The name dinitrogen tetroxide tells you that this compound contains
*
a. two nitrogen atoms and two oxygen atoms.
b. four nitrogen atoms and two oxygen atoms.
c. two nitrogen atoms and four oxygen atoms.
d. four nitrogen atoms and four oxygen atoms.
Answer:
C. two nitrogen atoms and four oxygen atoms
Explanation:
The name dinitrogen tetroxide tells you that this compound contains two nitrogen atoms and two oxygen atoms. The correct answer is a) .
The name "dinitrogen tetroxide" provides information about the composition of the compound. "Dinitrogen" indicates that there are two nitrogen atoms (di- meaning two), and "tetroxide" indicates that there are two oxygen atoms (tetra meaning four in this context).
Therefore, the compound contains two nitrogen atoms and two oxygen atoms. The correct answer is a).
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El neumático de un automóvil se infla a una presión manométrica de 207 KPa la cual equivale a(30 lb/in²) en un momento en que la presión de los alrededores es de 1 atmosfera (1 atm = 101,3 KPa) y la temperatura es de 25 °C. Después de manejarlo, la temperatura del aire del neumático aumenta a 40 °C. Supongamos que el volumen del gas cambia sólo ligeramente. ¿Cuál es la nueva presión manométrica en el neumático?
Answer:
La nueva presión manométrica en el neumático es 117,48 kilopascales.
Explanation:
Supongamos que el gas contenido en el neumático del automóvil se comporta como un gas ideal, cuya ecuación de estado es:
[tex]P\cdot V=n\cdot R_{u}\cdot T[/tex] (Eq. 1)
Donde:
[tex]P[/tex] - Presión absoluta del aire, medido en kilopascales.
[tex]V[/tex] - Volumen del aire, medido en metros cúbicos.
[tex]n[/tex] - Cantidad molar del aire, medida en moles.
[tex]T[/tex] - Temperatura del aire, medida en Kelvin.
[tex]R_{u}[/tex] - Constante universal de los gases ideales, medida en kilopascal-metros cúbicos por mol-Kelvin.
Si sabemos que el neumático experimenta un proceso isocórico e isomolar de calentamiento y presurización, entonces podemos reducir la ecuación de estado a la siguiente relación:
[tex]\frac{P_{A}}{T_{A}} = \frac{P_{B}}{T_{B}}[/tex] (Eq. 2)
Donde:
[tex]P_{A}[/tex], [tex]P_{B}[/tex] - Presiones absolutas inicial y final del aire, medidas en kilopascales.
[tex]T_{A}[/tex], [tex]T_{B}[/tex] - Temperaturas inicial y final del aire, medidas en Kelvin.
Despejamos la presión absoluta final del aire:
[tex]P_{B} = \frac{T_{B}}{T_{A}}\cdot P_{A}[/tex]
La presión absoluta es la suma de la presión atmosférica y la presión manométrica, todas medidas en kilopascales. La presión absoluta inicial del aire es:
[tex]P_{A} =101,3\,kPa + 207\,kPa[/tex]
[tex]P_{A} = 208,3\,kPa[/tex]
Si [tex]T_{A} = 298,15\,K[/tex], [tex]T_{B} =313,15\,K[/tex] y [tex]P_{A} = 208,3\,kPa[/tex], la presión absoluta final del aire es:
[tex]P_{B} = \left(\frac{313,15\,K}{298,15\,K} \right)\cdot (208,3\,kPa)[/tex]
[tex]P_{B} = 218,780\,kPa[/tex]
Ahora, la presión manométrica final en el neumático es:
[tex]P_{man, B} = 218,780\,kPa-101,3\,kPa[/tex]
[tex]P_{man, B} = 117,48\,kPa[/tex]
La nueva presión manométrica en el neumático es 117,48 kilopascales.
How are common traits used to define a species?
Answer:
A species is often defined as a group of individuals that actually or potentially interbreed in nature. ... The definition of a species as a group of interbreeding individuals cannot be easily applied to organisms that reproduce only or mainly asexually. Also, many plants, and some animals, form hybrids in nature.
Explanation:
Answer:
A species is often defined as a group of individuals that actually or potentially interbreed in nature. ... The definition of a species as a group of interbreeding individuals cannot be easily applied to organisms that reproduce only or mainly asexually. Also, many plants, and some animals, form hybrids in nature.
Explanation:
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A train on a straight track goes in the positive direction for 5.9km and then back up for3.8km. What is the train's displacement, what is the total distance covered by the train?
Answer:
Trains displacement = 2.1 KM
Total distance covered by the train = 9.7 KM
Explanation:
Total distance covered by train will be the total distance moved train
hence
total distance covered by the train = distance covered by train in positive direction + distance covered by train in moving back
total distance covered by the train = 5.9 KM + 3.8 KM = 9.7 KM
_____________________________________
Displacement is the shortest distance from original position to the final position during the course of movement of any object.
