The longest-wavelength electromagnetic radiation that can eject a photoelectron from gold is 475.6 nm and this is in visible range.
To calculate the longest-wavelength electromagnetic radiation that can eject a photoelectron from gold, we need to determine the threshold energy required to overcome the work function of gold.
The energy (E) of a photon can be calculated using the equation E = hc/λ, where h is Planck's constant (approximately 4.1357 × 10^(-15) eV·s), c is the speed of light (approximately 2.998 × 10^8 m/s), and λ is the wavelength of the radiation.
To eject a photoelectron from gold, the energy of the incident photon must be greater than or equal to the work function (Φ) of gold. Given that the work function for gold is 5.17 eV, we can convert it to joules by multiplying by the conversion factor 1.602 × \(10^{-19}\) J/eV.
Φ = 5.17 eV × 1.602 × \(10^{-19}\) J/eV ≈ 8.29 × \(10^{-19}\) J
Now, we can calculate the longest wavelength λ that corresponds to this threshold energy:
E = hc/λ
8.29 × \(10^{-19}\) J = (4.1357 × \(10^{-15}\) eV·s) × (2.998 × \(10^{8}\)m/s) / λ
Solving for λ, we find:
λ ≈ 4.756 × \(10^{-7}\)m or 475.6 nm
Therefore, the longest-wavelength electromagnetic radiation that can eject a photoelectron from gold is approximately 475.6 nm. This falls within the visible range of the electromagnetic spectrum, specifically in the yellow-green region. So, the ejected photoelectron would not be visible, but the incident radiation would appear yellow-green to the human eye.
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What is the mass of a car that weighs 12kN?
Will give brainliest!!!!
Answer:
The answer is 1200 Kg
Explanation:
Given;Weight of car 12000 NTo Find;Mass of car = ?Formula;W = m × gwhere, W = weightm = mass,g = Acceleration due to gravity = 10 m/s²Now,
W = mg
12000 = m ÷ 10
m = 12000 ÷ 10
m = 1200 kg
Thus, The mass of car is 1200 kg or 1.2k Kg.
-TheUnknownScientist 72
mass does not vary from place to place why?
Answer:
It is always constant unlike weight
Do diamonds have a melting point?
Yes, diamonds do have a melting point. Diamonds are one of the few substances that have an extremely high melting point.
The melting point of a diamond is approximately 3550 °C (6422 °F). This is much higher than the melting point of most other substances, which makes diamonds incredibly resistant to heat.Diamond is a solid form of the element carbon, with its atoms arranged in a crystal structure known as the diamond cubic crystal structure. At ambient temperature and pressure, another solid form of carbon known as graphite is the chemically stable form of carbon; nevertheless, diamond is metastable and transitions to it at a very slow pace.
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Yes, diamonds do have a melting point. Diamonds are one of the few substances that have an extremely high melting point.
The melting point of a diamond is approximately 3550 °C (6422 °F). This is much higher than the melting point of most other substances, which makes diamonds incredibly resistant to heat.Diamond is a solid form of the element carbon, with its atoms arranged in a crystal structure known as the diamond cubic crystal structure. At ambient temperature and pressure, another solid form of carbon known as graphite is the chemically stable form of carbon; nevertheless, diamond is metastable and transitions to it at a very slow pace.
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I really need help with this! It is my last assignment of the year!! I will reward whatever I can give for a correct answer!!!!
Answer:
Explanation:
A galvanometer has an internal resistance of (RG-59), and a maximum deflection current of IGMax = 15 mA). If the shunt resistance is given by : Max RS (16) mar RG I max - (16) max Then the value of the shunt resistance Rs (in) needed to convert it into an ammeter reading maximum value of 'Max = 500 mA is:
The value of the shunt resistance Rs is calculated to be approximately (1.02 Ω).To convert a galvanometer into an ammeter with a maximum reading value of 500 mA, a shunt resistance (Rs) needs to be added.
The value of the shunt resistance can be calculated using the formula Rs = (RG * IMax) / (IMax - Max), where RG is the internal resistance of the galvanometer, IMax is the maximum deflection current of the galvanometer (15 mA), and Max is the desired maximum current reading of the ammeter (500 mA).
To convert a galvanometer into an ammeter, a shunt resistance is connected in parallel with the galvanometer.
The shunt resistance diverts a portion of the current, allowing the remaining current to flow through the galvanometer.
By choosing an appropriate value for the shunt resistance, the ammeter can be calibrated to measure higher currents.
