Answer:
On Waves. Quantum mechanically, an electron can be described by a wave function oscillating in space and time that has mean values equal to the expectation values of observables corresponding to given operators. ... Electrons are fermions. They are charged particles. in short the quantum theory
i hope its helpful !
Frictional force increases with the increase in the _______________ of the surface.
1 point
Smoothness
Roughness
Softness
None of the above
Answer:
Frictional force increases with the increase in the roughness of the surface.
Explanation:
You will see that the rougher the surface, the greater the wear and tear.
please help i really need it right now
Try the suggested option, all the details are in the attachment.
Explanation:
1) to calculate the moles of CCl₄;
2) to calculate the moles of HF;
3) to calculate the mass of CCl₂F₂;
4) to calculate the mass of ureacted HF.
Convert 0k temperature into Celsius fahrenhet
and Reumer scale.
Answer:
-273.15 celcius
−218.52 Réaumur
Explanation:
273. 15 kelvin = 0 degrees celcius
C + 273.15 =k
08. Degrees celcius = 1 Réaumur
C x 0.8 = rea
A wave traveling at 280 m/s has a wavelength of 5. 2 meters. The frequency of this wave is CHOOSE ANSWER
Answer:
The frequency of the wave will be 53.85 Hz
Explanation:
to determine our answer, we can use the following formula "Speed = Wavelength x Frequency."
Speed = 280 m/s
wavelength = 5.2 meters
frequency = ?
meaning, 280 m/s=5.2 times x
divide each side by 5.2
x=700/13 or 53 11/13, or x=53.85
What do astronomers observe to find clues as to how our solar systems are formed?
Answer:
a. Patterns of motion among large bodies- Sun, planets, large moons rotate in an organized way (co-planar)—nearly circular orbits in the same direction (coplanar and prograde)
b. Two major types of planets- terrestrial vs. jovian planets
c. Asteroids and comets- locations, orbits, and compositions follow distinct patterns—Asteroids are b/t Mars and Jupiter in the asteroid belt. Also located in the Kuiper belt and Oort Cloud
d. Exceptions to the rules- Earth is inner planet with large moon, Uranus is only side tilted axis, etc.
Hope this helps
what is Law of gravitation?
universal gravitation is usually started as the particle extracts every other particle in the universe with the force which is directly proportional to the product of masses and inversely proportional to the square of the distance between their centres.
please mark my ans as BRAIN LISTI just wanna know if I’m correct and how?
Answer:
i think that you are right becuase when the line goes down it goes back up and passes 10 and goes down and passes 20 and 20 is 2 10's and 10-10 is 0
Explanation:
i think your right
What are the Planets in order and how far away are they from the Sun?
A clay cube has sides that are 5 cm long and a mass of 20 g. What is the density of the clay?
(Help)
Answer:
density = 0.16[gr/cm^3] = 160 [kg/m^3]
Explanation:
To solve this problem we must use the definition of density which tells us that this is equal to the relationship between mass and volume. In this way we have:
Since the body is a cube, its sides are equal we have:
v = 5 * 5 * 5 = 125 [cm^3]
m = 20 [grams]
density = m / v
density = 20/125
density = 0.16 [grams/cm^3]
Now if we convert the units to the international system, we have:
[tex]0.16[\frac{gr}{cm^{3} } ]*\frac{1kg}{1000gr} *\frac{100^{3} cm^{3} }{1^{3} m^{3} } \\= 160 [kg/m^{3} ][/tex]
9
How can you prove that air has weight
Answer:
Air does, in fact, have weight, and here's a simple way you can prove it. You'll need two identical balloons, a string, and a dowel. Attach the uninflated balloons to either end of the dowel. Attach the string to the center of the dowel and then hang it from something.
Explanation:
Spring compressed 10cm by 100N force and held in place with Pin. Pin is pulled and block is pushed Up the incline. Uk(coefficient of kinetic energy)=. 39
Determine the speed of block after the Spring extends forward 7cm,
Determine the height at which the block will stop moving
Determine the length of the incline such that the leading edge of the block is stopped when the block reaches the end of the incline.
The compression of 10 cm by a 100 N force on the plane that has a
coefficient of friction of 0.39 give the following values.
