The density of solid crystalline molybdenum crystallized with a body-centered cubic unit cell is 9.59 g/cm³.
What is Molybdenum crystallizes?A kind of molybdenum disulfide, or MoS2, is called molybdenite. Molybdenite, which resembles graphite in both appearance and feel, has a lubricating effect as a result of its layered structure. A layer of molybdenum atoms is sandwiched between two sheets of sulphur atoms in the atomic structure. Although the Mo-S interactions are strong, there is no contact between the sulphur atoms at the top and bottom of the two sandwich-like tri-layers, which makes slippage and cleavage planes simple to form. Both the common polytype 2H of molybdenite and the 3R polytype of molybdenite form in the hexagonal crystal structure.
a = edge length = 4r/√3 = 4 * 139/√3 = 321.006pm
density d = 2m/a³NA = 2* 95.54/(321.006)³(NA)
= 5.776 * 10²³
= 5.776 * 10²⁴/ 6.023 * 10²³
= 9.59 g/ cm³
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motion observed from a particular frame of reference is
Answer:
one in which the motion of a particle not subject to forces is in a straight line at constant speed
Explanation:
I searched this on the internet
An electrical device is listed as 3,000 watts. approximately how many horsepower is this?
By unit conversion, the power is 4.023 HP.
We need to know about unit conversion to solve this problem. The unit conversion can be used to convert a unit to another unit. It can be defined as
a = xb
where a is unit a, b is unit b and x is the constant of conversion.
From the question above, we know that
P = 3000 watts
unit conversion
(1 HP = 745.7 watts)
Convert the unit conversion
1 HP = 745.7 watts
divide by 745.7
1/745.7 HP = 1 watts
Convert the aspirin power to horsepower
P = 3000 watts
P = 3000 x 1/745.7 HP
P = 3000/745.7 HP
P = 4.023 HP
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A boat travels 6 m/s across a river. The current pushes downstream at 8 m/s. If the river is 104 m wide, then:
A ball is thrown upward at time t=0 from the ground with an initial velocity of 18 m/s (~ 40 mph). what is the total time it is in the air? assume that g = 10 m/s2.
The total time it is in the air for the ball is 3.672 s
Given:
Initial velocity = 18 m/s
We have to find the total time the ball is in the air.
By using the formula, we get,
t = v - u/a
Where t = time to reach the maximum height
v = final velocity of the ball = 0 m/s
u = initial velocity of ball = 18 m/s
a = acceleration due to gravity = -9.8
Acceleration of gravity is taken as negative because the ball is moving in the opposite direction.
t = 0 - 8/-9.8
t = 1.836 sec
Thus, time is taken by the ball to reach the ground again = time taken to reach the maximum height
So, the Total time required for the ball to reach the ground = 2t = 2 × 1.836
Total time required for the ball to reach the ground = 3.672 s
Hence, the total time it is in the air for the ball is 3.672 sec.
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Which requires more work, lifting a 25-kg bag of cement 10 m vertically, or lifting a 50-kg bag 5 m vertically?
The work done required to raise a 50-kilogram bag 5 meters vertically vs a 25 kg bag of cement is the same.
Work done in lifting 25 kg by 10 m vertically
⇒ [tex]w_{1} = f_{1} d_{1}[/tex]
[tex]= (m_{1} g)d_{1}[/tex]
= 25 × 9.8 × 10 J
= 2450 J
Work done in lifting 50 kg by 5 m vertically
[tex]w_{2} = f_{2} d_{2}[/tex]
[tex]= (m_{2} g)d_{2}[/tex]
= 50 × 9.8 × 5
= 2450 J
Here, both are the same.
The product of an object's displacement and the issue of the carried out force this is directed inside the direction of the object's displacement is called the paintings done via a pressure.
The vertical motion has no effect and is 0. best the horizontal component is protected for computations for the reason that object travels horizontally. As a result, the vertical component of the pressure does no longer work.
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At a certain temperature, the phph of a neutral solution is 7.68. what is the value of kwkwk_w at that temperature?
Kw = 4.36×10^-16 is the value of kw at temperature when the ph of a neutral solution is 7.68.
