The vibration frequency in Hz is 2.7 Hz. This is calculated by taking the inverse of the vibration period (1/0.370 s = 2.7 Hz).
The vibration frequency in radians per second is 17.1 rad/s. This is calculated by taking the vibration frequency in Hz (2.7 Hz) and multiplying it by 2π (2.7 Hz x 2π = 17.1 rad/s).
The wavelength of this vibration is 1.13 m. This is calculated by taking the length of the spring (3.05 m) and dividing it by the harmonic number (3.05 m/2 = 1.13 m).
The product of the frequency, in Hz, and the wavelength is 3.06 Hz-m. This is calculated by taking the frequency in Hz (2.7 Hz) and the wavelength (1.13 m) and multiplying them together (2.7 Hz x 1.13 m = 3.06 Hz-m).
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a mass on a spring, moving with simple harmonic motion, vibrates with a frequency of 4.0 hz and an amplitude of 8.0 cm. if x = 8.0 cm when t = 0, find its speed when t = 3 s.
The speed at t = 3 sec is 0.025 meter
What is simple harmonic motion ?Simple harmonic motion is described as a periodic motion of a point along a straight line, such as its acceleration is constantly towards a given point in that line and is proportional to the distance point .
According to the given information
For Simple Harmonic Motion of mass m on spring with spring constant K
The frequency of SHM is given by
f = [tex]\left(\frac{1}{2 \pi}\right) \sqrt{\frac{k}{m}}[/tex]
Rearranging
[tex]& \left(f^2\right)(2 \pi)^2=\frac{k}{m} \\[/tex]
[tex]& k=m\left(f^2\right)(2 \pi)^2[/tex]
Substituting
[tex]& k=(0.2 \mathrm{~kg})(4.0 \mathrm{~Hz})^2(2 \pi)^2[/tex] \\
[tex]& k=(0.2 \times 4.0 \times 4.0 \times 4 \times \pi \times \pi) \\[/tex]
[tex]& k=126.33 \mathrm{~N} \cdot \mathrm{m}^{-1} \\[/tex]
[tex]& k \approx 126 \mathrm{~N} \cdot \mathrm{m}^{-1} \\[/tex]
At t = 0 amplitude is maximum
Simple Harmonic Motion is of the form
x=A [tex]\cos (\omega x)[/tex]
At t = 0 s , x = A =[tex]8 \mathrm{~cm}$[/tex]
When t = 3 s
x = [tex](8 \mathrm{~cm}) \cos [(\omega)(3)][/tex]
Given
[tex]f=4 \mathrm{~Hz} \\[/tex]
[tex]& \omega=2 \pi f \\& \omega=2 \pi(4 \mathrm{~Hz}) \\& \omega=8 \pi \mathrm{Hz}[/tex]
Substituting the above values
[tex]& x=(8 \mathrm{~cm}) \cos [(8 \times 3.14)(3)] \\& x=(8 \mathrm{~cm}) \cos [92.99 \mathrm{rad}] \\& x=(8 \mathrm{~cm})(0.309) \\& x=2.47 \mathrm{~cm} \\& x=2.5 \times 10^{-2} \mathrm{~m} \\\left \{ {{y=2} \atop {x=2}} \right.[/tex]
x = 0.025 meters
The speed at t = 3 sec is 0.025 meter
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Using the CER format (claims, evidence and reasoning), answer the following question: Three resistors are connected in series: (14 Ohms, 2.5 Ohms and 22 Ohms). If all these resistors were light bulbs, which would be the brightest? (CLEARLY IDENTIFY YOUR CLAIM, EVIDENCE AND REASONING.)
If all these resistors were light bulbs, 22Ω resistor is greatest, it would be the brightest bulb.