The velocity of the block after the Spring extends 7 cm is approximately 1.73 m/sThe height at which the block stops rising is approximately 1.1415 mThe length of the incline is approximately 1.536 mHow can the velocity and height of the block be calculated?Mass of the block, m = 3 kg
[tex]Spring \ constant, K = \dfrac{100 \, N}{0.1 \, m} = \mathbf{ 1000\, N/m}[/tex]
Coefficient of kinetic friction, [tex]\mu_k[/tex] = 0.39
Therefore, we have;
Friction force = [tex]\mathbf{\mu_k}[/tex]·m·g·cos(θ)
Which gives;
Friction force = 0.39 × 3 × 9.81 × cos(48°) ≈ 7.68
Work done by the motion of the block, W ≈ 7.68 × d
The work done = The kinetic energy of the block, which gives;
[tex]\mathbf{\dfrac{1}{2} \times k \cdot x^2 }= 7.68 \cdot d[/tex]
The initial kinetic energy in the spring is found as follows;
K.E. = 0.5 × 1000 N/m × (0.1 m)² = 5 J
The initial velocity of the block is therefore;
5 = 0.5·m·v²
v₁ = √(2 × 5 ÷ 3) ≈ 1.83
Work done by the motion of the block, W ≈ 7.68 N × 0.07 m ≈ 0.5376 J
Chane in kinetic energy, ΔK.E. = Work done
ΔK.E. = 0.5 × 3 × (v₁² - v₂²)
Which gives;
ΔK.E. = 0.5 × 3 × (1.83² - v₂²) = 0.5376
Which gives;
The velocity of the block after the Spring extends 7 cm, v₂ ≈ 1.73 m/sThe height at which the block will stop moving, h, is given as follows;
[tex]At \ the \ maximum \ height, \ h, \ we \ have ; \ \dfrac{1}{2} \times 1000 \times 0.1^2 = 7.68 \times x[/tex]
Which gives;
[tex]Length \ of \ the \ incline \ at \ maximum \ height, \ x_{max} =\dfrac{ 7.68 }{ \dfrac{1}{2} \times 1000 \times 0.1^2 } \approx 1.536[/tex]
The distance up the inclined, the block rises, at maximum height is therefore;
[tex]x_{max}[/tex] ≈ 1.536 m
Therefore;
h = 1.536 × sin(48°) ≈ 1.1415
The height at which the block stops rising, h ≈ 1.1415 mFrom the above solution for the height, the length of the incline is he
distance along the incline at maximum height which is therefore;
Length of the incline, [tex]x_{max}[/tex] = 1.536 mLearn more about conservation of energy here:
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how are electromagnets used in communication{plsssssssssssssssss pu!!! deadline na next week !!!!!}
Radio works by transmitting and receiving electromagnetic waves. The radio signal is an electronic current moving back and forth very quickly. A transmitter radiates this field outward via an antenna; a receiver then picks up the field and translates it to the sounds heard through the radio
Answer:
radio work by transmitting and receiving electro magnetic waves.
When someone throws a ball, the action force is the person pushing on the ball. What is the reaction force? the ball pushing on the person the ball pushing against air the ball being pulled toward the ground the ball being pulled away from the person
Answer:
A
Explanation:
the ball pushing on the person
a ball rolls down a ramp,starting from rest, after 4 seconds, it’s velocity is 12m/s. what is the acceleration of the ball?
Answer:
acceleration = (change of velocity) / (time)
a = 12/ 4 = 3 m/s2
The marble in the figure to the right has a mass of 3.75 g. When placed in a graduated cylinder, as pictured, the water level changes from 25 mL to 28 mL. What is the density of the marble?
Answer:
The answer is 1.25 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 3.75 g
volume = final volume of water - initial volume of water
volume = 28 - 25 = 3 mL
We have
[tex]density = \frac{3.75}{3} \\ [/tex]
We have the final answer as
1.25 g/mLHope this helps you
A student hypothesizes that the rate of a chemical reaction will increase as the concentration of the reactants increases. To test his hypothesis, the student performs an investigation. Which are the independent and the dependent variables in the investigation?
Answer:
independent variable- concentration of reactants
dependent variable- rate of reaction
Explanation:
A dependent variable is a variable that is placed under test and is measured under the process of a scientific experiment.
An independent variable is a variable that undergoes the change in the experiment performed. This change is done with respect to test the efforts that are observed on the dependent variable.
In the given hypothesis, 'concentration of reactants' is the independent variable and 'rate of reaction' is the dependent variable
convert 30 C into kelivn and fahrenheit scale
A car accelerates from 15 m/s to 60 m/s in 30 seconds. What is it’s acceleration?
When a car accelerates from 15 m/s to 60 m/s in 30 seconds, the acceleration of the car is 1 meter/second².
What is acceleration?Acceleration is the rate at which speed and direction of velocity vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates. Even if the speed is constant, motion on a circle accelerates because the direction is always shifting. Both effects contribute to the acceleration for all other motions.
Given parameters:
Initial speed: u = 15 m/s.
Final speed: v = 60 m/s.
Time interval: t = 30 seconds.
Then, according to definition of acceleration,
Acceleration of the car = change in speed/ time interval
= ( final speed - initial speed)/time interval
= ( 60 m/s - 30 m/s)/30 seconds
= 1 meter/second²
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A ball is thrown horizontally. What is the ball's acceleration at its highest point
why does somthing fall faster if it is heavier
why does something fall faster if it is heavier?
