The maximum kinetic energy of the photoelectron K0 when light with a wavelength of 310 nm falls on the same surface is 2.135 eV.
You need to find a working function to solve this problem. Quantum Theory Regarding the Photoelectric Effect of the work function (eV), the work function describes the minimum energy required for electrons to continue to stick to the metal.
Planck's constant is also 4.14 x 10⁻¹⁵ eV.
Max KE = 1.10 eV
lambda = 400 nm = 400 x 10⁻⁹ m
First, find the frequency.
f = c ÷ λ
f = (3 x 10⁸) ÷ (400 x 10⁻⁹ m)
f = 7.5 x 10¹⁴
Max KE = hf - work function
1.10 eV = (4.14 x 10⁻¹⁵eV) (7.5 x 10¹⁴) - function
work function = 2.005 eV
Now find the frequency for the second wavelength.
f = c /λ
f = (3 x 10⁸) ÷ (300 x 10⁻⁹)
f = 1 x 10¹⁵
Now plug this into your equation with the frequency and work function you found in the previous problem.
KEmax = hf - work function
KEmax = (4.14 x 10⁻¹⁵ eV)(1 x 10¹⁵) - 2.005 eV
KEmax = 2.135 eV
So, the maximum kinetic energy is 2.005 eV
The complete answer:
When ultraviolet light with a wavelength of 400 nm falls on a certain metal surface, the maximum kinetic energy of the emitted photoelectrons is 1.10 eV. What is the maximum kinetic energy K0 of the photoelectrons when the light of wavelength 310 nm falls on the same surface? Use h = 6.63×10−34 J⋅s for Planck's constant and c = 3.00×108 m/s for the speed of light and express your answer in electron volts.
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When a plant or animal is no longer found anywhere on Earth, it is described as
being
locally extinct
geographically extinct
biologically threatened
biologically extinct
Answer:
B. Geographically extinct
Explanation:
Lets take a moment to look at the words provided. Geographical means physical features of an area, or relating to geography. It can also relate to when we are talking about information on the Earth's surface. Extinct means that the organism is no longer alive, and that there are none left of its species. So, putting the two words together, geographically extinct means that the organism is no longer found on Earth.
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Panna
What is the Plate Tectonics Theory?
Answer:
The plate tectonics theory is that there are PLATES covering the earth's surface. This theory also says that they may cause earthquakes and cause volcanos to form!
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What's the role that oysters play in keeping the ratio of floating algae to sea floor algae levels of the bay healthy
Answer:
Oysters were keeping the nutrient levels relatively stable in the bay by filtering the nutrient sewage, animal waste, and fertilizer that was running into the bay.
Explanation:
How does Genetic Variation relate to Selection?
Genetic variation is a measure of the genetic differences that exist within a population. Genetic variation is essential for natural selection because natural selection can only increase or decrease frequency of alleles that already exist in the population. Genetic variation is caused by: mutation.
Answer: Genetic variation is important to the processes of natural selection and biological evolution. The genetic variations that arise in a population happen by chance, but the process of natural selection does not. Natural selection is the result of the interactions between genetic variations in a population and the environment.
The majority of the atmosphere ozone has lies between the altitude of 20,000 m and 50,000 m based on this information what effect does ozone appear to have on the amount of heat that is absorbed in the atmosphere 
Answer:
Because temperatures increase within this altitude range, regions high in ozone absorb heat better than regions low in ozone.
Explanation:
Exact answer from Plato. Let's graduate together lol ; )
The impact ozone appear to have on the amount of heat should be that it increased the temperature.
Impact on ozone appear to have on the amount of heat:Since the majority of the atmosphere ozone has lies between the altitude of 20,000 m and 50,000 so here the temperature is increased so it should be within the altitude range.
The region that should be high in ozone is absorbed heat that better than regions that low in ozone.
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Answer:
The leaf represent the primary organ of photosynthesis
Answer:
True
Explanation:
Why do we need sleep? (scientific answer pls)
Answer:
Sleep is an essential function that allows your body and mind to recharge, leaving you refreshed and alert when you wake up.
the frequency of a wave in a stretched string depends on the length L, tension T and linear density m with dimension ML-1 . deduce the formula for f in terms of L , T and M using dimensional analysis
Answer:
[tex]f = \frac{1 }{L}\sqrt{\frac{T}{m} }[/tex]
Explanation:
Let the frequency ,
[tex]f = L^{x}T^{y}m^{z}[/tex]
Now the unit of frequency is hertz = s⁻¹ = T⁻¹ where T is time, tension T = kgm/s² = MLT⁻¹ and linear density m = kg/m = ML⁻¹.
So,
[tex]T^{-1} = L^{x}[MLT^{-2} ]^{y}[ML^{-1} ]^{z}\\[/tex]
collecting the like bases, we have
[tex]T^{-1} = [L^{x + y -z}][M^{y + z} ][T^{-2y} ] \\L^{0} M^{0} T^{-1} = [L^{x + y -z}][M^{y + z} ][T^{-2y} ][/tex]
Equating powers on both sides, we have
x + y - z = 0 (1)
y + z = 0 (2)
-2y = -1 (3)
From (3), y = 1/2
From (2), z = -y = -1/2
Substituting y and z into (1), we have
x + y - z = 0
x + 1/2 - (-1/2) = 0
x + 1/2 + 1/2 = 0
x + 1 = 0
x = -1
So,
[tex]f = L^{x}T^{y}m^{z}\\f = L^{-1}T^{\frac{1}{2} }m^{\frac{-1}{2} }[/tex]
[tex]f = \frac{1 }{L}\sqrt{\frac{T}{m} }[/tex]
Describe all the tissues and cell types that are found in a leaf and describe how these individual parts work together to accomplish processes of photosynthesis.
Explanation:
While individual plant species are unique, all share a common structure: a plant body consisting of stems, roots, and leaves. They all transport water, minerals, and sugars produced through photosynthesis through the plant body in a similar manner. All plant species also respond to environmental factors, such as light, gravity, competition, temperature, and predation.
Which of the 8 characteristics prove that a virus is or is not considered living?
Answer:
Nonliving characteristics include the fact that they are not cells, have no cytoplasm or cellular organelles, and carry out no metabolism on their own and therefore must replicate using the host cell's metabolic machinery.
Explanation:
Viruses lack membranes. Hence, they do not show characteristics of life until they enter a living cell. On entering the living cell they use the cell machinery to multiply.
1.Truong made a pitcher of lemonade for a picnic. Which action shows that lemonade is a liquid and not a solid or a gas?A.Thawing itB.Filling a spiral straw halfway with itC.Heating it up in the sunlightD.Squeezing lemons to make it.
Answer:
either c or d
Explanation:
How does the size of the soil particles impact
the soil's permeability (movement of water)?
Answer:
Water moves by gravity into the open pore spaces in the soil, and the size of the soil particles and their spacing determines how much water can flow in. Wide pore spacing at the soil surface increases the rate of water infiltration, so coarse soils have a higher infiltration rate than fine soils.
How does soil particle size affect permeability?
But permeability is a different thing. It increases as particle size increases. By definition, permeability is a MEASURE OF EASE with which fluids will flow though a porous rock, soil or sediment. ... That means capillarity increase as particle sizes decreases.
How do trees and forests evolve over time?
Answer:
The particular changes that take place are influenced by the amount of light, nutrients, and water available to the plants. The gradual change in species composition and replacement of some forest species with others over time or after a disturbance is called succession.
Explanation:
Answer:
The particular changes that take place are influenced by the amount of light, nutrients, and water available to the plants. The gradual change in species composition and replacement of some forest species with others over time or after a disturbance is called succession.
Explanation:
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(brainliest please, if possible)
how does acid rain affect an ecosystem?
Answer:
The ecological effects of acid rain are most clearly seen in aquatic environments, such as streams, lakes, and marshes where it can be harmful to fish and other wildlife. As it flows through the soil, acidic rain water can leach aluminum from soil clay particles and then flow into streams and lakes
Explanation:
Hope this helped <3
what organelle ships proteins where they are need?
Answer:
The endoplasmic reticulum (ER) is involved in the synthesis of lipids and synthesis and transport of proteins.
The Golgi apparatus modifies, sorts, and packages different substances for secretion out of the cell, or for use within the cell.
Vesicles are also used as chemical reaction chambers.
Explanation:
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Ribosomes assemble proteins from___?
DNA
amino acids
mitochondria
cytoplasm
Answer:
Amino acids.
Explanation:
I'd like some answers if possible
Atoms are made up of even smaller particles called Molecules
Answer:
Atoms are made up of even small atoms called electrons ,protons ,neutrons
the electrons are the green circles
the protons are the blue circles
the neutrons is the yellow circles ♌
What is the purpose of cellular respiration. In a short sentence
Answer:
Produce energy (in the form of ATP) for metabolic processes and muscle contraction.
Explanation:
The beginning of modern taxonomy occurred during the:
1500's
Greek civilization
1700's
1800's
Answer:
1700s
Explanation:
Image result for The beginning of modern taxonomy occurred during the:
Modern taxonomy officially began in 1758 with Systema Naturae, the classic work by Carolus Linnaeus
If this helped
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why cant you touch your palm to your shoulder? (on the same arm)
Answer: cause
Explanation:
Some people can some cant
On which side of the mountain would you be most likely to find a forest?
Answer:
Mountain lands provide a scattered but diverse array of habitats in which a large range of plants and animals can be found. At higher altitudes harsh environmental conditions generally prevail, and a treeless alpine vegetation, upon which the present account is focused, is supported. Lower slopes commonly are covered by montane forests. At even lower levels mountain lands grade into other types of landform and vegetation—e.g., tropical or temperate forest, savanna, scrubland, desert, or tundra.
The largest and highest area of mountain lands occurs in the Himalaya-Tibet region; the longest nearly continuous mountain range is that along the west coast of the Americas from Alaska in the north to Chile in the south. Other particularly significant areas of mountain lands include those in Europe (Alps, Pyrenees), Asia (Caucasus, Urals), New Guinea, New Zealand, and East Africa. The worldwide distribution of mountain lands is shown in Figure 1.
Figure 1: Worldwide distribution of mountain lands.
Explanation:
Explain how potential energy and kinetic energy change as a roller coaster around the track
Answer:
beacuse of the ups and downs
Explanation:
Answer:
up, down
Explanation:
thinks mrs. Clack that finned tetrapods developed "hands" before or after migrating to land
Answer:
what am i supposed to anwser? should I prove her wrong?
Explanation:
state birth control methods according to Islam view
help me
Answer:
There is no single attitude to contraception within Islam; however eight of the nine classic schools of Islamic law permit it. But more conservative Islamic leaders have openly campaigned against the use of condoms or other birth control methods, thus making population planning in many countries ineffective.
Which statement explains the movement of energy through aerobic
cellular respiration? Choose the correct answer.
O Heat energy is absorbed as chemical potential energy is transferred from
oxygen molecules to ATP molecules.
O Heat energy is released as chemical potential energy is transferred from
oxygen molecules to ATP molecules.
O Heat energy is released as chemical potential energy is transferred from
glucose molecules to ATP molecules.
Answer:
Energy in the form of heat is released as chemical potential energy is transferred from glucose molecules to ATP molecules
The statement that best explains the movement of energy through aerobic cellular respiration is as follows:
Heat energy is released as chemical potential energy is transferred from glucose molecules to ATP molecules.Thus, the correct option for this question is C.
What is Aerobic cellular respiration?Aerobic cellular respiration may be defined as a type of biological process through which the molecules of glucose are broken down into carbon dioxide and water in the presence of oxygen with the liberation of some amount of energy. The derivation of energy is the fundamental mechanism of this process.
The mechanism initiate after capturing the heat energy from the and transforming it into chemical energy through the process of photosynthesis which synthesizes glucose. This glucose is then transferred to its potential energy to the ATP molecules in the presence of oxygen.
Therefore, heat energy is released as chemical potential energy is transferred from glucose molecules to ATP molecules. Thus, the correct option for this question is C.
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state birth control methods according to Islam view?
help please
Explanation:
There is no single attitude to contraception within Islam; however eight of the nine classic schools of Islamic law permit it. But more conservative Islamic leaders have openly campaigned against the use of condoms or other birth control methods, thus making population planning in many countries ineffective.
How are ions such as phosphate absorbed by plant roots?
Drag the tiles to the correct boxes to complete the pairs.
Match the mRNA sequences to their DNA sequences.
2. What are the two main forms of energy? Describe them.
Answer:
Kinetic energy and Potential energy
Explanation:
Thank you
is An enzyme is composed of amino acids.
Answer:
no..
enzymes are simple proteins which just speed up the process of digestion and specific enzymes break down proteins to amino acids
:)