Brightness of bulb depends on voltage or current?Voltage and current both affect a bulb's brightness. The power affects brightness. The brightness will therefore rise whether the current or voltage is increased.A long bulb will shine when a round bulb is connected in series, but not the other way around. Because they are connected in series, both of them have the same current flowing through them, but the long bulb has a higher voltage across it due to its higher resistance (although if V=IR is not strictly followed, voltage drop does depend on resistance).However, if you connect a round and a long bulb in parallel, the round bulb will shine brighter because the voltage now equals across both bulbs, but the current through the round bulb is greater.Learn more about Brightness of bulb refer to :
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in an ac circuit, why is the average power for an inductor and a capacitor zero, but not for a resistor?
In a capacitor, no energy is lost because the capacitor alternately stores charge and then gives it back again.
In alternating current (AC) circuits, instead of a constant voltage supplied by a battery, the voltage oscillates in a sine wave pattern, varying with time as V = Vo sin ωt.Consider now a circuit which has only a capacitor and an AC power source (such as a wall outlet). A capacitor is a device for storing charging. It turns out that there is a 90° phase difference between the current and voltage, with the current reaching its peak 90° (1/4 cycle) before the voltage reaches its peak. Put another way, the current leads the voltage by 90° in a purely capacitive circuit.CV = Q relationship between current and the flow of change: I = ∆Q/∆tThe AC power supply produces an oscillating voltage. We should follow the circuit through one cycle of the voltage to figure out what happens to the current .In a capacitor, no energy is lost because the capacitor alternately stores charge and then gives it back again.To know more about circuits visit:
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a star's color tells us ... question 8 options: its rotational speed. how much energy a star produces. both how much energy it produces and its surface temperature. its surface temperature.
A star's color mostly indicates its surface temperature. However, it could also be used to estimate the age of the star.
There are several types of stars according to their colors which include the following;
O-class starsM-class starsB-class starsA-class starsF-class starsG-class starsThe O-class stars are often blue in color and they are the hottest while the M-class stars are red in color and their temperatures are very low compared to the others, making them the coldest type of stars.
The color of the star is not a major factor in the estimation of the age of the star though it could be used sometimes.
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A helium-filled balloon (whose envelope has a mass of mb=0.250kg) is tied to a uniform string of length ℓ=2.00m and mass m = 0.0500 kg. The balloon is spherical with a radius of r = 0.400 m. When released in air of temperature 20∘C and density rhoair=1.20kg/m3, it lifts a length h of string and then remains stationary. We wish to find the length of string lifted by the balloon. (a) When the balloon remains stationary, what is the appropriate analysis model to describe it? (b) Write a force equation for the balloon from this model in terms of the buoyant force B, the weight Fb of the balloon, the weight FHe of the helium, and the weight Fs of the segment of string of length h. (c) Make an appropriate substitution for each of these forces and solve symbolically for the mass ms of the segment of string of length h in terms of mb, r, rhoair , and the density of helium rhoHe, (d) Find the numerical value of the mass ms. (e) Find the length h numerically.
got the ans
A helium-filled balloon (whose envelope has a mass of mb=0.250kg) is tied to a uniform string of length ℓ=2.00m and mass m = 0.0500 kg. The balloon is spherical with a radius of r = 0.400 m. When released in air of temperature 20∘C and density rhoair=1.20kg/m3, it lifts a length h of string and then remains stationary. We wish to find the length of string lifted by the balloon. (a) When the balloon remains stationary, what is the appropriate analysis model to describe it? (b) Write a force equation for the balloon from this model in terms of the buoyant force B, the weight Fb of the balloon, the weight FHe of the helium, and the weight Fs of the segment of string of length h. (c) Make an appropriate substitution for each of these forces and solve symbolically for the mass ms of the segment of string of length h in terms of mb, r, rhoair , and the density of helium rhoHe, (d) Find the numerical value of the mass ms. (e) Find the length h numerically.
an l-c circuit has an inductance of 0.380 h and a capacitance of 0.300 nf . during the current oscillations, the maximum current in the inductor is 1.20 a . part a what is the maximum energy emax stored in the capacitor at any time during the current oscillations? express your answer in joules.