➪ First of all I would like to inform you that this statement is not true. The acceleration does not depend on the mass of the object. Heavier things have a greater gravitational force AND heavier things have a lower acceleration. It turns out that these two effects exactly cancel to make falling objects have the same acceleration regardless of mass.
Lets see
According to Newton's second law
[tex]\\ \rm\rightarrowtail F=ma[/tex]
F denotes to forcem denotes to massa denotes to acceleration[tex]\\ \rm\rightarrowtail F\propto m[/tex]
If mass is more force of gravity is more.[tex]\\ \rm\rightarrowtail m\propto \dfrac{1}{a}[/tex]
If mass is more acceleration is less or air resistance is less .So heavier objects fall faster than lighter ones .
what is the ke of a 800 tonnes train travelling at a speed of 108 km/h note 1 tonne =1000 kg
What causes competition among organisms?
Answer:
Whats up Bmw,
The organisms is caused when both the organisms or species are harmed, which is limited supply of at least one resource from food or even water used by both can be a factor.
Explanation:
Hope I helped you, and let me know if you need help on anything else :p
Answer:
Limited resources lead to competition between organisms
Explanation:
Competition is a negative interaction that occurs among organisms whenever two or more organisms require the same limited resource. All organisms require resources to grow, reproduce, and survive. However, organisms cannot acquire a resource when other organisms consume or defend that resource.
what two elements take up the most space in the universe
Answer:
helium and hydrogen
Explanation:
describe momentum with examples
Answer:
Momentum is defined as the amount of motion occurring in something that is moving, or the force that drives something forward to keep it moving. An example of momentum is how quickly a car is moving down a hill.
Two positive .00008 C charges are set 2.0 m apart as shown.
The direction of the electric force on charge 2 is to the
Cannot be determined
Down
Left
Up
Right
The direction of the electrostatic force on the second charge (charge 2) will be away from the first charge (charge 1).
Electrostatic force between the two chargesThe electrostatic force between the two charges is determined with Coulomb's law;
F = kq²/r²
F = (9 x 10⁹ x 0.0008²)/(2)²
F = 1,440 N
Direction of the electrostatic forceSince the two charges are the same (positive), the direction of the electrostatic force on the second charge (charge 2) will be away from the first charge (charge 1).
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Which characteristics describe a spiral galaxy? check all that apply. is shaped like a pinwheel has no new star formation contains a lot of gas and dust is smaller than other types of galaxies has sites of active star formation within its arms
It is shaped like a pinwheel describing a spiral galaxy. A flat, rotating disk containing stars, gas, and dust, as well as a central concentration of stars known as the bulge, makes up most spiral galaxies.
What is a spiral galaxy?Spiral galaxies are a type of galaxy first described by Edwin Hubble are part of the Hubble sequence.
A flat, rotating disk containing stars, gas, and dust, as well as a central concentration of stars known as the bulge, makes up most spiral galaxies.
Many of these are surrounded by a fainter halo of stars, many of which are found in globular clusters.
The Pinwheel Galaxy is a spiral galaxy located approximately 21 million light-years from Earth. M101 is the name given to this swirling galaxy by scientists.
In the Northern Hemisphere, it can be found in the constellation Ursa Major, also known as the "Big Dipper." Binoculars or a small telescope can be used to see if the sky is clear and dark.
Hence it is shaped like a pinwheel describing a spiral galaxy.
To learn more about the spiral galaxy refer to the link;
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in this experiment, we use a slotted mass set (containing masses 50 g, 100 g, 200 g, 500 g) and a digital scale with a 0.1 g precision. How is the error in the biceps force determined
The error in the biceps force is determined from the ratio of the precision of the mass measurement and actual mass measurement.
Error in measurementThe error obtained in the measurement of the bicep force is determined from the precision measurement of the masses, since the product of mass and acceleration gives the force applied to the biceps.
F = ma = mg
where;
F is force on the bicepsm is mass a is accelerationg is acceleration due to gravityError percent = (precision/measured mass) x 100%
Error percent = (0.1/50) x 100% = 0.2%
Error percent = (0.1/100) x 100% = 0.1%
Error percent = (0.1/200) x 100% = 0.05%
Error percent = (0.1/500) x 100% = 0.02%
Thus, the error in the biceps force is determined from the ratio of the precision of the mass measurement and actual mass measurement.
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The dehydration butanol on alumina is carried out over a silica-alumina catalyst at 680 K.
CH3CH2CH2OH →CH3CH = CHCH3 + H2O
The rate law iswith k = 0. 054 mol/gcat·h·atm and KBu = 0. 32 atm^–1. Pure butanol enters a thin-tubed, packed-bed reactor at a molar flow rate of 50 kmol/hr and a pressure of 10 atm (1013·kPa).