The formula for Kw is:
Kw= [H]*[OH]
where [H] and [OH] are concentrations
We are given the pH so we can calculate the [H] concentration from the formula:
pH=-log[H]
[tex]P_{H} =-log_{10} [H^{+} (aq)][/tex]
[tex]-P_{H} =log_{10} [H^{+} (aq)][/tex]
[tex][H^{+} (aq)]=10^{-P_{H} }[/tex]
[tex][H^{+} (aq)]=10^{-7.68}[/tex]
[tex][H^{+}(aq) ]=[/tex]2.089×[tex]10^{-8}[/tex]mol [tex]dm^{-3}[/tex]
In neutral solution, [H] = [OH],
therefore: [OH]=2.089×10^-8M
Calculating Kw:
Kw = (2.089×10^-8M) *(2.089×10^-8M)
Kw = 4.36×10^-16
What is the pH of a neutral solution at 100 degrees Celsius, where equals?pH + pOH = 14.00 (at 25°C) for any neutral solution with pH=pOH=7. At 100°C, the kw for water is 4.991013. Determine the pKw of water at this temperature, as well as the pH and pOH of a neutral aqueous solution at 100°C. pH and pOH values should be reported to two decimal places.To learn more about value of kw refer to
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3.if kiis 44 nm for (-)d9-thc and 4350 nm for cbd what is the binding free energy difference, in kj/mol?
The correct answer is 0.00981 kJ/mol.
Every object we encounter has a binding force, and the energy that holds them together is the binding energy. The binding energy is the least amount of energy necessary to remove an electron, proton, or neutron from the nucleus. A nucleus contains electrons and protons that are strongly bound by energy.
Free energy of binding can be calculated using formula, Gbinding = dE coluombic + dEvdw + dGhyd. -TdS where Evdw+Ecoulombic is protein ligand interaction, dGhyd is change in hydration energy.
dS is entropy. dG hydration is Gpolar+Gnon polar. Inhibition constants are given for CBD and
THC = 4350nm, and 44nM. So,
dG = Ki + Ki' = 44+4350 = 4394 and
in kJ/mol = NahC/4394 = (6.022x10^23x6.626x10^-34x3x10^8)/4394 = 0.00981 kJ/mol
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REALLY NEED HELP, DUE TODAY!!!
1. How will an object at rest be affected if multiple forces working on it are opposed but unbalanced?
Motion will either be created, stopped, or changed.
The acceleration of the object will increase
The unbalanced forces will cause the object to produce a humming sound
The mass of the object will decrease.
2. A blue car weighing 1,302 kg is accelerating forward at a rate of 4 m/s2. What is the forward force of the car?
325.5 N
1,298 N
1,306 N
5,208 N
3. Two people collide on a busy city street. What information is needed to calculate the force one of the people exerts on the other person?
The velocity of each person
The speed of each person
The mass and acceleration of each person
The location of the collision
4. (don't need)
5. Two bowling balls of different masses collide while accelerating at 1.875 m/s2. The first ball, rolling to the right, weighs 7 kg. The second ball, rolling to the left, weighs 4 kg. What force does the bowling ball weighing 7 kg exert on the bowling ball weighing 4 kg?
8.875 N to the right
3.73 N to the left
7.5 N to the left
13.125 N to the right
Answer:
1.An object at rest has zero velocity - and (in the absence of an unbalanced force) will remain with a zero velocity. Such an object will not change its state of motion (i.e., velocity) unless acted upon by an unbalanced force.
3.Let speed of balls are v
1
and v
2
.
There is no external force acting, momentum will be conserved.
m
1
u
1
+m
2
u
2
=m
1
v
1
+m
2
v
2
⇒m×6−m×6=mv
1
+mv
2
⇒v
1
=−v
2
Coefficient , e=−
u
1
−u
2
v
1
−v
2
⇒
3
1
=−
6+6
v
1
−v
2
⇒v
1
=−2m/sWhen two objects with the same mass collide, Newton's laws tell us that they will accelerate the same amount but in opposite directions.