Given that
Train moved 5.9 KM in positive direction(let it be AB as shown)
hence displace until now is 5.9 KM
but it again moved back for 3.8 KM(let it be B to C as shown below)
it means , train moved 3.8 KM towards origin position
so net displacement will be = 5.9 KM - 3.8 KM = 2.1 KM
A............................................................B ----> 5.9 KM
A_________C___________________B
3.8 KM
Thus, AC will be displacement = AB - BC = 5.9 KM - 3.8 KM = 2.1 KM
Thus,
Trains displacement = 2.1 KM
Total distance covered by the train = 9.7 KM
How many seconds would an Olympic skier take to race down a 2500 meter course going 250 m/sec?
Answer:
10 seconds
Explanation:
Hope this is right and that it helps.
You see if the skier is going 250 meters a second 250 times 10 is 2500 so it would take the skier 10 seconds.
Answer:
10 sec.Explanation:
distance = 2500 meters
velocity = 250 meter/second
time = distance / velocity
= 2500 meters
250 meter/second
= 10 sec.
How do a proton and neutron compare?
a. They are both found in the nucleus
b. the proton has the greater mass
c. They have opposite charges
d. The proton is farther from the nucleus
Answer:
A.
Explanation:
The answer should be A. because both the protons and neutrons are found in the nucleus. Also the other choices don’t make sense or don’t apply.
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Anygays-
which two forms of energy travel in waves
Answer: Electromagnetism and sound
Which describes the life of Rene Descartes
The male african elephant at the city zoo has a mass of 5450kg.what is its mass in scientific notation?
Answer:
5.45 x 10^3
Explanation:
Answer:
the top guy was right
Explanation:
Its right
What is the magnitude of the net torque on the wheel due to these three forces for an axis perpendicular to the wheel and passing through its center?.
The magnitude of the net torque on the wheel due to these three forces for an axis perpendicular to the wheel and passing through its center is
¹/₂MR³a.
Net torque on the wheel
The net torque on the wheel is determined from the moment of inertia of the pulley and the angular acceleration of the pulley.
∑τ = Iα
where;
I is moment of inertia of pulleyα is angular acceleration of the pulleyLet the pulley be a solid uniform disk, the moment of inertia of the axis perpendicular to the wheel and passing through its center is calculated as;
I = ¹/₂MR²
τ = ¹/₂MR²α
τ = ¹/₂MR²(aR)
τ = ¹/₂MR³a
where;
a is the acceleration of the pulley due to the applied force.Thus, the magnitude of the net torque on the wheel due to these three forces for an axis perpendicular to the wheel and passing through its center is ¹/₂MR³a.
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A car speeds up from rest to 40 m/s in 5 s. Find the car speed at 2 s and overall
distance traveled.
Answer:
I would have to say that i feel that after 2 seconds it would be 8 m/s and the overall distance would be 200 m but don't quote me on it
Explanation:
A penny is dropped into a well. It takes 5 seconds to fall. Calculate the depth of the well in feet
Why is there a main sequence? (Select all that apply.) There is a relationship between the luminosity and temperature of hydrogen-burning stars. Hydrogen-burning stars reach an equilibrium between the inward gravitational pull on their atoms and the outward pressure of their hot gases, which are heated by energy produced in nuclear reactions. Hydrogen-burning stars of the same mass come in a wide range of luminosities (with a variation in L/Lalchemist sun symbol on the order of about 104). There is a relationship between the luminosity and mass of hydrogen-burning stars. none of these
Based on astronomical records, the reasons why there is main sequence are:
There is a relationship between the luminosity and temperature of hydrogen-burning stars. Hydrogen-burning stars reach an equilibrium between the inward gravitational pull on their atoms and the outward pressure of their hot gases, which are heated by energy produced in nuclear reactions.There is a relationship between the luminosity and mass of hydrogen-burning stars. What is a star?A star can be defined as a giant astronomical or celestial object that comprises a luminous sphere of plasma and it is bounded together by its own gravitational force.
Generally, a star is typically made up of two (2) main hot gases and these include the following:
Hydrogen (H)Helium (He)What is a main sequence?A main sequence refers to a type of star that fuses hydrogen in its core and it has a stable balance of outward pressure as a result of core nuclear fusion and gravitational forces that are pushing inward.
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Pls help me in this question below
Answer:
b
Explanation:
Sir Isaac Newton explain the ocean tides result from the gravitational attraction of the Sun and Moon on the oceans of the Earth
To span the distance between two switches, why is adding an intermediate switch not an attractive choice
Adding an intermediate switch is not an attractive choice to span the distance between two switches due to expense issues. It may have different ports.
What is a network switch?A switch refers to a hardware tool capable of connecting different computer devices in a network.
A network switch can connect devices on a network by centralizing communications among many devices in a given local area network.
A switch may support different speeds for transmission of data (for example, one gigabit Gbps per second).
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is it possible to change a capacitor to any potential
Answer:
You can charge capacitor to any potential as long as charging voltage is less than rated voltage value of the capacitor. The voltage across a capacitor is limited by the dielectric strength of the insulating material times its thickness.