Required:
a. What PBR catalyst weight is necessary to achieve 80% conversion in the absence of pressure drop?
b. What "fluidized CSTR" catalyst weight is necessary to achieve 80% conversio?
A) The PBR catalyst weight that is required to achieve 80% conversion in the absence of pressure drop is : 370 mg
B) The fluidized CSTR catalyst weight necessary to achieve 80% conversion is : 995.025 g
A) Determine the PBR catalyst weightTo calculate the PBR catalyst weight required to achieve 80% conversion in the absence of pressure drop we will apply the equation below
w = [tex]\frac{V_{o} }{KC_{ao}(1/x - 1 ) }[/tex] ---- ( 1 )
insert values into equation ( 1 )
w = [tex]\frac{50 kmol}{0.54 * 10 (\frac{1}{0.8}) * 1 }[/tex]
PBR catalyst weight ( w ) = 370 mg
B) Determine the fluidized CSTR catalyst weight necessary to achieve 80% conversion
applying the equation below
W = [tex]\frac{Fbwx}{-r'Bu}[/tex]
= [tex]\frac{50kmol/r * 0.8}{0.042mol/gcat.h}[/tex]
= 995.025 gcat
Hence we can conclude that The PBR catalyst weight that is required to achieve 80% conversion in the absence of pressure drop is : 370 mg The fluidized CSTR catalyst weight necessary to achieve 80% conversion is : 995.025 g.
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if a particle performing shm of amplitude 10 cm at what distance from the mean position is the kinetic energy 2 time the potential energy
The equation for kinetic energy of shm system is given by;
KE=0.5mw²(A²-x²)
where m is the mass of the object
w² is the angular frequency
A is the amplitude
and x is the positive
The equation for the potential energy is given by;
PE=0.5mw²x²
Solve KE=2PE and you get ur answer
[tex] \sf{\blue{«} \: \pink{ \large{ \underline{A\orange{N} \red{S} \green{W} \purple{E} \pink{{R}}}}}}[/tex]
Given:
Amplitude [tex]\displaystyle\sf A = 10\,\text{cm} = 0.1\,\text{m}[/tex]
We want to find [tex]\displaystyle\sf x[/tex] such that the kinetic energy [tex]\displaystyle\sf KE[/tex] is twice the potential energy [tex]\displaystyle\sf PE[/tex].
Using the formulas for kinetic energy and potential energy in SHM:
[tex]\displaystyle\sf KE = \dfrac{1}{2}mv^{2}[/tex]
[tex]\displaystyle\sf PE = \dfrac{1}{2}kx^{2}[/tex]
Since we are considering the same particle, the mass [tex]\displaystyle\sf m[/tex] cancels out. Therefore, we can compare the expressions for [tex]\displaystyle\sf KE[/tex] and [tex]\displaystyle\sf PE[/tex]:
[tex]\displaystyle\sf \dfrac{1}{2}kx^{2} = 2\left(\dfrac{1}{2}kA^{2}\right)[/tex]
Simplifying this equation:
[tex]\displaystyle\sf kx^{2} = 2kA^{2}[/tex]
Dividing both sides by [tex]\displaystyle\sf k[/tex]:
[tex]\displaystyle\sf x^{2} = 2A^{2}[/tex]
Taking the square root of both sides:
[tex]\displaystyle\sf x = \sqrt{2}A[/tex]
Substituting the value of [tex]\displaystyle\sf A[/tex]:
[tex]\displaystyle\sf x = \sqrt{2} \times 0.1\,\text{m}[/tex]
Calculating the value:
[tex]\displaystyle\sf x = 0.1414\,\text{m}[/tex]
Converting to centimeters:
[tex]\displaystyle\sf x = 0.1414 \times 100\,\text{cm}[/tex]
[tex]\displaystyle\sf x \approx 14.14\,\text{cm}[/tex]
Therefore, the distance from the mean position at which the kinetic energy is twice the potential energy is approximately [tex]\displaystyle\sf 14.14\,\text{cm}[/tex].
[tex]\huge{\mathfrak{\colorbox{black}{\textcolor{lime}{I\:hope\:this\:helps\:!\:\:}}}}[/tex]
♥️ [tex]\large{\underline{\textcolor{red}{\mathcal{SUMIT\:\:ROY\:\:(:\:\:}}}}[/tex]
How do you calculate the total current of a parallel circuit?
Answer:
The total current in the circuit is the current that travels thru a single conductor that connects to the parallel circuit (current from a electromotive source, etc.)
I = I1 + I2 + I3 ...... In
If n items are in parallel with another, then I is the total current passing thru these items