0.08664 J is the maximum energy stored in the capacitor at any time during the current oscillations.
What is Electromagnetic Oscillation ?Within an LC circuit oscillates back and forth between the electric fields of the capacitor and the magnetic field of the inductor. This oscillation is known as electromagnetic oscillation.
Energy stored in the IC oscillations is
E= 1/2 LI²
Here,
Inductance (I) = 1.2 A
Capacitance (L) = 0.380 H
Now put the values in above formula, we get the energy as
[tex]E_{max} = \frac{1}{2} \times 1.2 \times (0.380)^2[/tex]
= 0.5 × 1.2 × 0.1444
= 0.08664 J
What is capacitance?
Capacitance is the capability of a material object or device to store electric charge. It is measured by the change in charge in response to a difference in electric potential, expressed as the ratio of those quantities.
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a 0.50-kg mass is attached to a spring of spring constant 20 n/m along a horizontal, frictionless surface. the object oscillates in simple harmonic motion and has a speed of 1.5 m/s at the equilibrium position. what is the amplitude of vibration?
The vibration amplitude of a spring with a constant of 20 N/m which has a speed of 1.5 m/s with a mass of 0.50 kg which is associated = 0.237 m.
Oscillation EnergyWhen an object oscillates on a spring, the kinetic energy and potential energy of the mass-spring system change with time.
The total energy (the kinetic energy + potential energy) is constant.
The kinetic energy of an object moving with speed v is:
½ mv².
The potential energy of a spring with a constant k is:
= ½ kx².
The total energy = ½ kx² + ½ mv² = ½ kA².
The total energy equation gives the general property of simple harmonic oscillations which is directly proportional to the square of the amplitude.
And, we have:
m = 0.50 kg
k = 20 N/m
v = 1.5 m/s
Remember, the total energy = ½ kA².
So,
A² = (m)(v)² / k
= (0.50) (1.5)² / 20
= 0.05625
A = [tex]\sqrt{0.05625}[/tex]
= 0.237 m
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the absolute value of the slope of the production possibility frontier at any point:
The absolute value of the slope of the production possibility frontier at any point gives the quantity of the good on the vertical axis that must be given up producing an additional unit of the good on the horizontal axis. (Option C)
The marginal rate of transformation (MRT) enables the economists to evaluate the opportunity costs to produce one extra unit of something. MRT refers to the absolute value of the slope of the production possibility frontier. The production possibility frontier (PPF) refers to a curve on a graph that demonstrates the possible quantities that can be produced of two products if both depend upon the same finite resource. For each point on the frontier displayed as a curved line, there is a different marginal rate of transformation, and this rate is based on the economics of producing the two goods. Hence, MRT is equal to the opportunity cost of an additional unit of the good on the horizontal axis.
Note: The question is incomplete as it is missing options which are A) gives the autarky price of the good on the vertical axis. B) is found by dividing the horizontal change by a vertical change. C) gives the quantity of the good on the vertical axis that must be given up to produce an additional unit of the good on the horizontal axis. D) gives the autarky price of the good on the horizontal axis relative to the autarky price of the good on the vertical axis.
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he noisy estabrook stifling team recently adopted a law to reduce the allowed sound level from leaf blowers from the current level of 96 db to 68 db. part description answer save status a. what is the ratio of the new allowed intensity to the previously allowed intensity?
The ratio of the newly allowed intensity to the previously allowed intensity is 3.1623 x 10⁻³.
Banks says a leaf blower makes 64 to 78 decibels at 50 feet. To the operator's ear, the noise is 95-115 decibels. According to Dangerous Decibels, a public-private partnership aimed at reducing hearing loss, typical speech is around 60 decibels, washing machines 75 decibels, and chainsaws 115 decibels.
Performance that fits your needs. Setting the motor to a low speed makes less noise. According to the American Green Zone Alliance, an organization dedicated to zero-emission landscaping, the average fan produces about 65 dB of noise. Compare this to the average noise level of a traditional gas backpack blower.
