40.1L volume of h2 gas that is measured at 26 c and 100 kpa will be produced from Na of mass given as 3.25g.
What does pressure unit kPa mean?Kilopascal (kPa), a 1,000-fold increase in the meter-kilogram-second system’s measure of pressure and tension (the International System of Units [SI]).
Blaise Pascal, a French mathematician and scientist, is honored by its name.
How is kPa determined?The formula below can be used to translate kg/cm2 into kPa:
A kPa equals 1000 pascals (Pa)
1 kg/cm2 is equal to 98066.5 pascals (Pa), or kPa value multiplied by 1000 Pa.
Thereafter,
T = 26°C
= 299K
P = 100kPa
P= 100/101.325
=0.986923 atm
mass = 3.25g
Atomic mas of H = 1.00784
molar mass of H2 gas = 2x10.00784
= 2.01568g/mol
mole of H2 in 3.25g = 3.25/2.01568 = 1.612359 mol
This gas provided in the question follows the ideal gas equation, so it can be written as
PV = nRT
⇒ V = nRT/P
= (1.612359x 0.0821x 299) / 0.986929
⇒ V = 40.104473
V = 40.1 L
Thus, the volume of gas was found to be 40.1Liter.
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what is meant by temperature?
Answer:
Average kinetic energy per molecule in a substance
Explanation:
A heat engine operates in a carnot cycle between reservoirs of temperatures 1000 k and 400 k. it is found to discharge 20 j of heat per cycle to the cold reservoir. what is the work output per cycle?
A heat engine operates in a Carnot cycle between reservoirs of temperatures 1000 k and 400 k. it is found to discharge 20 j of heat per cycle to the cold reservoir, then the work done by the engine would be 60 joules.
What is a Carnot engine?It is a hypothetical engine that is presumable to have the highest efficiency of all engines in the universe.
The Carnot engine is the most efficient engine available.
If a heat engine runs in a Carnot cycle between reservoirs with temperatures of 1000 k and 400 k, as stated in the issue. It is discovered that it releases 20 j of heat to the cold reservoir per cycle.
The efficiency of the engine = 1 - 400/1000
=0.6
Heat supplied = heat rejected + work done
The efficiency of the engine = 0.6 = work done/Heat supplied
0.6 = work done/heat rejected + work done
0.6 =W / 20 + W
The work done = 60 joules
Thus, the work done by the engine would be 60 joules.
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Suppose you are on a cart, initially at rest, which rides on a frictionless horizontal track. If you throw a ball off the cart towards the left, will the cart be put into motion?.
If you throw a ball off the cart towards the left then the cart will move to the left .
How the cart moved to the left and what phenomena was into consideration?The cart is initially at rest, but then rides on a frictionless horizontal track.Throwing a ball towards the left will obviously put the cart into motion.The cart will start moving in left because the ball was thrown left.To balance the momentum of the ball in the opposite direction the cart started moving towards the left.The phenomena to understand this is the law of conservation of momentum.To know more about momentum and conservation visit:
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What are the magnitude and direction of electric field midway between these two charges?
No matter how far away or how large the charges are, the electric field in the middle of any two equal charges is always zero.
E is equal to Fe/q [where q is a positive test charge, Fe is the electric force vector, and E is the electric field vector].
According to the Coulomb Force, Fe = k Q q / r2,
and as a result, E = [K Q q / r2]/q
=K Q/r^2
Because similar charges repel one another, the field's orientation is away from the core charge.
The outcome is TWO FIELDS with the same magnitude but opposing directions, giving a value of ZERO.
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How do sub particles behave with each other
Answer:
The strong force binds quarks together within protons, neutrons, and other subatomic particles. Rather as the electromagnetic force is ultimately responsible for holding bulk matter together, so the strong force also keeps protons and neutrons together within atomic nuclei.
Explanation:
Hope this helps! :) If you need something more lmk
If the airspeed of the plane (its speed in still air) is 335.0 km/h, in which direction should the pilot head?
The plane's speed relative to the ground is 309.8 km/h.
