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Lithium sulfide is a compound and the atoms are held together by bonds.

Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.

Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:

1)Molecular compounds where in atoms are joined by covalent bonds.

2) ionic compounds where atoms are joined by ionic bond.

3)Inter-metallic compounds where atoms are held by metallic bonds

4) co-ordination complexes where atoms are held by co-ordinate bonds.

They have a unique chemical structure held together by chemical bonds Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.

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Answer:

Answer is given in this paper.

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Answer:

Distance: 17 km

Displacement: 7 km

Explanation:

The distance is the total measure of how much he moved.

The displacement is the straight line between the star point and the end point

Answer:

Explanation:

Distance traveled = steady speed * time duration = 8m/sec * 8 sec = 64 meters

Answer:

64 m

Explanation:

Multiply 8 m by 8.

Answer:

Answer in Observational evidence (b)

The evidence needed to formulate a hypothesis is observational evidence. From keen observations, we are formulating a scientific hypothesis.

Hypothesis is a plausible scientific statement which predicts a process or result of an experiment based on observations. Hypothesis can be made from well established scientific records also.

Some are formulating hypothesis based on some intuitions, while some others are formulated based on inductions or  deductions. An experiment starts from a clear cut hypothesis.

A hypothesis must be testable, falsifiable. A scientific hypothesis must be based on a strict observation and for a considerable time and the observations must support for the statement derived for the solution.

Hence, the evidence is needed for a or a hypothesis to be supported or not supported is observational evidence.

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Respuesta:En la astenosfera existen lentos movimientos de convección que explican la deriva continental. Además, el basalto de la astenosfera fluye por extrusión a lo largo de las dorsales oceánicas, lo cual hace que se renueve y expanda constantemente el fondo oceánico. :D

Answer:

½mv²=mgh

g=½(V²/h)

Explanation:

When an object is held at a height, it posses gravitational potential energy which is mgh, where m= mass, h=height, g=acceleration due gravity

When the object is dropped, the potential energy will be converted to kinetic energy which is ½mv², where V=velocity at which the object moves.

V=∆h/t, ∆h is change in height with respect to time.

½mv²=mgh

Mass cancel out,

g=v²/2h

This implies that g does not depend or is not affected by mass. Hence heavy object and light object will reach the ground at the same time when dropped from the same height. When air resistance is negligible.

Answer:

733.9× 2.4

1761.36

Explanation:

The airplane refuels between city A and continues on to city B. It travels at an average speed of 733.9km/h. If the trip takes 2.4 hours, what is the flight distance between city A and city B?

Answer:

Density is defined as mass per unit volume. Hence its SI unit is: kg/m3

Explanation:

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Potential energy converts kinetic energy when the range is shifting from the S pole to the N pole.

If you like, I can put in more detail!

[tex]\\ \rm\hookrightarrow 1250000g=1250kg[/tex]

[tex]\\ \rm\hookrightarrow Force=Mass(Acceleration)[/tex]

[tex]\\ \rm\hookrightarrow Force=1250(10)[/tex]

[tex]\\ \rm\hookrightarrow Force=12500N[/tex]

The weight of the car that has a mass of 1250000 g would be 12262.5 N

Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum.The mathematical expression for Newton's second law is as follows

F = m*a

where F represents the force applied

m is the mass of the object and a is the acceleration of the object .

The major difference between the mass and the weight of an object is that mass of the object is constant throughout the universe while the way it can vary from the positional situation of the object in the universe for example the weight of the weight of the object in the earth would be different than the weight of the same object in some other planet for example The weight of an object  on the Mars would be different than earth.

The weight of any object use the multiplication of the mass and the gravity of the respective planet in our case the weight is measured with respect to the gravity of the earth

Weight = Mass*(acceleration due to gravity)

W= m*g

The value of g for the earth is 9.81 m/s²

As per the given problem the  car that has a mass of 1250000 g

1000 g = 1 kg

1250000 = 1250 kg

Weight = 1250*9.81

            =12262.5 N

Thus ,the weight of the car that has a mass of 1250000 g would be 12262.5 N

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Answer:

How did life begin on earth?

Explanation:

this is an example of a question that cannot be solved or why do we sleep too cannot be solved

Answer:

How did life on earth originate?

Explanation:

While there are many views on how life on earth started, especially from a religious stand point, scientists think this idea is "irrational". This is probably because it doesn't make sense how a higher power could create everything that we see on earth today from nothing. While they have tried to create simulations on how life could have possibly formed, they have gotten no answer.

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Answer:

the correct answer is

"SH"

hope it helps

have a great day ahead :)

The sulfhydryl functional group is shown by -SH.

The sulfhydryl functional group is known by several other names such as; thiol, mercapto or sulfanyl.

The sulfhydryl functional group has the structure -SH. The sulphur atom bears two lone pairs which is also important in studying the chemistry of this functional group.