Collision Forces - 5/5
1. A) Motion will be either created, stopped or changed.
2. D) 5,208 N
3. B) the mass and acceleration of each person
4. C) balanced forces
5. B) 13.125 N to the right
Hope this helps ya out peeps!
How many grams of baking soda are in a 25.5 kg bag?
If a person practicing yoga for one hour burns 285 kilocalories (kcal), how many joules (j) of energy have they burned?
The person that practicing yoga for one hour burns 285 kilocalories (kcal) burned: 1192440 j of energy
To solve this problem the we have to do the conversion of units with the given information.
Information about the problem:
energy =285 kilocalories (kcal)energy expressed in joules (j) = ?1 kilocalorie (kcal)= 4184 joules (j)By converting the energy units from kilocalories (kcal) to joules (j) we have:
energy =285 kcal * 4184 j/ 1 kcal
energy = 1192440 j
What is unit conversion?It is the transformation of a value expressed in one unit of measurement into an equivalent value expressed in another unit of measurement of the same nature.
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A sample of matter, either a single element or a single compound, that has definite chemical and physical properties.
A sample of matter, either a single element or a single compound, that has definite chemical and physical properties: is an atom
An atom is the smallest unit of an element that still retains the distinctive behavior and definite chemical and physical properties of the element.
A single atom of an element keep its distinctive behavior, that's because the atom is the smallest unit of the composition of matter
What is an atom?The atom is the smallest part of the composition of matter, it is indivisible and is composed of a nucleus that has protons and neutrons, and around the nucleus there are the electrons.
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) suppose that you traveled to a planet with 4 times the mass and 4 times the diameter of earth. would you weight more or less on that planet than on earth? by what factor?
The weight of ourselves on the new planet will reduce by 1/4 factor.
What is gravitational acceleration?We know that each body attracts another body, Now if we free fall on any planet then the natural acceleration or acceleration due to gravity force is called gravitation acceleration.
The gravitation acceleration is given by,
g = GM/R²
Where G is constant while M is the mass of the planet and R is the radius of that planet.
The value of g or gravitational acceleration for the earth is 9.81 m/sec².
Given that the new planet has a mass of 4 times then earth and diameter is also 4 times.
Since gravitation acceleration of earth ;
g = GM/R²
Since the diameter is 4 times so radius will also 4 times.
New planet acceleration ;
g' = G(4M)/(4R)²
g' = 4/16(GM/R²)
g' = 1/4(g)
Hence "The weight of ourselves on the new planet will reduce by 1/4 factor".
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Where in your body do you feel Courage and Why?
(With Explanation)
PLEASE ANSWER IT CORRECTLY I REALLY NEED IT NOW
I'm Giving 15 points
If you look at courage and if you look at the brain, there is one particular brain structure that plays a very important role when it comes to courage and your own performance. This part of the brain is called the amygdala. The amygdala is a brain structure that is very small, and we have two of them, one of the left side of the brain, one on the right side of the brain. They’re very small and look like an almond. Amygdala is also the Latin word for almond. Even though they are small, they amygdala is also extremely powerful. It plays a very important role in our survival. Whenever there is a real danger outside, it will trigger a fight, flight or freeze response, so you will fight danger, run away, or just be blocked in your own emotions, you will freeze, perhaps you will hide. The amygdala is very important for our survival and for many emotions in general, but in many situations, the amygdala will also become active when there is no real danger, for example, standing on stage and holding a presentation, leading a difficult conversation. These are two examples where there’s no real danger, but nevertheless, the amygdala can be triggered and cause this feeling of nervousness and anxiety. It’s these feelings of nervousness, anxiety or insecurity that will also block us in our potential to hold a presentation or to lead a good conversation.
light travels through space at a speed of 3.0 × 108 m/s. a space probe is traveling away from earth at 2.5 × 108 m/s when one of its spotlights is turned on. what speed would an observer on earth measure for the light from the spotlight
The speed of light in a vacuum is the same for all frames of reference.
so "Light travels through space at a speed of 3.0 x 10^8 m/s."
frame of reference is a fixed background surrounding an object, assumed to be at rest and in a fixed positionThe usual frame of reference for the motion of most ordinary objects is the surface of earthn Newtonian physics, all motion must be defined in terms of a reference frame Relative Motionspeed of light is constant in all frame of refrencespeed of light does not change even while change the medium of propagation, be it either denser to lighter or lighter to denserTo know more about frame of reference visit : https://brainly.com/question/1217098
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Explain why capacitance should be inversely proportional to the separation between the plates of a capacitor.