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a 0.60 kg ball is moving horizontally with a speed of 5.7 m/s when it strikes a vertical wall. the ball rebounds with a speed of 2.7 m/s. what is the magnitude of the change in linear momentum of the ball?
We can use the following equation to solve this problem:
Δp=m∣Vi−Vf∣(Where p is the momentum change, m is mass, Vi is initial velocity, and
Vf is final velocity)
Substitute the values given to us in the question:
Δp=(0.6)∣(5.7−(−2.7)∣
Δp=4.9 kg.m/s
Final answer: 4.9kg.m/s.
The change in momentum (Δp) is defined as the change in the mass times the velocity of an object. A force is required to change the momentum of an object. This applied force can increase or decrease momentum, or even change the orientation of an object.
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28102 a flat coil of wire consisting of 480 turns, each with an area of 70 cm, is positioned perpendicularly to a uniform magnetic field that increases its magnitude at a constant rate from -0.8 t to -0.75 t in 7.7 s. if the coil has a total resistance of 86 , what is the magnitude of the induced current when the field is -0.775 t?
The magnitude of current when a flat coil of wire consisting of 480 turns each with an area of 70 cm, is positioned perpendicularly to a uniform magnetic field that increases its magnitude at a constant rate from -0.8 t to -0.75 t in 7.7 s. if the coil has a total resistance of 86 is 0.025 A.
Given that magnetic flux is expressed as = NBA in this situation,
we know that N = number of turns and B = magnetic field.
We now know that the rate of change in magnetic flux will cause EMF in the coil, hence A = area of the loop.
EMF = NBA db/dt
Now, enter all variables to calculate the induced
EMF: (480)(70 * 10-2). [(-0.75) -(-0.8)]
According to Ohm's rule, current equals EMF divided by resistance, hence I = 2.18/86
I = 0.025 A
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two children of mass 20 kg and 30 kg sit balanced on a seesaw with the pivot point located at the center of the seesaw. if the children are separated by a distance of 500 cm, at what distance from the pivot point is the small child sitting in order to maintain the balance?
In this question, you need to determine the torque.
The formula for torque is
torque = weight * length of the lever arm in meters
Since we are given the mass of each child, we need to solve for their weights, which is found by multiplying their masses by the pull of gravity, which is 9.8 m/sec/sec.
This gives the weight of the 20 kg child to be 196 Newtons, and the weight of the 30-kg child to be 294 Newtons.
If the length between the 2 children is 0.5 meters, then let's say that the distance away that the heavier child is from the fulcrum is r.
That makes the distance that the lighter child is away from the fulcrum as 0.5 - r.
Now the sum of the torques must equal 0 if the seesaw is to remain balanced.
Because one torque is positive and one is negative, we can move the negative one over to the other side of the equals sign making them equal to each other, which is what rotational equilibrium is all about.
Here's our formula thus far:
196(0.5 - r) = 294r and
686 - 196r = 294r and
686 = 490r so
r = 1.4
Therefore, with the help of torque, we get, the heavier child is at the distance of 1.4 m and the lighter child is 3.5 - 1.4 = 2.1 m away.
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2) Forces F1, F2, and F3 act on the structure of Figure shown overhead view. We wish to put the structure in equilibrium by applying fourth force at a point such as P. The fourth force has vector components and Fh: We are given that &= 2.5 m, b-3.0 m, c-1.5 F1-22N, F2-12 N, F3-5 N.Find (a) Fv, (b) Fh, dan (c)
Forces Fv = 33N, Fh = 3.75 N, d=1.334m
a)For net force to be zero in vertical direction Fv = F1+ F2 = 33N
b)For net force to be zero in horizontal direction Fh = F3 = 3.75 N
c)Net torque about point O = 0
Fv.d - F2.b - F3.a= 0
33d - 10.5 x 3.3 - 3.75 x 2.5 = 0
d=1.334m
A force is a push or pull that an object experiences as a result of interacting with another object. There is a force acting on each object whenever two objects interact.