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Answer:

a force that acts on a body moving in a circular path and is directed towards the centre around which the body is moving.

Answer:

A centripetal force is a force that makes a body follow a curved path. Its direction is always orthogonal to the motion of the body and towards the fixed point of the instantaneous center of curvature of the path.

Explanation:

molecular formula consists of the chemical symbols for the constituent elements followed by numeric subscripts describing the number of atoms of each element present in the molecule. The empirical formula represents the simplest whole-integer ratio of atoms in a compound.

Answer:

The symbollic representation of a molecule of an element or a compound present in a molecule is called molecular formula.

For example: molecular formula of sodium chloride is NaCl.

We have that  the ball after it has been thrown out of parachute is

[tex]V_t=24ms^{-1}[/tex]

From the Question we are told

Parachute Speed [tex]v= 20ms^-1[/tex]

Ball Speed [tex]v= 4ms^{-1}[/tex]

Generally the equation for the resultant speed of the ball  is mathematically given as

[tex]V_t=V_1+v_2\\\\v_t=20+4[/tex]

[tex]V_t=24ms^{-1}[/tex]

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Answer:

Air pressure or atmospheric pressure is the pressure as the force exerted by the collisions of particles in the air. The key difference between air pressure and liquid pressure is that air pressure allows the gaseous state of matter to be compressible, whereas liquid pressure makes a liquid incompressible

Explanation:

Air pressure or atmospheric pressure is the pressure as the force exerted by the collisions of particles in the air. The key difference between air pressure and liquid pressure is that air pressure allows the gaseous state of matter to be compressible, whereas liquid pressure makes a liquid incompressible

Answer:

Yes

Explanation:

Any planet with a sufficiently dense atmosphere that lies in the path of the solar wind will have aurora. It has been discoveres in planets like Jupiter, Saturn, etc.

Answer:

yes

Explanation:

We have that the amount of the charge q is

[tex]q=1.8*10^{-7}[/tex]

From the Question we are told that

Force [tex]F=7.89 x*10^{-7}[/tex]

Velocity [tex]V=2090m/s[/tex]

Angle [tex]\theta=29.4[/tex]

Magnetic field [tex]B=4.23 * 10^{-3} T[/tex]

Generally, the equation for Force F is mathematically given by

[tex]F=qVBsin\theta\\\\q=\frac{F}{VBsin\theta}[/tex]

[tex]q=\frac{7.89 x*10^{-7}}{4.23 * 10^{-3} T*sin29.4*2090m/s}[/tex]

[tex]q=1.8*10^{-7}[/tex]

In conclusion

The amount of the charge q is

[tex]q=1.8*10^{-7}[/tex]

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From the question, the given charge moving within the magnetic field would have a value of 1.82 x [tex]10^{-7}[/tex] C.

A charge is either a positively or negatively charged particle. When a charge is moving through a magnetic field, it would experience a force which depends on the amount of the charge, its speed, the magnetic field strength and angle. The force on a charge in a magnetic field can be determined by:

F = qvBSin θ

where: q is the charge, v is its velocity/ speed in the field and θ is the angle of deflection of the charge.

Given that: F = 7.89 x [tex]10^{-7}[/tex] N, v = 2090 m/s, B = 4.23 x [tex]10^{-3}[/tex] T and θ = 29.4°.

Thus, the amount of the charge can be determined by;

q = [tex]\frac{F}{vBsin O}[/tex]

  = [tex]\frac{7.89*10^{-7} }{2090*4.23*10^{-3}* Sin 29.4 }[/tex]

  = [tex]\frac{7.89*10^{-7} }{4.340}[/tex]

q = 1.818 x [tex]10^{-7}[/tex]

q = 1.82 x [tex]10^{-7}[/tex] C

Therefore, the amount of the charge that moved within the magnetic field is 1.82 x [tex]10^{-7}[/tex] C.

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Answer:

when you push up and down the pencil right in the middle of the water tank. it will produce ripples. If seen at the perfect angle you will observe the waves

Explanation:

Answer:

Effort×Effort distance = load× load distance

Answer:

Renaissance scientist

Answer:

Explanation: is that suppose to be the question or are you just saying?

Answer:

metalloids

Explanation:

Periodic Table

A Periodic table is an arrangement of chemical elements in order of increasing atomic number.

Metalloids:  Metalloids have properties that are midway between metals and non metals

Tellurium is a chemical element with symbol Te and atomic number 52. Classified as a metalloid, tellurium is a solid at room temperature.

Properties

Atomic Mass

127.6u

Oxidation States

+6, +4, -2

Year Discovered

1782

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Answer:

[tex]momentum \: is \: the \: force \: or \: speed \: of \: the \: movement \\ equation \\ momentum = mass \times change \: in \: velocity \\ thank \: you[/tex]