This is thus because voltage divided by distance determines how strong an electric field is. The field is inversely proportional to this spacing at constant voltage.
More charge can flow via a stronger field, increasing capacitance.
Why does capacitance have an inverse relationship with plate separation?In the simplest terms, the closer two items are near one another, the greater the influence; conversely, the further apart they are, the lesser the influence. As a result, capacitance decreases as spacing increases.
The ratio of the quantity of electric charge held on a conductor to an electric potential difference is known as capacitance. Self-capacitance and mutual capacitance are two concepts that are related to one another.
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The electric field at the surface points radially outward and has a magnitude of 8300 n/c. if r1 = 0.5 m, r2 = 1.9 m, and a = 3, find the value of the charge q, in coulombs?
The value of charge in coulombs is 0.9 × 10—⁹ coulombs.
Radius 1 of the surface = 0.5 m
Radius 2 of the sphere = 1.9 m
Area of the surface = 3
The magnitude of the electric field at the surface = 8300 N/C
The electric flux through a surface is,
[tex] Electric \: flux=Electric \: field \: \times area \: of \: the \: surface[/tex]
[tex]Φ = E \times S[/tex]
[tex]Φ = EScosθ[/tex]
[tex]Φ =E \times 4 \times \pi \times r ^{2} [/tex]
According to Gauss, the net electric flux is,
[tex]Net \: electric \: flux = \frac{1}{E _{0} } \times charge \: enclosed[/tex]
[tex]Charge \: enclosed = 4 \times \pi \times E _0 \times a \times r ^{3} [/tex]
[tex] = \frac{1}{9 \times 10 ^{9} } \times 3 \times (1.4) ^{3} [/tex]
[tex] = 0.9 \times 10 ^{ - 9} \: C[/tex]
Therefore, the value of charge in coulombs is 0.9 × 10—⁹ coulombs.
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Which process is accompanied by a decrease in entropy for the system?
a. ethanol condenses
b. water evaporates
c. dry ice sublimes
d. sodium chloride dissolves
The best choice is A. We transition from a gaseous to a liquid state by condensing steam. Entropy declines as unpredictability rises in a liquid transition from a gaseous state.
The degree of disorder in a system is measured by entropy. Disorder refers to the "distance" and "separation" between molecules, particles, etc. Because they have rigid structures as opposed to gases and liquids, which have free structures, solids and crystals have less chaos. Compared to solids and crystalline formations, gases and liquids contain higher levels of chaos. Entropy increases as heat and energy are added, which indicates that disorder is spreading more quickly. Entropy is a measure of how much chaos there is in a system and how rigid and organized it becomes when less heat and energy are contributed.
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Whoever answers in complete sentences first gets brainlies
Answer:
The graph is trying to show a comparison of statistics. In order to fully understand this graph, we need a label for the different colors and sections in the graph and a title for the graph. Without this information, we cannot fully understand what this graph is trying to portray.
Explanation:
hope this helps!
I already did the first slide but it ahs to do with the second one. Please answer in complete sentences
Answer:
huhu
chuba bi miayang yo
trip rp rrip trip
Explanation:
how are things going with your family in the car with the family in because or am we supposed for a car to stay at the airport and get a taxi
Find the lengths of the sides of the triangle pqr. is it a right triangle? is it an isosceles triangle?
NO, It is an Right Triangle
p(2 , - 1 0) Q ( 4, 1, 1) R( 4, -5, 4)
PQ2 = ( 2 -4)^2 + (-1-1)^2 +( 0-1)^2
PQ^2= (4 + 4 +1 )=9
PQ = 3
QR^2 = ( 4 - 4)^2 + ( 1 +5)^2 + ( 1-4 )^2
= 0 + 36 + 9 =45
QR = √45 =3√5
RP^2 = ( 4-2)^2 + ( -5 +1)^2 + (4-0)^2
= 4 + 16 + 16 = 36
RP = 6
LENGTH OF SIDES ARE 3 ,6 , 3√5
and ajsoPQ^2 + RP^2 = 9 + 36 = 45 =QR^2
PQR is a right angle triangle
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A ball is launched at some angle from horizontal toward a target some distance away on the ground. Neglect any effects due to air resistance. Where would the speed of the ball be the slowest?.