Airspeed of the plane = 335 km/h
Speed of the wind toward the south = 80 km/h
The pilot should head in the direction,
OA= AB × cos θ
[tex]cos \: θ = \frac{OA}{AB}[/tex]
[tex] θ = cos ^{ - 1} (\frac{OA}{AB})[/tex]
[tex]cos \: θ = \frac{80}{335}[/tex]
θ = 75.5°
When the airspeed is 335 km/h the pilot must head 75.5° West or North.
The plane speed relative to the ground is,
OB = AB × sin θ
OB = 335 × sin (75.5°)
OB= 309.8 km/h
Therefore, the plane's speed relative to the ground is 309.8 km/h.
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9
> G.1 Calculate velocity from time and distance RXW
Submit
ations
plans
Matthew was parasailing at a constant velocity behind a motorboat. As he was parasailing, he
passed over a kayak moving at 64 meters per minute, and he moved 200 meters west in
0.5 minutes. What was Matthew's velocity?
Write your answer as a whole number.
meters per minute to the west
As he was parasailing, he passed over a kayak moving at 64 m/minute, and he moved 200 meters west in 0.5 minutes. Matthew's velocity will be 400m/minute to the west.
The velocity of an object can be defined as the rate of change of an object's position relative to the frame of reference and over time. It sounds complicated, but basically, the speed is accelerating in a particular direction. It is a vector quantity, which means we need both magnitude (speed) and direction to determine speed. Its SI unit is meters per second (ms-1). If there is a change in magnitude or direction in the speed of an object, the object is said to be accelerating.
According to the question:
Velocity = Distance/ Time
Given in the question:
Distance= 200
Time= 0.5 minutes
Substitute the value,
Velocity= 200/0.5
Velocity = 400m/minute
Therefore, the velocity for the given question is 400m/minute.
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The escape speed from the moon is much smaller than from earth, around 2. 38 km/s. True or false?.
The statement is True.
What is the Escape speed of the Moon?
The Escape velocity of the Moon is 2.38km/s.
The conservation of energy and an energy field with a finite depth leads to the existence of escape velocity. When moving under conservative forces (like a static gravity field), an object with a given total energy can only travel to combinations of locations and speeds that have that total energy; locations with higher potential energy cannot be reached at all. The object's reachable locations increase as speed (kinetic energy) is added; with enough energy, the locations become infinite.The minimum speed an object needs to travel at in order to "escape" gravity for a given gravitational potential energy at a given position is known as the escape velocity (i.e. so that gravity will never manage to pull it back). Because it does not specify a direction of travel, escape velocity is actually a speed (not a velocity) and the object can escape the gravitational field in any direction (provided its path does not intersect the planet).
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what was Ethan's velocity between 9:30 and 10:00, in km/hr?
Ethan's velocity between 9:30 and 10:00 in km/hr is 10.
Equation :To know the velocity of the in between 9.30 and 10,
Use the formula,
speed = distance / time
Given,
distance 1 = 10 km
distance 2 = 15 km
time = 30 min
v = ?
Putting values,
v = Δs/Δt
v = 15 - 10 / 30 min
v = 5 / 1800 sec
v = 5000 m / 1800 sec
v = 2.78 m/sec
Or,
v = 5 km / 0.5 h
v = 10.0 km/h
Velocity :The direction of a body or object's movement is defined by its velocity. In its basic form, speed is a scalar quantity. In essence, velocity is a vector quantity. It is the speed at which distance changes. It is the displacement change rate.
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An example of mechanical work is ________; an example of transport work is _______.
An example of mechanical work is the contraction of muscles; an example of transport work is the pumping of ions across the cellular membranes.
Generally, our cells can perform three major types of work which include chemical work, mechanical work as well as transport work.
A chemical work example is the building of proteins which are considered large molecules. The energy required for the dehydration synthesis reaction is provided by ATP which is able to link amino acids together.
One of the major examples of mechanical work is the activity of contraction of muscles. In the muscle cells, phosphate groups are transferred to certain proteins by ATP. These proteins are able to change the shape, which can start a series of events that makes the contraction of muscle cells.