Contact forces are the kinds of forces that develop when two interacting objects appear to be in physical contact with one another. Frictional, tensional, normal, air resistance, and applied forces are some examples of contact forces.
When two things are interacting but are not physically touching each other, action-at-distance forces can still create a push or pull.
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on a snowy day, when the coefficient of friction μs between a car's tires and the road is 0.50, the maximum speed that the car can go around a curve is 14 mph.
The maximum speed that the car can go around a curve is 14 mph is 28.1 mph.
What is speed?
The speed at which an object's location changes in any direction. The distance traveled in relation to the time it took to travel that distance is how speed is defined. Since speed simply has a direction and no magnitude, it is a scalar number.
The force of friction acting on the car provides the centripetal force that keeps the car in circular motion around the curve, so we can write:
[tex]F=\mu m g=m \frac{v^2}{r} \text { (1) }[/tex]
where
[tex]$\mu$[/tex] is the coefficient of friction
[tex]$\mathrm{m}$[/tex] is the mass of the car
[tex]$\mathrm{g}=9.8 \mathrm{~m} / \mathrm{s}^{\wedge} 2$[/tex]is the acceleration due to gravity
[tex]$\mathrm{V}$[/tex] is the maximum speed of the car
r is the radius of the trajectory
On the snowy day,
[tex]$$\begin{aligned}& \mu=0.50 \\& v=20 \mathrm{mph}=8.9 \mathrm{~m} / \mathrm{s}\end{aligned}$$[/tex]
So the radius of the curve is
[tex]r=\frac{v^2}{\mu g}=\frac{(8.9)^2}{(0.50)(9.8)}=16.1 \mathrm{~m}$$[/tex]
Now we can use this value and re-arrange again the eq. (1) to find the maximum speed of the car on a sunny day, when [tex]$\mu=1.0$[/tex]. We find:
[tex]v=\sqrt{\mu g r}=\sqrt{(1.0)(9.8)(8.9)}=12.6 \mathrm{~m} / \mathrm{s}=28.1 \mathrm{mph}$$[/tex]
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Collisions in Saturn’s Rings : Each of the particles in the densest part of Saturn’s rings collides with another particle about every 5 hours. If a ring particle survived for the age of the solar system, how many collisions would it undergo ?
The ring particle would undergo roughly 8.3 trillion collisions over that period of time.
The age of the solar system is estimated to be 4.6 billion years. This means that a ring particle would undergo roughly 8.3 trillion collisions over that period of time. To calculate this number, we can use the following formula:
Number of collisions = Time (in hours) / Time between collisions (in hours) x Number of years
Number of collisions = 4.6 x 109 (years) x 24 (hours/day) x 365.25 (days/year) / 5 (hours)
Number of collisions = [tex]8.3 * 10^{12}[/tex] (collisions)
Therefore, the number of collisions in the ring are
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a force of 15n is used to push a box along the floor distance of 3 meters. find the amount of work done
Answer:
to find the amount of work done, you need to calculate the force applied to the box times the distance over which it is applied. In this case, the force applied to the box is 15N and the distance over which it is applied is 3 meters, so the amount of work done is 15N * 3m = 45N*m.
Explanation:
It's important to note that work is a scalar quantity, not a vector quantity. This means that it has only magnitude and no direction. The direction of the force applied to the box and the direction of the displacement of the box are not relevant in calculating the amount of work done.
Important Formulas:
[tex]w=Fd[/tex]
work(measured in joules) = force(measured in newtons) * distance(measured in meters)
__________________________________________________________
Given:
[tex]F=15N[/tex]
[tex]d=3m[/tex]
[tex]w=?[/tex]
__________________________________________________________
Finding work:
[tex]w=Fd[/tex]
[tex]w=15\times3[/tex]
__________________________________________________________
[tex]\fbox{w = 45J}[/tex]
a certain type o f elementary particle travels at a speed of 2.60x10^8 m/s at this speed the average lifetime is measured to be 4.76x10^-6s. what is the particle's lifetime at rest?