Answer:
at the vertical change
Explanation:
i believe this is right
An object at the origin is acted on by the forces f 1 = 20i - 10j, f2 = 30j 10k, and f3 = 40j 20k. find the magnitude of the combined force, and describe the approximate direction of the force
The correct answer is α=31, β=73.4, γ=64.62.
The magnitude of a force is the measurement or size of the force acting on an object. The amount of the resultant force is the vector sum of the forces acting on the body. There are frequently several forces acting on a body at once. Either they act in unison or in opposition to one another.
Given :
F1 = 20i - 10j,
F2 = 30j + 10k,
and F3 = 40j + 20k.
We need to find the magnitude of the combined forces.
F_net= F_1+F_2+F_3
F_net=20i-10j+30j+10k+40i+20k
F_net=60i+20j+30k
|F_net|=√(20)^2+(60)^2+(30)^2
=√(400+3600+900)
=√4900
=70N
Direction of force=
cos α=F_x/|F_net|=60/70
cos β=F_y/|F_net|=20/70
cos γ=F_z/|F_net|=30/70
α=31
β=73.4
γ=64.62
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at perigee, the moon is 364,000 km from earth. at apogee, it is 407,000 km away. how many times larger does the moon appear to us during perigee than at apogee? the linear diameter of the moon is 3,480 km.
The moon appears 1.1153 during perigee than at apogee.
What is perigee?Perigee is the point at which the moon is nearest to the Earth each month.
The points of apogee and perigee varies throughout the year.
Apogee is the point at which the moon is farthest to the Earth each month.
from the data given,
perigee= 364000km
Apogee= 407000km
diameter= 3480km
p/a = 406,000/364,000
= 1.1153.
Thus, the moon appears 1.1153 during perigee than at apogee.
In conclusion, it has been scientifically found that in periods of four years, lunar perigees and apogees fall on the same or nearly the same calendar dates.
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The speed of a bullet train is measured to be 312.0 mph ± 3.9 mph. What is the percent uncertainty in this measurement?
Answer: 1.3%
The speed of a bullet train is measured to be 312.0 mph ± 3.9 mph. What is the percent uncertainty in this measurement?(1 point) 1.3%
What happens to the width of the central maximum if the wavelength is increased?
The width of central maximum increases if the wavelength is increased.
What is the width of the central maximum?The width of the central maximum is simply the distance between 1st order minima from the center of the screen on both sides. Thus, the central maximum becomes twice as wide if the slit width a becomes half as wide.
How is central maxima affected?For one slit experiment, the size(angular width) of the central maximum is given by a 2 λ a , where a is that the slit width. therefore the width of the central maximum is directly proportional to the wavelength of light and inversely proportional to slit width.
What is central maximum of a wave?A central maximum is that the brightest central zone of a diffraction pattern on the screen. The central maximum has the utmost intensity and widest of all the other diffraction fringes
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Write a differential equation for the concentration of the chemical in the pond at time t. hint: the concentration is c = a/v = a(t)/106
The differential equation for the concentration of the chemical is given by dc/dt = (3/10⁶)(1 - 100c)
Suppose that a(t) is the amount of chemical in the pond at time t.
So, a'(t) = rate of chemical inflow - the rate of chemical outflow.
So, da/dt = (0.01)300 - (a/10⁶)300
So, da/dt = 3 - 3a/10⁴
Now,
Since, c = a/v
Then, c' = a'/v
So, c' = (3 - 3a/10⁴)/10⁶
Or, c' = 3 (1 - a/10⁴)/10⁶
So, dc/dt = 3/10⁶ (1 - cv/10⁴)
So, dc/dt = (3/10⁶) (1 - 100c)
Therefore the differential equation for the concentration of the chemical is dc/dt = (3/10⁶)(1 - 100c)
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A small glass bead has been charged to 1.9 nc. what is the strength of the electric field 2.0 cm from the center of the bead?
