Answer:
The number of photoelectrons are increased
Explanation:
According to Albert Einstein, when light falls on a clean metal surface, electrons are ejected from the clean metal surface. This is known as photo electric effect.
The kinetic energy of the emitted photoelectron depends on the energy of the incident photon and the work function of the metal. If the energy of the incident photon is less than the work function of the metal, photoelectric effect does not occur.
Below a given threshold frequency or wavelength called the threshold frequency or threshold wavelength photoelectric effect does not occur.
However, doubling the photon flux of light doubles the intensity of the light. This only leads to increase in the number of photons and have nothing to do with the energy of the emitted photoelectrons.
What does each column (down) have in common?
Answer:
elements in each group have the same number of electrons in the outer orbital. Those outer electrons are also called valence electrons.
Every element in the second column (group two) has two electrons in the outer shell.
Covalent bonds normally form between which two types of elements?
Answer: Covalent bonds usually occur between nonmetals. In Covalent bond elements share their electrons.
Endocrine disruptors are commonly found in
a. pesticides
b. plastics and consumer products
c industrial by-products
d. all of the above
help pls!!!!
Answer:
d
Explanation:
edge2020
Endocrine disruptors are commonly found in pesticides, plastics, and consumer products, and industrial by-products. Thus, the correct option for this question is D, i.e. all of the above.
What do you mean by Endocrine disruptors?Endocrine disruptors may be defined as a type of extrinsic substance or mixture that significantly changes the function of the endocrine system and subsequently stimulates adverse health effects in an intact organism, its offspring, or populations.
According to the context of this question, pesticides like DDT, Atrazine, etc. plastics, and food storage materials like bisphenol A (BPA), Phthalates, Phenol, etc., and industrial by-products Polychlorinated biphenyls (PCBs) and Dioxins causes the significant and effective disruptions of the endocrine system.
Endocrine disruptors are found in numerous everyday products, including plastic bottles and containers, liners of metal food cans, detergents, flame reductions, food, and pesticides.
Therefore, endocrine disruptors are commonly found in pesticides, plastics, and consumer products, and industrial by-products. Thus, the correct option for this question is D, i.e. all of the above.
To learn more about Endocrine disruptors, refer to the link:
https://brainly.com/question/15832364
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How many moles of hydrochloric acid does
1.505x10^24 atoms of hydrochloric acid make?
2.499 mol HCl
hope this helps
How many protons are present in one iron(III)
ion?
Answer:
26 protons
A neutral iron atom has 26 protons and 26 electrons. In order to form a 3+ ion, it must lose three electrons. The Fe atom loses two 4s electrons and one 3d electron.
Explanation:
HELP ASAP I NEED HELP FAST PLEASE
Kinetic energy is often referred to the energy of
Question 1 options:
A)work
B)mass
C)motion
D)force
)
Question 2 (1 point)
Saving...
Which example has the least kinetic energy
Question 2 options:
A)a 10 kg rock rolling down a hillside at 100 m/s.
B)a 100 kg rock rolling down a hillside at 100 m/s.
C)a 1 kg rock rolling down a hillside at 1 m/s.
D)a 100 kg rock rolling down a hillside at 1 m/s.
Question 3 (1 point)
Saved
The law of conservation of energy states that
Question 3 options:
energy can be created but not destroyed.
energy can neither be created nor destroyed, only change forms.
energy can be destroyed but not created.
Question 3 (1 point)
Saved
The law of conservation of energy states that
Question 3 options:
A energy can be created but not destroyed.
B energy can neither be created nor destroyed, only change forms.
C energy can be destroyed but not created.
D energy never changes
Which is an example of an object increasing its kinetic energy
Question 4 options:
A a train stopped at the station.
B an airplane after landing on a level runway.
C a mouse running faster after spotting a cat.
D a rocket before launch.
Question 5 (1 point)
Identify when an object has a kinetic energy of zero joules.
Question 5 options:
A when an object is no longer in motion.
B when the energy has been destroyed.
C just after a ball it leaves your hand pitching a ball.
D as a pendulum swings downward.
Which is NOT an example of kinetic energy
Question 6 options:
A an elevator moving up to the 3rd floor.
B a skateboard rolling down a hill.
C an arrow after it has hit the target and is at rest.
D a skydiver as they decrease speed after opening their parachute.
Answer:
kinetic energy is referred to as the energy of motion (particles are always moving). so the answer is c).
Write the balanced molecular equation for the acid-base reaction that occurs when aqueous solutions of hydrochloric acid (HCl) and sodium hydroxide (NaOH) are mixed.
Answer:
NaOH(aq) + HCl(aq) → NaCl(aq) + H₂O(l)
Explanation:
Sodium hydroxide (NaOH) is a strong base and hydrochloric acid (HCl) is a strong acid. That means that they are totally dissociated into ions in aqueous solution.
When a solution of NaOH is mixed with a solution of HCl, a neutralization reaction occurs, in which a salt (NaCl) and water (H₂O) are formed.
The balanced molecular equation for this reaction is:
NaOH(aq) + HCl(aq) → NaCl(aq) + H₂O(l)
what is the formula for Li1+ and F -1, and the IUPAC name for it too?
Answer:
stupid
13
Explanation:
which of the following types of stars would be hottest in temperature A main sequence B whitedwarf C red giant D Red supergiant star
Answer:
it's either b or d
Explanation:
100 points?
1. Diamonds, coal, and pencil lead are all made of the same element. What is that element?
2. What is the chemical symbol for this element?
3. Is this element primarily found in the solid earth, Earth’s living matter, Earth’s oceans, or the atmosphere?
4. Since the same elements make up coal and diamonds, what causes them to appear different?
5. Under normal conditions, what color do we expect diamonds to be?
6. Why can diamonds different colors?
Answer:
1. Carbon
2. C
3. Oceans
4. This is the hardest question so far :(
5. Most of every diamonds are colorless and clear, but are in a category of brown or pale yellow color that is called the normal color range.
6. has to be refraction.
Pls mark me brainly!
____ are atoms or molecules with an electrical
charge, either positive or negative. Whether a liquid is
an acid or a base depends on these. We classify acids
and base on the ____. A liquid on this scale with
a pH of 3 is a/an ____, while a liquid with a pH of
9 is a/an ____ When an acid and a base interact
with one another the liquid can become ___
and it will have a pH of 7.
The answer to fill in the blank are: Acidic, Basic, pH Scale, Neutral, Ion
Answer:
ions
ph scale
neutral
basic
acidic
Explanation:
hopefully I got it right u welcome :)
Which orbital notation represents an atom of beryllium in
the ground state?
Answer: Beryllium is the fourth element with a total of 4 electrons. In writing the electron configuration for beryllium the first two electrons will go in the 1s orbital. Since 1s can only hold two electrons the remaining 2 electrons for Be go in the 2s orbital. Therefore the Be electron configuration will be 1s22s2.
Explanation:
Orbital notation represents an atom of beryllium in the ground state is [tex]1s^22s^2[/tex].
Beryllium atom:Beryllium is the fourth element with a total of 4 electrons. Beryllium atoms have 4 electrons and the shell structure is 2.2. The ground state electron configuration of ground state gaseous neutral beryllium is [tex][He] 2s^2[/tex]. The ground state of an electron, the energy level it normally occupies, is the state of lowest energy for that electron. Beyond that energy, the electron is no longer bound to the nucleus of the atom and it is considered to be ionized. Electron configuration for beryllium the first two electrons will go in the 1s orbital. Since 1s can only hold two electrons the remaining 2 electrons for Be go in the 2s orbital.
Therefore, the Be electron configuration will be [tex]1s^22s^2[/tex].
Find more information about Beryllium atom here:
brainly.com/question/5041761
What is the acceleration of a shopping cart that is 16 kg moving with a force of 2N?
30 points!!!!!!!!!!!!!!!
Answer:
According to Newton's second law of motion, the acceleration of an object equals the net force acting on it divided by its mass, or a = F m . This equation for acceleration can be used to calculate the acceleration of an object when its mass and the net force acting on it are known.
Explanation:
hope it help
Answer:
According to Newton's second law of motion, the acceleration of an object equals the net force acting on it divided by its mass, or a = F m . This equation for acceleration can be used to calculate the acceleration of an object when its mass and the net force acting on it are known
Explanation:
What do ionic bonds form between?
Answer:
Ionic bonds form between cations and anions.
Explanation:
Electrovalent bonds (ionic bonds) form due to the electrostatic attraction between the two oppositely charged ions in the compound. A cation is formed when a metal ion loses a valence electron. Anions are formed the opposite way: a non-metal ion gains a valence electron.
A balloon contains 0.950 mol of nitrogen gas and has a volume of 25.5 L. How many grams of N2 should be released from the balloon to bring the volume to 17.3 L?
What is force? Why?
Which describes reproducibility
Arsenic has one stable isotope:75/33 As.
How many neutrons and protons are in a stable arsenic atom?
A. 33 neutrons and 42 protons B. 33 neutrons and 75 protons
C. 42 neutrons and 33 protons
D. 75 neutrons and 33 protons
a push or a pull between an object (many types)
Your answer
Answer:
your answer would be force
Explanation:
Which statement about the earth’s atmosphere is true?
A recent decrease in carbon dioxide levels will increase plant growth on Earth.
In the past few decades, carbon dioxide levels have been rising.
In the past few decades, carbon dioxide levels have been falling.
A recent increase in carbon dioxide levels can contribute to a long-term cooling of Earth’s climate.
Answer: B - In the past few decades, Carbon dioxide levels has been rising because Rising levels of Carbon dioxide has become an immediate concern for the Environmentalists. This is because carbon dioxide is a greenhouse gas and risen levels of greenhouse gases can lead to unusual warming up of the Earth's Atmosphere.
Quote: I HOPE THAT HELPED!
Answer:
I guess it's ***B***
Explanation: :) Your welcome!
Which of the following compounds has a lower boiling point?
Li2O
H₂O
KCI
MgCl2
A real gas behaves most like an ideal gas at?
Is a compound a substance made up of only 1 kind of element
Answer/Explanation:
No compounds must be made up of two or more elements. otherwise it wouldn't be a compound. There must be some type of combination or it isn't a compound.
PLS HELP ILL MAKE BRAINLIEST 30 POINTS!!
Which parts of the muscular and skeletal system work together to move muscles and bones? nerves esophagus and intestine arteries and vessels tendons and ligaments
Answer:
tendons and ligaments
If you have 0.95 moles of FeCl3, how many moles of MgCl2 do you produce in the reaction
FeCl3 + Mg --> MgCl2 + Fe?
Please help!!
If yttrium loses three electrons to be similar to Krypton (to try and become Royal), what type of ion does it become.
Answer:
.
Explanation:
Did u get ur answer dear?
Which statements correctly describe chemical reactions? Select all that apply.
Answer:
The statements that correctly describe chemical reactions are
A. If the reactants include 5 atoms of Fe, then the products must include 5 atoms of Fe.
C. If the reactants include an aluminum atom, then the products must include an aluminum atom.
E. If there are a total of 15 atoms in the reactants, there must be a total of 15 atoms in the product.
Explanation:
In a chemical reaction, reactants are the elements or compounds that react to give a particular product(s). The reactants are the substances that start the chemical reaction and they are found at the left hand side of the chemical equation. While the products are found at the right hand side of the chemical equation and they are seen at the end of the reaction.
In chemical reaction, the number of atoms that starts the reaction remains the same. That is the same number of atoms is seen in the products. This follows the law of conservation of matter - which postulates that matter cannot be created or destroyed.
But in a chemical reaction, number of molecules are not conserved.
The statements that correctly describe chemical reactions are:
A. If the reactants include 5 atoms of Fe, then the products must include 5 atoms of Fe.
C. If the reactants include an aluminum atom, then the products must include an aluminum atom.
E. If there are a total of 15 atoms in the reactants, there must be a total of 15 atoms in the product.
Chemical Reaction:A chemical reaction is a process in which one or more substances, also called reactants, are converted to one or more different substances, known as products. If a physical change occurs, the physical properties of a substance will change, but its chemical identity will remain the same.
Thus, the statements that are true for a chemical reactions are A, C and E.
Find more information about Chemical reaction here: brainly.com/question/26018275
A truck traveled at a constant speed for 6 hours. Then, it
decreased its speed by 13 mph for the remaining 228 miles. If
the total distance was 876 miles, how long did it take to travel
the remaining 228 miles?
h
Answer:
2.4 hrs
Explanation:
The constant speed of the truck for 6 hrs can be calculated by: speed=distance/time. Speed =(876-228)/6=648/6=108m/s. So the decreased speed = (108-13)=95m/h. Now, speed =distance /time We get 95m/h = 228/t. t=228/95 hrs = 2.4 hrs PLEASE MARK ME THE BRAINLIEST!!
Answer:
17.5 h
Explanation:
228/13=17.5384615385
17.5
I hope this helped! :)
Can an object of 8.6g/cm3 Float
Answer:
yes
Explanation:
How does a changing environment affect plant and animals threat live there
Explanation:
Changing the environment takes away habitats from animals and some nutrients plants need
Hope this helps :>