In this case, the shunt resistance value (Rs) can be determined using the formula Rs = (RG * IMax) / (IMax - Max), where RG is the internal resistance of the galvanometer, IMax is the maximum deflection current of the galvanometer (15 mA), and Max is the desired maximum current reading of the ammeter (500 mA).
Substituting the given values,
we have Rs = (RG * 15 mA) / (15 mA - 500 mA). Simplifying further, Rs = (RG * 15 mA) / (-485 mA).
Rearranging the equation,
we get Rs = - RG * (15 mA / 485 mA). Since RG is given as (RG-59), we substitute it into the equation to obtain Rs = - (RG-59) * (15 mA / 485 mA).
The result of this calculation gives us the value of the shunt resistance Rs, which is approximately 1.02 Ω. Therefore, a shunt resistance of approximately 1.02 Ω should be added in parallel with the galvanometer to convert it into an ammeter with a maximum reading value of 500 mA.
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a 4 kg ceiling fan is placed 2.5m above the floor. what is the gpe of the earth-ceiling fan system relative to the floor?
GPE of the earth-ceiling fan system relative to the floor is 98 J .
What is GPE?Potential energy that a massive object has in relation to another massive object due to gravity is called Gravitational potential energy. It is this energy associated with the gravitational field, which is converted to kinetic energy when the objects fall towards each other. It represents the potential an object has to do work being located at a particular position in a gravitational field.
Given mass of fan= 4kg
height, h = 2.5m
GPE = m*g*h
g is the acceleration due to gravity which is 9.8
GPE= 4 * 2.5 * 9.8
GPE = 98J
Hence, GPE of the earth-ceiling fan system relative to the floor is 98 J .
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A race car traveling northward on a straight, level track at a constant speed travels 0.760 km in 21.0 s. The return trip over the
same track is made in 26.0 s.
(a) What is the average velocity of the car in m/s for the first leg of the run?
m/s
(b) What is the average velocity (in m/s) for the total trip?
m/s
The average velocity of the car in m/s for the first leg is 36.2 m/s and the average velocity (in m/s) for the total trip is 7 m/s
What is Speed and Velocity ?Speed is the distance travelled per time taken. The S.I unit is m/s. The average speed is the ratio of the total distance travelled to the to time taken. While velocity is the distance travelled in a specific direction per time taken
Given that a race car traveling northward on a straight, level track at a constant speed travels 0.760 km in 21.0 s. The return trip over the same track is made in 26.0 s.
(a) The average velocity of the car in m/s for the first leg of the run will be
Velocity = (0.760 x 1000)/ 21
Velocity = 760 / 21
Velocity = 36.2 m/s
(b) The average velocity (in m/s) for the total trip will be
36.2 - (0.760 x 1000)/ 26
36.2 - (760) / 26
36.2 - 29.2
7 m/s
Therefore, the average velocity of the car in m/s for the first leg is 36.2 m/s and the average velocity (in m/s) for the total trip is 7 m/s
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is calcium bromide a element, compound, solution, or heterogenous mixture
Calcium Bromide, commonly known as calcium dibromide, is an ionic compound since the second element is a nonmetal, resulting in an ionic compound. It is referred to as a hydrated salt.
What is a Compound?A chemical compound is a material made up of several similar molecules that include atoms from more than one chemical element and are kept together by chemical bonds. A molecule made up of only one element's atoms is hence not a compound.
What is a solution?A solution is a form of homogenous combination made of two or more components in chemistry. A solute in such a combination is a material that has been dissolved in another substance known as a solvent.
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Michael reaches the end of his route and slowly comes to a stop, reaching 1 poin
a final velocity of O m/s and ending his 2 m/s run. If it took him 4 seconds to
come to a stop, what was his acceleration? Don't forget units and
directions if appropriate?
Your answer
A student has focused the image of an object of height 3cm on a white screen using a concave mirror of focal length 12cm. If the distance of the object from the mirror is 18cm , find the values of the following:
(i) Distance if the image from the mirror
(ii) Height of the image
Need answer for this question
To find the values of the distance if the image is from the mirror,
Height of object, h = 3 cm
Distance of object from mirror, u = -18 cm (negative sign indicates that the object is placed on the left side of the mirror)
Focal length of mirror, f = -12 cm (negative sign indicates that the mirror is concave)
We can use the mirror formula to find the distance of the image from the mirror:
1/f = 1/u + 1/v
where v is the distance of the image from the mirror.