The electric field is 42750 N/C.
We need to know about the electric field to solve this problem. The electric field is the area that is affected by electric energy. The magnitude of the electric field can be determined as
E = k . Q / R²
where E is electric field, k is coulomb's constant (9 x 10⁹ Nm²/C²), Q is charge and R is radius.
From the question above, we know that
Q = 1.9 nC = 1.9 x 10¯⁹ C
R = 2 cm = 0.02 m
By substituting the parameters, we get
E = k . Q / R²
E = 9 x 10⁹ . 1.9 x 10¯⁹ / 0.02²
E = 42750 N/C
Hence, the electric field is 42750 N/C
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if you are driving 120 km/h along a straight road and you look to the side for 2.2 s , how far do you travel during this inattentive period?
During this inattentive period, the distance traveled is 73.33 when the speed is 120 km/h and the time taken is 2.2 s.
What connection exists between time, distance, and speed?Every moving object travels a particular distance over time. These two factors enable us to determine the speed. The frequency of displacement is the sole determinant of speed. The complete mobility of an object, regardless of direction, will be its distance. No matter where an object originates or finishes, distance measures how much ground it has travelled. A process, an action, or a condition's duration is the amount of time that can be measured or quantified. Speed is the rate at which an object travels along a path over time, whereas velocity is the speed and direction of an item's motion. In another sense, velocity is a vector, whereas speed is a scalar value. There is a formula that connects these three things. Speed can be thought of as a gauge for a body's rate of motion. The distance covered in a single unit of time is how it is defined.
Speed = Distance/ Time
We are given Average speed, = 120 km/h=(120 * 1000)/3600=33.33 m/s
Time, t=2.2s
Now speed = Distance/ Time
⇒ Distance = speed * time=33.33*2.2=73.33
Thus distance traveled is 73.33 m
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For a moon orbiting its planet, rp is the shortest distance between the moon and its planet and ra is the longest distance between the moon and its planet. what is a moon's orbital eccentricity if rp is equal to 0.27ra?
e = 0.57 is the moon's orbital eccentricity
You may determine the ellipse's eccentric formula by using
e = r a - r p / r a + r p
The distance r a between the moon and its planet is the greatest.
r p=0.27 The shortest distance between the moon and its planet is r a.
Then, e = r a - r p / r a + r p
e is defined as (r a - 0.27 r a) / (r a + 0.27 r a).
e = 0.73r a / 1.27 r a
e = 0.57
The eccentricity of a conic section expresses how much it resembles a circle. Every conic section has this distinctive parameter, and conic sections are only said to be identical if and only if their eccentricities are the same. A conic section's eccentricity is a non-negative real integer that specifically describes its shape. Formally speaking, two conic sections are comparable if and only if their eccentricities match. The eccentricity can be thought of as a measurement of how far a conic section strays from being round.
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Given that vector a b = c, and that lal lbl = lcl, how are vectors a and b oriented with respect to each other?
Vector a b = c, and that |al |b| = |cl, vectors a and b oriented with respect to each other because they are perpendicular to each other.
What is a vector?A vector is an object that has both magnitude and a direction. Geometrically, we can picture vector as a directed line segment, whose length is the magnitude of the vector and with an arrow indicating the direction. The direction of vector is from its tail to its head.
Two vectors are the same if they have same magnitude and direction. This means that if we take a vector and translate it to a new position (without rotating it), then vector we obtain at the end of this process is the same vector we had in beginning.
Two examples of vectors are those that represent the force and velocity. Both the force and velocity are in a particular direction. The magnitude of vector would indicate the strength of the force or the speed associated with the velocity.
We denote vectors using the boldface as in a or b. Especially when writing by hand where one cannot easily write in boldface, people will sometimes denote vectors using the arrows , or they use the other markings. We won't need to use the arrows here. We denote magnitude of the vector a by |a|. When we want to refer to a number and stress that it is not a vector, we can call number a scalar. We will denote scalars with the italics, as in a or b.
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