Please help meeeeeeeeeeeeeeeee
Explanation:
transverse wave is a type of wave that moves at right angles with the direction of the wave while a compressional/longitudinal wave is a wave that move parallel with the direction of the wave travel
Does guardians of the galaxy have multiple endings.
Answer: no I watch both of them
Explanation:
An eyeglass lens is cut with one surface having a radius R1 and the other surface having a radius R2, with R1 < R2. Both positive radii are measured from the same side with R1 being the side closer to the eye. Is this convex-concave lens a converging lens or a diverging lens?
a. This is a converging lens.
b. This is a diverging lens.
c. This can be either a converging or diverging lens, as more information is needed for a final determination.
d. This is neither since a lens cannot be made this way.
Answer:
c
Explanation:
c. This can be either a converging or diverging lens, as more information is needed for a final determination.
Suppose that John lives on a square block that is 180 yards per side,
and in the evenings, he walks with his dog around the block for a little
exercise.
a. If John walks once around the block, what distance does he
travel?
b. If John walks once around the block, what is his final
displacement?
Answer:
a. 720 yards
b. 254.56 yards
Explanation:
Given that the square block is 180 yards per side.
a. The distance traveled by John = The perimeter of the square block
The perimeter of the square block = 4 x Length of one of its sides
So that,
The distance traveled by John = 4L
= 4 x 180
= 720 yards
Thus, John travels a distance of 720 yards.
b. John's final displacement = [tex]\sqrt{x^{2} +y^{2} }[/tex]
where x ad y are the length of any two sides of the square block.
John's final displacement = [tex]\sqrt{180^{2} + 180^{2} }[/tex]
= [tex]\sqrt{64800}[/tex]
= 254.5584
John's final displacement is 254.56 yards.
A student throws a ball and a piece of clay at a wall. The ball and the clay have identical masses m and are thrown with the same speed v. The ball bounces elastically off the wall and back to the student. The clay sticks to the wall. How does the impulse the wall imparts on the ball compare to the impulse the wall imparts on the clay?
(A) One fourth as much
(B) Half as much
(C) They are the same
(D) Twice as much
(E) Four times as much
Answer:
option c they are the same
Explanation:
The wall will receive equal momentum from both the balls because both balls have equal mass and velocity
Imagine that someone is sitting down to enjoy a cup of coffee or hot chocolate. Use your experiences to describe how heat flows from the drink to its surroundings. Be as detailed as possible.
Answer:
The heat flows into my body and I start with a warming feeling going down my throat as it starts there I get this warm feeling and I break out in a coldsweat from consuming a warm drink a cold drink will help cool me down
Explanation:
If drink something warm, you will be warm. If you drink something cool, you will cool down.
discuss the role of global ization in the development of SI unit
Answer:
Sharing of information
Explanation:
The development of SI unit has helped in the sharing of scientific as well as techical information internationally.
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Carbon has an atomic number of 6 . Based on this evidence , what can you claim about catbon.
A light-year (ly) is a unit of distance defined as thedistance light travels in
one year. Numerically, 1 ly =9 900 000 000 000 km. How many meters are
in alight-year?
Answer:
9 900 000 000 000 km = 9 900 000 000 000 000 m
Explanation:
9 900 000 000 000 * 1000
A 4.0 kg box is pressed into a spring. The spring constant is k=220 n/m. The box is released at the bottom of a frictionless ramp and rises to a height of y=0.75m
A 4.0 kg box is pressed into a spring. The spring constant is k = 220 N/m. The box is released at the bottom of a frictionless ramp and rises to a height of y = 0.75 m as shown below.
How far was the spring compressed?
Answer: 0.52 m
When watching the interstellar movie:
Copper and Dr.Brand we’re on Millers planet for approximately _____ years.
This means that the total time Dr. Mann weren’t without human contact is: ____ years.
Which of these examples best shows a change from potential to kinetic energy?
Answer:
Water flowing over a tall cliff
Explanation:
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If an object accelerates from rest, what will its velocity be after 2.1 s, if it has a constant acceleration of 9.8 m/s²?
If an object accelerates from rest, the velocity after 2.1 s, if it has a constant acceleration of 9.8 m/s² is 43.218 m/s².
To find the velocity, the given values are,
Time = 2.1 seconds
Acceleration = 9.8 m/s².
What is Acceleration?Acceleration can be defined as the rate of change of the velocity of an item with appreciation to time. Accelerations can be vector portions. The orientation of an item's acceleration is given by the orientation of the net pressure appearing on that object.
The acceleration will remain the same at 9.8 m/s². as under free fall conditions acceleration due to gravity remains constant.
Calculation:-
V = U + at
V = 0 + 9.8 × (2.1)²
= 9.8 × 4.41
= 43.218 m/s².
But, the acceleration will remain the same at 9.8 m/s neglecting air resistance.
Acceleration is the charge at which velocity modifications with time, in terms of each speed and route. A factor or an object moving in a straight line is accelerated if it quickens or slows down. movement on a circle is extended despite the fact that the rate is consistent because the course is continually changing.
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How much heat is required to warm 230 g of water from 12°C to 90°C?
(Specific Heat of Water = 4.184)