Substituting the values of u and f, we get:
1/-12 = 1/-18 + 1/v
Simplifying the equation, we get:
v = -36 cm (negative sign indicates that the image is formed on the left side of the mirror)
Therefore, the distance of the image from the mirror is 36 cm.
What is the Height of the image?To find the height of the image, we can use the magnification formula:
m = -v/u
where m is the magnification of the image.
Substituting the values of v and u, we get:
m = -(-36)/(-18) = 2
Since the magnification is positive, the image is upright and enlarged.
The height of the image can be found using the formula:
h' = m * h
where h' is the height of the image and h is the height of the object.
Substituting the values of m and h, we get:
h' = 2 * 3 = 6 cm
Therefore, the height of the image is 6 cm.
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According to Carl Rogers, three conditions are necessary to promote growth in personality. These are Group of answer choices a. honesty, sincerity, and empathy b. genuineness, acceptance, and empathy c. high self-esteem, genuineness, and acceptance d. high self-esteem, honesty and empathy
According to Carl Rogers, a renowned humanistic psychologist, three essential conditions promote growth in personality. These conditions are genuineness, acceptance, and empathy. The correct option is b.
Rogers believed that these core components are necessary for a therapist to create a supportive and non-judgmental environment, ultimately enabling an individual to experience personal growth and self-actualization.
Genuineness, also referred to as congruence, refers to the therapist's authenticity and honesty when interacting with the client. The therapist must be true to themselves and transparent, ensuring that their verbal and non-verbal communications are consistent.
Acceptance, or unconditional positive regard, is the therapist's non-judgmental attitude towards the client. The therapist must accept the client's feelings, thoughts, and experiences without imposing conditions or evaluations. This acceptance fosters an environment where the client feels safe to explore their emotions and thoughts without fear of judgment.
Empathy is the therapist's ability to understand and appreciate the client's perspective and feelings on a deep level. The therapist should communicate this understanding to the client, helping them feel valued and heard. Empathy fosters a strong therapeutic relationship, creating a supportive environment for personal growth.
In summary, Carl Rogers believed that for an individual to experience growth in personality, they need to engage in a therapeutic relationship characterized by genuineness, acceptance, and empathy. These conditions create a safe space for self-exploration and promote personal development.
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1. What makes IRON MAN a moral/ethical PLURALIST
(pluralism)?
2. Provide evidence from a Marvel movie script or scene in which
IRON MAN demonstrated his moral/ethical pluralism.
***Please help. Thank
Iron Man (aka Tony Stark) is a moral/ethical pluralist, as he considers and includes various ethical perspectives when deciding.
Iron Man exhibits moral/ethical pluralism in some MCU instances. An example is in "Captain America: Civil War" (2016). Avengers split over regulation, Iron Man vs Captain America.
What is pluralismPluralism, as a philosophical perspective, acknowledges that an array of ethical frameworks and moral values exist, highlighting the need to take a broad spectrum of perspectives rather than subscribing to only one moral theory.
A relevant illustration is noticeable in the film known as "Captain America: Civil War" (2016). The Avengers are split into two groups in this movie, with Iron Man and Captain America each leading a faction. The reason for their division is their contrasting views on the control and monitoring of their actions.
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How much heat is needed to raise the temperature of 100.0 g of water by 85.0°C ? A. 8,500 J 35,500 J B. C. 1.1 J
The quantity of heat required to raise the temperature of the water is approximately 35,500 J.
Heat required to raise the temperature of water
The quantity of heat required to raise the temperature of the water is calculated as follows;
H = mcΔθ
H = 100 x 4.18 x 85
H = 35,530 J
Thus, the quantity of heat required to raise the temperature of the water is approximately 35,500 J.
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A current-carrying wire is placed in a region with a uniform magnetic field. The wire experiences zero magnetic force. Explain.
The magnetic force experienced by the wire is zero because the direction of the current is parallel to the direction of the magnetic field.
The magnetic force experienced by a current-carrying wire is given by the formula F = BIL sinθ, where F is the magnetic force, B is the magnetic field strength, I is the current, L is the length of the wire in the magnetic field, and θ is the angle between the direction of the current and the magnetic field.
When the current is parallel to the magnetic field, θ is equal to zero, and sinθ is also equal to zero, which means that the magnetic force experienced by the wire is zero. Therefore, the wire experiences zero magnetic force when the current is parallel to the magnetic field.
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the coefficient of kinetic friction between the block and the table is 0.320. find the distance d from the box to the edge of the table if it takes 1.5 s for the box to reach the edge once it begins to move.