The particle's lifetime distance at rest is 1.2376 m.
Here, the particle's lifetime refers to the the distance in speed formula
Speed is the measure of average distance in a given time. It is the vector quantity.
The distance can be calculated by the product of speed and the time given.
Here, in this question, the total distance a certain elementary particle has traveled in its lifetime.
This can be determined by merely multiplying the speed with the lifetime of years.
Given,
Speed = 2.6×10⁸ m/s
Time = 4.76×10⁻⁶ s
Speed = distance / time
Distance = speed * time
Total distance = (2.6×10⁸ m/s)*(4.76×10⁻⁶ s)
Total distance = 1.2376 meters
Therefore, the distance travelled by the particle with the speed of 2.6×10⁸ m/s in the lifetime is 1.2376 m
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Label the structures of the hip. lliac crest lliac fossa Pubis Iliac crest Ischium Obturator membrane llium Obturator foramen
The femur, which is the thighbone, and the pelvis, which consists of the ilium, ischium, and pubis. The femoral head creates the ball of the hip joint, and the acetabulum creates the socket.
What tissues connect to the iliac crest?
Hip flexors, internal and external abdominal oblique muscles, erector spinae muscles, latissimus dorsi, transversus abdominis, and tensor fasciae latae are just a few of the significant abdominal and core muscles that are linked to the iliac crest.
What are the pelvis' four components?
The coccyx and sacrum make up the pelvic spine. The innominate bones are the pubic bone, ischial bone, and iliac bone that connect on either side.
Is the iliac crest the hip bone?
The largest of the three bones that make up the hip bone or bony pelvis, the ilium, has a conspicuous section called the iliac crest. A person will occasionally rest their hands on the curved section of the pelvis that creates the wing-like feature of the hip and lies close to the skin.
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. All of the following are major body tissue types except a. Epithelial tissue. b. Lymphatic tissue c. Connective tissue. d. Nervous tissue Submit
All of the following are major body tissue types except Lymphatic tissue.
What is tissue?Tissue is the mass of the cell of body of human.
The lymphatic system is an extensive network of vessels, nodes, and ducts that pass through almost all bodily tissues. It allows the circulation of a fluid called lymph through the body in a similar way to blood.
The lymphatic system is a network of vessels, nodes, and ducts that collect and circulate excess fluid in the body.
The lymphatic system is part of the immune system. It also maintains fluid balance and plays a role in absorbing fats and fat-soluble nutrients.
The lymphatic system drains excess fluid that accumulates in bodily tissue, filters out foreign bodies, and transports it back into the bloodstream.
Failures of the lymphatic system can cause swelling, venous dysfunction, and life threatening complications.
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what is the frequency of an electromagnetic wave that has the same wavelength as a 1.9 khz sound wave in water? express your answer with the appropriate units.
The wavelength of the electromagnetic wave is 1.58 * 10⁵m. Electromagnetic radiation is made up of electromagnetic field waves that travel through space carrying electromagnetic radiant energy.
Because of their diverse origins and effects on matter, electromagnetic waves of varying frequencies are given different names. Microwaves, radio waves, visible light, ultraviolet radiation, infrared radiation, X-rays, and gamma rays are in the order of increasing frequency and decreasing wavelength.
The relation between the wavelength, frequency, and speed is as follows:
ν = λf
Here, the speed of the electromagnetic wave is ν
Rearrange the above expression to get λ
λ = ν / f
The speed of electromagnetic waves in a vacuum is 3 * 10⁸ m/s.
Substitute 1.9kHz for f and 3 * 10⁸ m/s for ν in the above expression.
