observed when there are outburst events, such as a star engulfing a companion, which can greatly amplify its intrinsic brightness, like in the case of V838 Monocerotis.
Furthermore, gravitational lensing, which is observed by telescopes like Hubble, can also cause stars to appear to brighten. Though in this case, the star itself doesn't change intrinsic brightness, but rather the path of its light is altered to make it appear brighter from our perspective.
SCIENCE NEWTONS LAWS 20 POINTS FOR ANSWERING PLZZZ
how are newtons second and third laws of motion important to your everyday life?
Hello!
To answer this question we need to understand what Newton's Second and Third Laws of Motion are!
Second Law- States the accerlation of an object is dependent on two variables, the net force acting upon the object and the mass of the object.
Third Law- States that for ever action, there is an eual and opposite reaction.
The second law is important to our everyday life, because when you try to push something, it's easier for us to push it with a lighter mass. For example pushing an empty box is easier than pushing a full one. Same principal goes for a lot things in our daily life.
The third law is important to our everyday life, because action-reaction pairs affect everything in our life. One of the best examples of this can be see in human body movements!
Hope this helps you with your question.
Explain why nuclear fission and nuclear fusion release large amounts of energy.
Both fission and fusion are nuclear reactions that produce energy, but the applications are not the same. Fission is the splitting of a heavy, unstable nucleus into two lighter nuclei, and fusion is the process where two light nuclei combine together releasing vast amounts of energy.
(On edge) Sample Response: In nuclear fission, the mass of the original nucleus is greater than the mass of the products. The extra mass is converted to energy. In nuclear fusion, the total binding energy of the lighter nuclei is greater than the binding energy of the heavier nucleus. Extra energy is released during the reaction.
Which activity is the best example of cardiovascular and strength training exercises work together
it got to be jumping jacks that all i got
Answer:
Construction tasks.Explanation:
A common activities where cardiovascular and strength training are together is during Construction tasks. In this context, aerobic and anaerobic exercises are present.
The angle between the incident ray and the surface of a plane mirror is 20'. What is the total angle rotated by the incident ray?
I don't understand the question. Needing an explanation.
Angle made by the light ray with the surface of mirror is given as
[tex]\theta_i = 90 - 20 = 70 [/tex]degree
now as we know as per law of reflection that
angle of incidence = angle of reflection
So here we can say that
[tex]\theta_i = \theta_r[/tex]
[tex]\theta_r = 70 degree[/tex]
now the total angle that reflected ray will rotate with respect to incident ray is known as angle of deviation
[tex]\delta =180 - \theta_i - \theta_r[/tex]
[tex]\delta = 180 - 70 - 70 = 40 degree[/tex]
so here reflected light will deviate by total angle of 40 degree fron its incident ray.
What is the most important reason that caffeine (C8H10N4O2) has a lower melting point than copper (II) chloride (CuCl2)?
A. The intermolecular forces holding the caffeine molecules together are weaker than the ionic bonds in CuCl2.
B. The heavy caffeine molecules are more likely to fall apart than the lighter CuCl2 molecules.
C. The metallic bonds in copper chloride are stronger than the ionic bonds in caffeine.
D. Caffeine is a network solid and has a low melting point like other network solids.
Option-A " The intermolecular forces holding the caffeine molecules together are weaker than the ionic bonds in CuCl₂ ".
Explanation:There are two types of interactions among the atoms and molecules. One are known as intramolecular forces while the other are known as intermolecular forces.
Examples of Intramolecular forces are ionic bonds and covalent bonds e.t.c. while examples of intermolecular forces are hydrogen bond interactions, dipole-dipole interactions e.t.c.
Remember that intramolecular forces ar far more greater in strength than the intermolecular forces. Hence, in given statement the interactions between Caffeine molecules are intermolecular forces while, that between Cu and Cl ions in CuCl₂ are intramolecular forces.
Final answer:
The lower melting point of caffeine compared to copper (II) chloride is due to the weaker intermolecular forces in caffeine as opposed to the stronger ionic bonds in CuCl2.
Explanation:
The most important reason caffeine (C8H10N4O2) has a lower melting point than copper (II) chloride (CuCl2) is that the intermolecular forces holding the caffeine molecules together are weaker than the ionic bonds in CuCl2. Option A correctly identifies that caffeine, being a covalent molecular compound, is held together by intermolecular forces which are generally less strong than the ionic bonds found in ionic compounds like CuCl2.
This is due to the fact that ionic bonds result from the electrostatic attraction between ions of opposite charge, which is a significantly stronger force than that of the intermolecular forces present in molecular compounds like caffeine.