The distance d from the box to the edge of the table if it takes 1.5 s for the box to reach the edge once it begins to move is 1 m
μk = 0.32
t = 1.5 sec
For mass B,
mBg - T = mB a
For mass A,
T - F f = mA a
T - μKmAg = mAa
a = 1.35 × 9.8 - 0.32× 3 × 9.8/ 4.35
a = 0.88 m/\(S^{2}\)
vi = 0
d = Vi t + 1/2 a\(t^{2}\)
distance d = 0.99 ≈ 1m
Distance is a scalar quantity that describes "how much ground an object has covered" while moving. Displacement is a vector quantity that describes "how far out of place an object is"; it represents the overall shift in position of the object. Distance is a measurement of how far apart two things or locations are, either quantitatively or occasionally qualitatively. Distance in physics or common language can refer to a physical length or an estimate based on other factors (e.g. "two counties over"). The term is also frequently used metaphorically to denote a measurement of the degree of difference between two similar objects (such as statistical distance between probability distributions or edit distance between strings), given that spatial cognition is a rich source of conceptual metaphors in human thought.
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Using your Periodic Table, which element below has the smallest atomic radius? A.) Sodium, B.) Chlorine, C.) Phosphorus, D.) Iron
How is Charge conserved?
charge conservation, in physics, constancy of the total electric charge in the universe or in any specific chemical or nuclear reaction. The total charge in any closed system never changes, at least within the limits of the most precise observation. In classical terms, this law implies that the appearance of a given amount of positive charge in one part of a system is always accompanied by the appearance of an equal amount of negative charge somewhere else in the system; for example, when a plastic ruler is rubbed with a cloth, it becomes negatively charged and the cloth becomes positively charged by an equal amount.
If someone replenishes the tree population in a forest ecosystem, how
might this affect the producers already living there?*
a: Increase in competitionfor biotic factors
b:decrease in competition for abiotic factors
c:increase in competition for abiotic factors
d: decrease in competition for biotic factors
Answer:
it would be c, an increase in competition for abiotic factors because if more trees are to be planted, less sunlight would seep through the leaves, leaving the producers to gain the abiotic factors to do with sunlight, temperature, and water
I hope this helps!!
have a wonderful day!
-millie :D
What points has the same angle as theta?
Answer:
A and C
Explanation:
The easiest way to solve this is by drawing a new triangle, one where one leg is clearly longer than the other. This way, it is easy to see which angles match.
Or, using geometry, we can show that C = θ since they are alternate interior angles. Since C is complementary to the angle between the rays, and A is also complementary to the angle between the rays, then A = C, so A = θ.
For 0 ≤ t ≤ 8 , a particle moving in the xy-plane has position vector 〈x(t),y(t)〉=〈sin(2t),t^2−t〉 , where x(t) and y(t) are measured in meters and t is measured in seconds. At time t = 8 seconds, the particle begins moving in a straight line. For t ≥ 8 , the particle travels with the same velocity vector that it had at time t = 8 seconds. Find the position of the particle at time t = 10 seconds
The position of the particle at t = 10 seconds is approximately 〈1.491, 30〉 meters after all velocity and acceleration calculations.
There is a particle moving in the xy-plane, whose position can be represented as 〈x(t),y(t)〉=〈sin(2t),t^2−t〉 for 0 ≤ t ≤ 8 seconds. We can find its velocity and acceleration vectors using this position vector.
At t = 8 seconds, the particle starts moving in a straight line with the same velocity vector as it had at that time. Therefore, for t ≥ 8 seconds, we can find the position vector of the particle.
To find the position of the particle at t = 10 seconds, we need to substitute t = 10 in the equation of position vector for t ≥ 8 seconds. The position of the particle at t = 10 seconds is approximately 〈1.491, 30〉 meters.
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Which of the following situations will not generate stress?
a.
Driving in traffic
b.
Sleeping
c.
Opening a birthday present
d.
Watching a soap opera
Answer:
Sleeping
Explanation:
Driving in traffic is stressful because you may be late for wherever you are going,
Opening a birthday present is stressful because you don't know what is inside until you open it.
Watching a soap opera is stressful because you do not know what will happen next,
Sleeping is not stressful as long as you don't bring stressful topics to bed.
What was the initial speed of a car if its speed is 40 m/s after 5 seconds of accelerating at -4 m/s²?