λ = ν / f
λ = ( 3 * 10⁸ m/s) / 1.9kHz
λ = ( 3 * 10⁸ m/s) / 1.9kHz (10³ Hz/ 1kHz)
λ = 157894 m
λ = 1.58 * 10⁵m
Thus, the wavelength of the electromagnetic wave is 1.58 * 10⁵m.
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How many possible combinations are there for the values of l and ml when n = 2?
Express your answer as an integer.
? = possible combinations
The possible combinations are for the values of l when n = 2 is two values 0,1 and ml is -1,0,1
The n is the principal quantum number
l is the azimuthal quantum number
ml is the magnetic quantum number.
The formula to find the azimuthal quantum number is
l = 0,1,2,3 .......n-1
If n = 2, the azimuthal quantum number,
l = 0, 1
Then, the ml can be found using the formula,
ml = 2l +1
For l = 0 , ml = 2(0) + 1
= 1
Therefore, ml will have only one value, which is 0
For l =1 , ml = 2(1) + 1
= 3
Therefore, the ml will have three values, they are -1,0,1
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Receptacle is defined as a point in
the electrical system where
electrical energy is
A. Uninstalled
C. Installed
B. Supplied for electrical use
D. Supplied for direct wiring
Receptacle is defined as a point in the electrical system where electrical energy is Installed.
What is receptacle?The Latin term receptaculum, which denotes a location to receive and keep items, is the source of the English word "receptacle."
Receptacles and electrical outlets are types of sockets that are used to create an electrical connection between a power source and an electronic device.
There are several different types of outlets, including two-pronged outlets, grounded outlets, tamper-resistant outlets, arc fault circuit interrupter outlets, surge suppression outlets, and USB outlets.
According to Section 210.52 of the US National Electrical Code, every kitchen, bedroom, living room, family room, and other room with a designated living area must have an electrical outlet. They must be placed at intervals of no less than twelve feet along the floor line.
Correct option: (B) Installed
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8. do the earth and the moon always cast shadows? what do we call the occurrence where the earth passes within the shadow of the moon? when the moon passes within the shadow of the earth?
Yes, they both cast shadows. A eclipse occurs when one enters the shadow of the other.
Solar eclipse: Earth in shadow of Moon.
Lunar eclipse: Moon in shadow of Earth.
A solar eclipse is the result of one celestial body being completely or partially obscured by another celestial body along the line of sight of an observer. A solar eclipse occurs when the moon passes between the earth and the sun, obscuring all or part of the sun's disk. A lunar eclipse occurs when the Moon passes through the Earth's shadow, making the Moon's surface completely or partially obscured.
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Stars begin burning helium to carbon when the temperature rises in the core. This temperature increase is caused by a. gravitational collapse. b. fusing hydrogen into helium in the core. c. fusing hydrogen into helium in a shell around the core. d. degenerate-electron pressure.
Stars begin burning helium to carbon when the temperature rises in the core. This temperature increase is caused by fusing hydrogen into helium in the core. The correct answer is B.
In the universe, hydrogen fusion is the most common way to produce energy. At the centers of our Sun and other stars, where it has a density more than 70 times greater than that of steel, the gravitational force is used to fuse hydrogen. As a result, fusion produces all of the heat and light on Earth so the temperature increase. Stars begin burning helium to carbon when the temperature rises in the core. Chemical element helium has the atomic number 2 and the letter He after it. It is a colorless, odorless, tasteless, inert, monatomic gas that is the first member of the noble gas group in the periodic table and is not toxic.
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a car accelerates uniformly from rest to 25 m/s over a distance of 30 meters. what is the acceleration of the car?
Answer:
10.4 m/s²
Explanation:
use the formula: V² = Vo² - 2aΔx
Plug in the known values then solve for a. Vo = 0 because the car starts from rest.
(25 m/s)² = 0 + 2a(30m)
a = (625 m²/s²)/(2)(30m) = 10.4 m/s²
Would someone PLEASE HELP ME
Acceleration of this helicopter is: 7 m/sec².