A 747 jetliner lands and begins to slow to a stop as it moves along the runway. If its mass is 3,50*10^5kg, its speed is 75.0m/s, and the net braking force is 7.25*10^5N, (a) what is its speed 10.0s later? (b) How far has it traveled in this time?
a)
F = net braking force acting on jetliner = - 7.25 x 10⁵ N (the negative sign indicates that the braking force acts to slow down the motion.)
m = mass of the jetliner = 3.50 x 10⁵ N
a = acceleration of the jetliner
acceleration of the jetliner is given as
a = F/m
a = (- 7.25 x 10⁵)/(3.50 x 10⁵)
a = - 2.1 m/s²
t = time interval = 10 s
v₀ = initial velocity of jetliner = 75 m/s
v = final velocity after time "t" = ?
Using the kinematics equation
v = v₀ + at
v = 75 + (- 2.1) (10)
v = 54 m/s
b)
x = distance traveled in time "t"
using the kinematics equation
x = v₀ t + (0.5) at²
inserting the values
x = (75) (10) + (0.5) (- 2.1) (10)²
x = 645 m
This Physics question relates to Newton's second law of motion and the principles of linear motion. By utilizing the given data and appropriate formulas, we can find the final speed of the plane after 10 seconds and the distance traveled during this time.
Explanation:This question is related to Newton's second law of motion which states that force is equal to mass times acceleration. Given the mass (m) of the airplane as 3.50*10^5 kg, the braking force (F) as 7.25*10^5N and the initial speed (u) as 75.0 m/s, we can find acceleration (a) by using the formula: F=ma, thus a=F/m. The negative sign indicates that the plane is slowing down.
(a) To find the final speed (v) of the airplane after 10.0 sec, you use the formula v = u + at. Here, t is 10.0 sec. Substituting the values, we determine the final speed.
(b) The distance travelled can be found using the formula: s = ut + 0.5at^2. We know all the values so we can substitute them in to find the distance. Thus, by substitifying we get the distance traveled during this time period.
Learn more about Newton's Second Law here:https://brainly.com/question/13447525
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Name three types of energy associated with the microwave.
I'm assuming that you're referring to a microwave oven in the kitchen.
-- electrical energy, which it takes from the wall outlet and uses to do its job
-- radio waves, in the form of microwaves at 2.45 GHz, with which it fills the chamber in which the cold meatloaf is placed to warm
-- heat (thermal) energy, which develops inside the food, when meatloaf molecules resonate with the 2.45 GHz microwaves
-- BONUS: visible light energy, if there's a little light bulb inside to let you see the meatloaf as it warms up
If gold costs 300$ how any millimeters on aside does a 10,000$ cube of gold measure?
Answer:
Side of cube = 24 mm
Explanation:
Usually gold price is represented for 8 g of gold = 300$
Density of gold = 19.32 [tex]g/cm^3[/tex]
Mass of gold for 10000$ = (10000/300)*8 = 266.67 g
We have density = Mass/ Volume
So volume = Mass/density = 266.67/19.32 = 13.80 [tex]cm^3[/tex] = 138000 [tex]mm^3[/tex]
Volume of cube of gold = [tex]a^3[/tex], where a is the side of cube,
So side of cube , a = [tex]\sqrt[3]{138000} =23.99 mm = 24 mm[/tex]
A gold bar has a volume of 4.7 cm3 and a density of 19.3 g/ cm3. What is its mass?
Answer:
Mass of the gold bar is 90.71 gram.
Explanation:
Given:
volume = 4.7 [tex]cm^{3}[/tex]
density = 19.3 [tex]\frac{g}{cm^{3}}[/tex]
To find:
mass = ?
Formula used:
density = [tex]\frac{mass}{volume}[/tex]
Solution:
density is given by,
density = [tex]\frac{mass}{volume}[/tex]
mass = volume × density
mass = 4.7 × 19.3
mass = 90.71 g
Mass of the gold bar is 90.71 gram.
A 480N sphere 40.0cm in radius rolls without slipping 1200cm down a ramp that is inclined at 53 0 with the horizontal. What is the angular speed of the sphere at the bottom of the slope if it starts from rest?
As we know that sphere roll without slipping so there is no loss of energy in this case
so here we can say that total energy is conserved
Initial Kinetic energy + initial potential energy = final kinetic energy + final potential energy
[tex]\frac{1}{2}mv_i^2 + mgh = \frac{1}{2}mv^2 + \frac{1}{2}I\omega^2+ mgh'[/tex]
as we know that ball start from rest
[tex]v_i = 0[/tex]
height of the ball initially is given as
[tex]h = Lsin\theta[/tex]
[tex]h = 1200sin53 = 960 cm[/tex]
also we know that
[tex]I = \frac{2}{5}mR^2[/tex]
also for pure rolling
[tex]v = r\omega[/tex]
also we know that
[tex]480 = m*9.8 [/tex]
[tex]m = 49 kg[/tex]
now plug in all data in above equation
[tex]480*9.60 + 0 = \frac{1}{2}*49*(0.40*\omega)^2 + \frac{1}{2}*\frac{2}{5}*49*(0.40)^2\omega^2 + 0[/tex]
[tex]4608 = 3.92\omega^2 + 1.568\omega^2[/tex]
[tex]\omega^2 = 839.65[/tex]
[tex]\omega = 29 rad/s[/tex]
So speed at the bottom of the inclined plane will be 29 rad/s
I need Science Experiment ideas! I am in 8th grade and I have to do a Science experiment on whatever I want but I can’t think of anything
What causes the water in the blue currents to sink?
Answer:
The difference of densities is what cause the sinking of the cold water.Explanation:
The ocean encloses a certain water activity, creating the Global Conveyor Belt, which is about the thermohaline circulation, which is a system of currents.
The Global Conveyor Belt is crucial to maintain nutrients and carbon dioxide cycles. There we have warm water and cold water, each contain different percentage of salt and other minerals. Basically, the cold water tend to sink under the warm water which has more salt and more ability to absorb heat. This sinking of the cold water is due to the difference of densities, warm water is less dense that cold water, and according to physics, less dense fluids float over denser fluids.
So, basically the difference of densities is what cause the sinking of the cold water.
An eagle carry a trout flies above a lake along a horizontal path. The eagle drops the trout from a height of 6.1m. The fish travels7.9 m horizontally before hitting the water. What is the velocity of the eagle?
Answer:
Velocity of the eagle = 7.08 m/s
Explanation:
We have equation of motion , [tex]s= ut+\frac{1}{2} at^2[/tex], s is the displacement, u is the initial velocity, a is the acceleration and t is the time.
Vertical motion of fish:
Initial velocity = 0 m/s , acceleration = acceleration due to gravity = [tex]9.8m/s^2[/tex], displacement = 6.1 m we need to find time.
[tex]6.1= 0*t+\frac{1}{2} *9.8*t^2\\ \\ 4.9t^2=6.1\\ \\ t=1.116 seconds[/tex]
Horizontal motion of fish:
Acceleration = acceleration due to gravity = [tex]0m/s^2[/tex], displacement = 7.9 m , time = 1.116 seconds we need to find Initial velocity (u).
[tex]7.9= u*1.116+\frac{1}{2} *0*1.116^2\\ \\ u=7.08m/s[/tex]
So, velocity of the eagle = 7.08 m/s
Answer:
7.1
Explanation:
did endgenuity, said it's correct
(explanation above is correct, also)
suppose a child walks from the outer edge of a rotating Merry-Go-Round to the inside does angular velocity of the Merry-Go-Round increase decrease or remain the same
Okay here initially child walks on the outer edge of the disc and then started to move inside
So here as the child and Merry go round is an isolated system so there is no external Torque on this system from outside
As here we can see there is external force acting on this system by the hinge of the Merry go round as well as due to gravity so we can not use momentum conservation to solve such type of questions.
But as we can say that there is no external torque on this system about the hinge point so we will use conservation of angular momentum for this system
Here as we know that
[tex]\tau = \frac{dL}{dt}[/tex]
where L = angular momentum
since here torque is ZERO
[tex]0 = \frac{dL}{dt}[/tex]
L = constant
so here we can write initial angular momentum of the system as
[tex]L = (I_1 + I_2)*\omega[/tex]
here we know that
[tex]I_1 [/tex] = moment of inertia of merry go round
[tex]I_2 [/tex] = moment of inertia of child
so here we can say
[tex](I_1 + I_2)* \omega_1 = (I_1 + I_2')\omega_2[/tex]
so here as the child moves from edge to inside the disc it moment of inertia will decrease because as we know that moment of inertia of child is given as
[tex]I_2 = mr^2[/tex]
here m = mass of child
r = distance of child from center
Since child is moving inside so his distance from center is decreasing
so here moment of inertia of child is decreasing as he starts moving inside
so final angular speed of merry go round will increase as child go inside
[tex]\omega_2 = \frac{(I_1 + I_2)*\omega}{(I_1 + I_2')}[/tex]
so here as
[tex]I_2' < I_2[/tex]
final angular speed will be more than initial speed as child moves inside
study the motion map shown. what do the circled vectors represent?
a. velocity
b. speed
c. positive acceleration
d. negative acceleration
Answer:
It's option d - Negative acceleration
Explanation:
Let's start by demonstrate why it's not option b - Speed : Speed is a scalar quantity so it can not be represented by a vectorLet's check that the green vectors represent velocity (velocity is a vector quantity, velocity is a direction aware, while speed is just a scalar)Now let's show that the circled vectors are acceleration vectors:Mathematically position X , velocity V and acceleration A are:
[tex] \frac{dX}{dt} = V [/tex] and [tex] \frac{dV}{dt} = A [/tex]
Where X, V, A are vectors and [tex] \frac{d(a)}{dt} = b [/tex] indicates the derivate a of a time is equal to b.
So, this show that acceleration is a rate respect of time of velocity ⇒ When acceleration is positive, velocity increments, when acceleration is negative, velocity decrements.
The above explanation correspond to the motion map shown, getting demonstrated that the answer is D - Negative acceleration
The answer is:
Acceleration