On the other hand, a transport work example includes the activity of pumping solutes including ions to pass across a cellular membrane. Here again, there will be a transfer of a particular phosphate group from ATP that makes the respective receiving membrane protein so as to change shape as well as enable ions to pass through effectively.
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By adding weights around the ankles, what happens to the moment of inertia of the lower limb as it swings about the hip during walking?
The rationale underlying this hypothesis is that carrying the loads on the arms is dominated by passive dynamics.
The moment of inertia of the lower limb by passive dynamics.
Explanation:
This hypothesis is supported by the reasoning that, if passive dynamics predominates when loads are carried on the arms, then passively swinging a load should be less expensive than actively swinging a load when it is carried on the legs (Browning et al., 2007; Royer and Martin, 2005).
Because carrying loads close to the body's COM has typically been observed to be the least expensive way to carry loads while walking (Browning at all., 2007; Royer and Martin, 2005; Soule and Goldman, 1969)
We also hypothesized that carrying loads on the swinging arms would be more expensive than carrying loads near the COM (positioned about the waist in this study).
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Niobium (nb) has a bcc crystal structure, an atomic radius of 0.143 nm, and an atomic weight of 92.91 g/mol. compute and compare its theoretical density with the experimental value.
Both the theoretical density and experimental value is 8.57g/cm3
The term crystal structure, in crystallography, denotes that the structure in which the atoms (ions or molecules) are attached are arranged in an ordered manner. The smallest repeating unit of the crystal structure is called a unit cell.
Given that:
The radius of Nb is given as R=0.1430nm
The density of Nb is given as d=8.57g/cm3
The atomic weight of Nb is given as M=92.91g/mol
Also, given that the structure is BCC.
The value of the number of atoms per unit cell in BCC is Z=2
The formula for the edge length of BCC structure is,
a=4R/(√3)
Substitute the given values
a=(4*0.1430 nm)/(√3)
=3.3024×10−8cm
The formula for the density of the Nb in BCC structure is,
d2=(Z×M)/(a3×NA)
Substitute the given values.
d1=(2×92.91g/mol)/((3.3024×10-8cm)3 × 6.022 × 1023 mol-1)
=(185.82g/mol)/(21.68cm3/mola3×NA)
=8.57g/cm3
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The first telescopic photo shows what appears to be a single star. The second photo shows the same object, now revealed to be two distinct stars. What is the difference between the two photos?.
Explanation:
i think the second picture is smaller and has a better angular resolution
In second photo, there has more resolution than that of first photo.
What is resolving power?The ability of an optical equipment to discern between two things that are close to one another and produce distinct images of the two items is known as its resolving power.
To put it simply, when viewed through an optical instrument, resolving power varies inversely with the distance between the two objects to be resolved. As a result, when viewed from the device, the images of two things that are close to one another should appear distinct and separate.
Consider using a telescope to observe two stars that are close to one another; the telescope's resolving power depends on its capacity to distinguish between the pictures of the two stars.
According to the question, second telescope can detect two stars separately but first one can't because the resolving power of the second telescope is greater than that of first one. That's way, the difference between the two photos is that second photo is with greater resolution.
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Oil drips from a car at a rate of 1 drip every 0.1 second. Which of the patterns below would best represent the pattern of drips from the car if it were accelerating constantly?
The equally spaced dots shows a car if it were accelerating constantly.
What is acceleration?The term acceleration has to do with the rate of change of the velocity of a body with time. We know that velocity is a vector quantity. This implies that both the magnitude and the direction of the velocity are all important. The same goes for acceleration. The acceleration is a vector quantity so both its magnitude and direction are deemed as important.
Now we know that if the acceleration is uniform or constant, the velocity would increase by equal amounts in equal time intervals. We now have to check out to see the cases in which the image suggests that the velocity changes by equal amounts in equal time intervals.
Looking at the image as attached, the dots are equally spaced. The equal spacing of the dots shows us the way and manner in which the velocity of the car increases. Thus the image attached shows us that the velocity does increase by equal amounts in equal time intervals.
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Consider an incandescent lightbulb. If you wanted to turn a 10-w lightbulb into a 100-w lightbulb, how would you change the temperature of the filament inside the bulb?.
By using the blackbody radiation formula, the temperature of the filament inside the bulb is changed by a factor of 10⁰'²⁵.
We need to know about black body radiation to solve this problem. The energy radiated by a black body object is proportional to the area and the fourth power of temperature. It can be determined as
P = A . e . σ . T⁴
where P is power, A is surface area, e is emissivity, σ is Stefan Boltzmann's constant ( 5.67 x 10¯⁸ W/m²K⁴) and T is temperature.
From the question above, we know that
P1 = 10 watt
P2 = 100 watt
T1 = T1
By using the black body radiation formula, the ratio of temperature is
T1⁴ / T2⁴ = P1 / P2
Hence,
T1⁴ / T2⁴ = P1 / P2
T1⁴ / T2⁴ = 10 / 100
T1⁴ / T2⁴ = 1 / 10
T2⁴ = 10T1⁴
T2 = ⁴√(10T1⁴)
T2 = T1 x 10⁰'²⁵
Thus, the temperature of the filament inside the bulb is changed by a factor of 10⁰'²⁵.
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A fertilised egg (zygote) has a diameter of 0.01 cm. At birth the average baby measures 50 cm in length. Calculate the change in order of magnitude of length from fertilisation to birth.
does anyone know the answer??
Differences in size are often described as differences in the order of magnitude. That's the difference calculated in factors of 10.
At the time of fertilization-
0.01cm = 1/100 = [tex]10^{-2}[/tex]
At the time of birth-
50cm = 5 × [tex]10^{1}[/tex]
Meaning there is 3 order of magnitude between the egg(zygote) (0.01cm) and child after the birth ( 50cm ).
Notice that when dividing numbers in standard form, we subtract the powers.
When comparing orders of magnitude, actual distances can be approximated. It’s the relative difference that is important.
Hence, the change in the order of magnitude of length from fertilization to birth of a child is 3 ( three )
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If a car travels 270 meters in 30 seconds, then what is its
average speed?
Answer:
9m/s
Explanation:
Speed = Distance ÷ Time
Distance=270meters
Time =30 seconds
270m
30s
=9m/s
Blood is accelerated from rest to a speed of 27.5 cm/s in a distance of 1.75 cm by the left ventricle of the heart. determine the magnitude of the acceleration of the blood.
The blood that travel from rest to a speed of 27.5 cm/s in a distance of 1.75 cm has an acceleration of: 216.07 cm/s²
The formulas and procedures we will use to solve this exercise are:
a = (vf² - vi²)/2 * x
Where:
a = accelerationvi = initial velocityvf = final velocityx = distanceInformation about the problem:
vi= 0 cm/sx= 1.75 cmvf= 27.5 cm/sa=?Applying the acceleration formula we have:
a = (vf² - vi²)/2 * x
a = [(27.5 cm/s)² - (0 cm/s²)] /2 * 1.75 cm
a = [756.25 cm²/s² - 0 cm²/s²] /3.5 cm
a = [756.25 cm²/s² ] /3.5 cm
a = 216.07 cm/s²
What is acceleration?It is a physical quantity that indicates the variation of velocity as a function of time, it is expressed in units of distance per time squared e.g.: m/sec2 ; km/h2
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A gas cylinder of cf2=cf2 is unexpectedly found to have lost all pressure. upon being sawn open, what was discovered? (a true story)
The correct answer is Teflon
Numerous applications can be found for polytetrafluoroethylene (PTFE), a synthetic fluoropolymer of tetrafluoroethylene. It is one of the most popular and often used PFAS. Teflon, manufactured by Chemours, a division of DuPont, which made the compound's initial discovery in 1938, is the term by which PTFE-based materials are most generally recognized. Polytetrafluoroethylene, a high-molecular-weight polymer made entirely of fluorine and carbon, is a fluorocarbon solid. PTFE is hydrophobic, meaning that neither water nor things containing water can bind to it. This is because fluorocarbons only exhibit weak London dispersion forces since fluorine has a poor electric polarizability. One of the lowest coefficients of friction of any substance is found in PTFE. For pans and other cookware, polytetrafluoroethylene is utilized as a non-stick coating.
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A room is heated by an iron that is left plugged in. is this work interaction? take the entire room, including the iron, as the system.
It is a work interaction because the electrons are crossing the system boundary, thus doing electrical work.
Work will be defined as intricate patterns of interpersonal communication amongst interdependent people. All interaction places restrictions on individuals involved while also allowing them to do things they otherwise would not be able to.
Verbal, bodily, phone, and written communication are the four basic methods used in the workplace. You always have to deal with at least one at any given time during the working day.
Beneficial relationships at work have been demonstrated to increase job satisfaction and have a positive impact on staff turnover since employees who feel supported by their coworkers are more likely to stay with a company over the long run (Hodson, 2004; Moynihan & Pandey, 2008).
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If its volume remains unchanged, what will its pressure be at the temperature at which co2co2 solidifies?
The pressure for CO₂ will be 0.75atm when volume remains unchanged.
What is pressure?The force delivered perpendicularly to an object's surface per unit area across which that force is dispersed is known as pressure. In comparison to the surrounding pressure, gauge pressure is the pressure. Pressure is expressed using a variety of units.
PV = nRT
[tex]\frac{P_{1} }{T_{1} } = \frac{P_{2} }{T_{2} }[/tex]
[tex]P_{1} = \frac{1.05atm}{273K} * (194.5K)[/tex]
P1 = 0.748atm
which on round figure gives us,
P1 = 0.75 atm
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Which would have the larger heat capacity, a large iron skillet or a small iron skillet?
A large iron skillet may hold more heat capacity than a small one because of its larger mass. Both skillet have the same specific heat because they are constructed of the same material.
A physical feature of matter known as heat capacity or thermal capacity is the quantity of heat that must be applied to an object in order to cause a unit change in temperature. J/K is the metric unit for heat capacity.
An extensive property is heat capacity.The heat is related to the substance's mass and the temperature change since the transferred heat is equivalent to the change in internal energy.
An object's mass and chemical makeup both affect its ability to hold heat. Therefore, a large iron skillet may hold more heat capacity than a small one because of its larger mass. Both skillet have the same specific heat because they are constructed of the same material.
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The length between two given vectors is called what?
explain please
A hydrogen atom in the n=6 state decays to the n=3 state. what is the wavelength of the photon that the hydrogen atom emits? use hc=1240 nm ev.
The wavelength of a photon that the hydrogen atom emits is 1.093 x 10^-8 m.
The wavelength of a photon is given by the following formula,
1/λ = R{1/n1^2- 1/n2^2}
Here λ is the wavelength of the photon
R is the Rydberg Constant= 1.097 x 10^7 m
N1 is the initial state
N2 is the final state
Putting n1 =3, n2= 6 in the above equation, the wavelength lambda comes out to be,
1/λ = R{1/(3)^2 - 1/(6)^2}
λ = 12/1.097 x 10^7
Lambda = 1.093 x 10^-8 m.
Hence, the wavelength of the photon that the hydrogen atom emits is 1.093 x 10^-8 m.
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What is the main reason for searing a roast at a high temperature before finishing it at a lower temperature?
Prior to cooking, searing meats at high heat seals the pores, preserving the juices and preventing shrinking.
Why is a roast seared at a high temperature before being finished at a lower temperature?A roast looks and tastes good when it is roasted at high temperatures (400°F and above). For thin, tender meats that depend on a flavorful, well-browned crust for flavor, such beef tenderloin and pork tenderloin, this approach works best.
Why is a roast seared in the first place?If you want to produce the most delectable roasts, steaks, chops, and other meat dishes, searing the meat is a necessary step.
Meat is seared to caramelize the natural sugars and brown the proteins, resulting in a thick, nutty crust.
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A gold atom has a radius of 145 pm. if you could string gold atoms like beads on a thread, how many atoms would you need to have a necklace 36.0 cm long?
[tex]1.17\times 10^{9 }[/tex]atoms would you need to have a necklace 36.0 cm long.
The radius of the gold atom = 145pm
The diameter of gold atom = 2[tex]\times[/tex]145pm
= 290Pm
[tex]=290\times10^{-10} cm[/tex]
gold atoms = [tex]34cm/290\times10^{-10}cm[/tex]
= [tex]1.17\times 10^{9}[/tex] atoms will be find in 36.0 cm necklace
Atomic radius is the distance from the nucleus to the edge of the atom
atomic radius decreases as we go across the periodic table
electronegativity is ability of an atom to attract electrons when the atom is in a chemically combined compound
Atomic Radius : Group Trend: as we go down a column, atomic radius increases.
Periodic Trend: as we go across a period, (L to R), atomic radius decreases.
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The ability to buy a soda from a vending machine demonstrates which element of the marketing mix?
It demonstrates the place/distribution element.
Place, or its more popular name “distribution,” refers to the method by which a company delivers its goods to clients. It is one thing to have a fantastic product that is priced reasonably.
Which four forms of distribution are there?Direct selling, selling through intermediaries, dual distribution, and reverse logistics channels are the four different categories of distribution channels.
What does distribution or place mean in marketing?Distribution (or place) is one of the marketing mix’s four components. Making a good or service accessible to any consumer or any business user who is in requirement of it is the process of distribution.
The producer or service provider may carry this out directly or through indirect channels, such as distributors or intermediaries.
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Which cells have plasma membranes that undergo voltage changes in response to stimuli?
Neuron and muscle cells have plasma membranes that undergo voltage changes in response to stimuli.
What is a neuron?Neurons are messengers of information.
Between various brain regions and between the brain and the rest of the nervous system, information is transmitted using electrical impulses and chemical signals.
A neuron has a cell body that includes a nucleus and cytoplasm, from which long, thin hair-like structures emerge.
The axon, a solitary long component of the neuron, is responsible for carrying the nerve impulse to various body areas.
The dendrites are the neuron's small, branching body sections.
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How many neutrons per second are emitted spontaneously from a 1 mg sample of 252cf?
2. how many neutrons per second are emitted spontaneously from a 1 mg sample of 248cm?
The number of neutrons per second are emitted spontaneously is [tex]2.3\times10^9[/tex] neutrons/mg-s.
An atom is made up of three distinct subatomic components. Protons, electrons, and neutrons are what they are. In an atom, protons and electrons are positively charged, while neutrons are uncharged or neutral entities. The masses and charges of each of these subatomic particles are known.
The number of atoms in 1 gm of Cf - IS
[tex]N= (1g)(10^{-3})(6.02\times 10^{23} atoms/mol)/252 g/mol[/tex]
[tex]=2.38\times 10^{21} atoms/gm[/tex]
The number of neutrons released per each fission is 3.73 and the fission probability per decay is,[tex]3.09\times 10^{-2}[/tex]
[tex]=(3.73)(2.38\times 10^{21})(8.318\times10^{-9})(3.09\times10^{-2})[/tex]
[tex]=2.28\times 10^{12 }[/tex]neutrons/g-s
Therefore the number of neutrons per second are emitted spontaneously is,
[tex]=2.28\times 10^{12 }[/tex]neutrons/g-s
[tex]=2.28\times 10^{12 }[/tex] neutrons/g-s([tex]10^{-3}[/tex]/1mg)
=[tex]2.13\times10^{9}[/tex] neutrons/mg-s
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A uniform solid sphere rolls down an incline. what must be the incline angle if the linear acceleration of the center of the sphere is to have a magnitude of 0.10 g?
The uniform solid sphere rolls down an incident angel for solid sphere is θ = 9.6 degree .
What is incident angel?The angle of incidence in geometric optics is the angle formed between a ray incident on a surface and the normal, or line perpendicular to the surface at the point of incidence. Any wave, including optical, acoustic, microwave, X-ray, and others, can create a ray.
required acceleration = .12 g
The term for the acceleration of a rolling body on an inclined surface
= gsinθ / 1 + k² / R²
Here rolling body is sphere
k² = 2/5 R²
k² / R² = 2/5
acceleration = g sinθ / 1 + k² / R²
.10 g = g sinθ / 1 + k² / R²
.10 g =g sinθ / 1 + 2/5
.10 = sinθ / 1.4
sinθ = .168
θ = 9.6 degree .
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