What is speed?Velocity is the pace and direction of an item's movement, whereas speed is the time rate at which an object is travelling along a route. In other words, although velocity is a vector, speed is a scalar quantity.
Given that,
Initial Speed :- 25 m/s
Final Speed :- 60 m/s
Time :- 5 sec
Now by using motion equation ..
v = u + at
60 m/sec = 25 m/sec + (a × 5 sec)
or, 5a = 60 - 25
or, a = 35m/sec /5 sec
or, a = 7 m/sec²
Thus, acceleration of this helicopter is: 7 m/sec².
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if you double the radiating surface area of a star while keeping its temperature constant, its power output increases by a factor of
A star's power output doubles when its radiating surface area doubles while its temperature remains constant.
Relation between power output and radiating surface area:When referring to black body radiation, however, Wikipedia maintains that the radiation released is proportionate to the surface. If you increase the surface area, the radiation will also double.
If you consider a radiator (the sun, a lightbulb, etc.) to have constant power (for example, 60 W), you could indeed increase its surface in just about any way you like, provided the material just diffracts radiation rather than absorbing it. However, the power it emits will never change; it will always be, for example, 60 W. Simply put, this is energy conservation. It is not a temperature issue.Thus, a star's power output doubles when its radiating surface area doubles while its temperature remains constant.
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a block of ice at 0 is sliding on a horizontal surface. the inital speed of the ice is 7.90 and the final speed is 3.80. determine mass of ice that melts
Given, mass of block 30kg, initital velocity 6.1m/s, final velocity=4.5m/s, change in kinetic energy= mvi^2/2-mvi/2- mvf2/2, KE= 254.4J change in KE= heat generated by friction L=3.4*10^5J/kg, 254.4= m*3.4*10^5, m=0.748gm.
In physics, how do you solve for mass?There are numerous methods for calculating an object's mass, including:
Mass Equals volume * density (m = V). The mass of an object can be calculated by multiplying its density by its volume because density is a measure of mass per unit of volume. Mass equals force times acceleration (m=F/a). Gravitational acceleration and mass are equal (m=W/g).
What is the center of mass formula?Center of Mass in a System of Two Particles (m1+m2) rcm equals (m1 r1+m2 r1). The sum of the products of the masses of the two particles and their respective position vectors equals the product of the total mass of the system and the position vector of the center of mass.
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Since v = lambda f, the speed v of a wave depends on its wavelength lambda. True False
False, Since v = lambda f, a wave's velocity v is independent of its wavelength lambda. mainly because the medium's characteristics affect the wave's speed.
For instance, the elastic and inertial properties of the medium affect the wave's speed for a mechanical wave. Wavelength Simply said, the wavelength is the separation between the wave crests. Additionally, a wide variety of objects move in waves of varying sizes, including light, air, water, strings, and air (which are all types of waves). In addition, we use the Greek symbol lambda to denote the wavelength of the wave (). But most people are unaware that there is a formula used to calculate wavelength.
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The op amp in the circuit in Fig. P5.1 is ideal. a) Label the five op amp terminals with their names. b) What ideal op amp constraint determines the value of tn? What is this value? c) What ideal op amp constraint determines the value of (vp−vn)? What is this value? d) Calculate vc
The value of (vpvn) depends on the open loop voltage gain of an ideal op amp. The difference in voltage that appears across the op amp's inverting and non-inverting terminals is limited to 0 V by the infinite open loop voltage gain of an ideal op amp. Therefore, vpvn=0 V has the value it does.
What does the op-amp voltage equation mean?
vd = VO/A is a formula that is created by dividing the output voltage by the op-amp gain. For instance, an op-amp with a gain of 100000 needs a differential input voltage of at least 50 volts in order to output 5 volts.
What is the op-amp equivalent circuit?
Figure 2 depicts the analogous circuit model of an op-amp. The differential input voltage, Vi = Vp Vn, determines the voltage. The device's input resistance (Ri) and output resistance (Ro) are one and the same. The open loop gain is the name given to gain parameter A.
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