A. 50 m/s
B. 60 m/s
C. 25 m/s
D. 20 m/s
Answer:
\(\huge\boxed{\sf V_i=60 \ m/s}\)
Explanation:
Given Data:Final speed = \(V_f\) = 40 m/s
Time = t = 5 s
Acceleration = a = -4 m/s²
Required:Initial velocity = \(V_i\) = ?
Formula:\(\displaystyle a = \frac{V_f-V_i}{t}\)
Solution:Put the givens in the above formula
\(\displaystyle -4=\frac{40 - V_i}{5} \\\\Multiply \ -5 \ to \ both \ sides\\\\-4 \times 5 = 40 - V_i\\\\-20 =40-V_i\\\\Subtract \ 40 \ to \ both \ sides\\\\-20-40=-V_i\\\\-60\ m/s=-V_i\\\\60 \ m/s = V_i\\\\V_i=60 \ m/s\\\\\rule[225]{225}{2}\)
A lamp uses a standard 9 V battery, How much resistance is in the circuit is in the current of 1.05 A?
Answer:
R= v/I
R= 9/1.05=8.5714 ohms
which blu-ray standard defines rewritable disks?
The blu-ray standard that defines rewritable disks is BD-RE which stands for Blu-ray Disc Recordable.
What is BD-RE?
BD-RE stands for Blu-ray Disc Recordable and it refers to two direct to disc optical disc recording technologies that can be recorded on to a Blu-ray-based optical disc with an optical disc recorder.
Thus, the blu-ray standard that defines rewritable disks is BD-RE which stands for Blu-ray Disc Recordable.
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"On a good day, it takes Mr. Hess 23 minutes (1380 seconds) to drive the 12 miles (19,300 meters). What is his average velocity on the way to school?"
I uh, don't understand this at all. If someone could help me solve this, I'd greatly appreciate it!
Answer:
his average velocity is
\(v = \frac{19300}{1380} = 13.9855(m \div s)\)
1. What type of VOM reading requires the meter to be placed in series with the circuit?
A. Resistance
B. Voltage
C. Current
O
D. Power
Answer:
C. Current.
Explanation:
In a series circuit the current is equal in all of its components, so to measure the current we put the meter in series with the circuit.
It's much easier to carry a weight in your hand when your arm is at your side than it is when your arm is pointing straight out in front of you. Use the concept of torque to explain this effect. When you arm is at your side.
when your arm is at your side, the torque exerted by the weight is smaller compared to when your arm is pointing straight out in front of you.
when your arm extends straight out in front of you, the distance between the shoulder joint and hand expands. As a result, the lever arm increases, as does the weight's torque. When the force's line of action is perpendicular to the lever arm, the torque is greatest.
The torque (τ) is calculated as:
τ = force × distance × sin(θ),
where,
Force is the magnitude of the force applied,
Distance is the perpendicular distance from the axis of rotation to the line of action of the force,
θ is the angle between the force and the lever arm.
Your shoulder joint and your hand are farther apart when your arm is extended straight out in front of you. As a result, the lever arm grows, as does the torque produced by the weight. When the force's line of action is perpendicular to the lever arm, As there is the sin angle so the torque is at its greatest.
Therefore, when your arm is at your side, the torque exerted by the weight is smaller compared to when your arm is pointing straight out in front of you. This makes it convenient to carry the weight because a smaller torque requires minimum effort.
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FILL THE BLANK. the ________________ cortex receives most of its input from the thalamic relay nuclei of a given sensory system.
The term you're looking for is "primary sensory cortex." The primary sensory cortex receives most of its input from the thalamic relay nuclei of a given sensory system.
The primary sensory cortex, often referred to as the primary somatosensory cortex or primary visual/auditory cortex, is a portion of the brain that collects and interprets sensory data from numerous body regions. For somatosensory processing, it is situated in the parietal lobe, for visual processing in the occipital lobe, and for auditory processing in the temporal lobe. The perception and interpretation of sensory stimuli like touch, pressure, pain, visual input, and aural signals are fundamentally influenced by the primary sensory cortex. It is in charge of encoding and organising sensory data, which enables us to experience and comprehend the outside world.
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You drop a ball off the roof. It takes 2.5s for the ball to hit the bottom. How fast is it going when it hits the ground?
Answer:
1.5 thats how long it is
Explanation:
good luck
What happens to the particles of an object when its temperature increases? *
The PE of the particles decreases.
The KE of the particles decreases.
The PE of the particles increases.
The KE of the particles increases.
Answer:KE
Explanation: