Answer:
verical rays
Explanation:
The rays result in shorter days are the vertical rays.
What are vertical rays ?Vertical rays are another name for direct rays. Rays that are straight overhead are referred to as vertical. Because the Earth is spherical, not all the Sun's rays hit it directly or vertically.
Vertical rays lose less heat because they cover a shorter distance. Slanted rays cover more ground and dissipate more heat. Sun's vertical rays fall between the Tropics of Cancer and Capricorn, along its migratory belt.
The length of a day is determined by the Earth's rotation around its axis, which has been accelerating during the past several decades. Our days have been becoming shorter due to this tendency.
Thus, vertical rays are responsible for shorter days.
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What mass of silver can be plated onto an object in 33. 5 minutes at 8. 70 A of current? Ag (aq) e- → Ag(s).
Answer:
need points sorry
Explanation:
There are no transition elements between the Group 2 element magnesium and the
Group 3 element aluminium.
Give a reason why, in terms of electronic structure.
Answer:
Atomic orbital energy ordering.
Explanation:
The transition metals constitute the d-block. The answer to your question has to do with the energy ordering of atomic orbitals. Specifically, the 3s orbitals are lower in energy than 3p, which are lower in energy than 4s, which are lower in energy than 3d (remember the principal quantum number for d orbitals is one minus the principle quantum number of the shell so n = 4 level's d orbitals are the 3d orbitals). According to the Aufbau principle, atomic orbitals are filled with electrons from the lowest energy up. So the orbitals would have to be filled in the order of 3s, 3p, 4s, and then 3d. Magnesium has its last valence electron residing in the 3s orbital and Aluminum has its last valence electron residing in the first 3p orbital (specifically the 3px orbital, which is aligned horizontally in the 3d plane. The three p orbitals for all principle quantum levels are px, py, pz, with the x, y, z describing the orientation in the 3d plane). The 3d has not yet been reached in terms of energy ordering. This is why there are no transition elements between magnesium and aluminum, in terms of electronic structure.
If two trucks are moving at the same speed, but truck A has a mass of 3,000 kg, and truck B has a mass of 4,500 kg, what statement is true?
Question 3 options:
Truck B will have a greater stopping distance.
Truck A will have a greater stopping distance.
Truck B has less kinetic energy.
Truck A has greater kinetic energy.
We want to compare the kinetic energy of two moving objects, we will see that the correct option is the first one:
"Truck B will have a greater stopping distance."
Remember that the kinetic energy of an object of mass M and velocity V is given by:
[tex]E = \frac{M}{2}*V^2[/tex]
Here we know that truck A and truck B have the same velocity, but truck B has a larger mass.
Knowing that the kinetic energy increases linearly with the mass, we can conclude that truck B has the largest kinetic energy.
Because of this, we can also conclude that truck B will have a greater stopping distance, this happens because there is more kinetic energy that must be dissipated.
So the correct option is the first one:
"Truck B will have a greater stopping distance."
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The minimum collision energy between two molecules in order for them to react is called A activation energy. B dispersal energy C spontaneous energy D transition energy.
A: activation energy
hope i helped :D
How does One determine number of electron domains in molecul or ion
Answer:
The number of electron domains in a molecule or ion is the number of bonds (double and triple bonds count as one domain) plus the number of nonbonding (lone) electron pairs.
Explanation:
Fe(s) + CuSO4(aq) —> FeSO4(aq) + Cu(s)
This chemical equation represents a __ reaction.
A. synthesis
B. decomposition
C. neutralization
D. single replacement
Answer:
D
Explanation:
single replacement....iron combined with tetraoxosulphate (VI)
rutherford and JJ thompson both contributed to what we know about the structure of the atom. What experiments did they perform and how did it change what we know about the structure of the atom? Furthermore describe the structure of an atom using only two words
Answer:
J.J. Thomson's experiments with cathode-ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus. I would describe the structure of an atom as the plum pudding model.
Which type of electromagnetic radiation had a lower frequency than infrared radiation
Answer:
Radio waves
Explanation:
Radio waves, on the other hand, have the lowest energies, longest wavelengths, and lowest frequencies of any type of EM radiation. In order from highest to lowest energy, the sections of the EM spectrum are named: gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, and radio waves.
Ammonium nitrate criss cross formula
Answer:
By using the criss cross method,the -1 charge of nitrate ion is shifted to ammonium ion and +1 charge of ammonium ion is shifted to nitrate ion. In this way, the final formula NH4NO3 is formed for the ammonium nitrate.
Step 2: Predict the Number of Nuclei at Each Half-Life
0.5"
Using the values from Step 1, predict the pattern
for the decay of 100 atoms over the course of eight
half-life cycles, Round to the nearest whole
number of atoms. Record in the appropriate
blanks
Time- Half-
Life Cycles, no
Initial
Radioactive Atoms
(Predicted)
100
1
1
0.5
А
2
0.25
A= 27
25
3
0.125
B
B = 16
4.
0.0625
6
C = 9
5
0.03125
С
D=4
6
0.015625
D
7
0.0078125
1
E
8
0.00390625
E
DONE
) Intro
Answer:
A=50
B=13
C=3
D=2
E=0
Explanation:
Why does sugar taste sweet
PLEASE EXPLAIN
Answer:
Because i comes from cane.
I NEED HELP
so is for example
FeO + H2O ---> Fe(OH)2
And
Fe + 2H20 ---> Fe(OH)2 + H2
The same? Same thing for other metals
Answer:
no
Explanation:
because when is iron oxide + water given you iron hydroxide while the other one is Iron plus 2 moles of water giving you iron hydroxide and hydrogen
Can you use volume alone to predict whether an object will sink or float? Explain your answer
Answer:
Can volume alone be used to predict whether an object will sink or float? -No, you need both mass and volume to find its density to see if it can float.
why do we use acid during the detection of halogens
Answer:
Nitric acid decomposes sodium cyanide and sodium halide. else, they precipitate in test and misguide the result. Therefore, dilute nitric acid is added before testing halogens to expel all the gases if evolved.
Phân tử khối của CO² gấp mấy lần phân tử khối khí H²
Explanation:
DCO2/H2 = 44/2 = 22............................
A student graphed the position of a cart during a 7-second time interval.
Which statement best describes the cart?
A.
The cart was stationary except for a short burst of acceleration of 0.5 m/s².
B.
The cart accelerated at a constant rate of approximately 0.8 m/s².
C.
The cart was stationary with a velocity of 0 m/s for the entire 7 seconds.
D.
The cart moved at a constant velocity of 0.5 m/s for the entire 7 seconds.
The cart accelerated at a constant rate of approximately 0.8 m/s². Option (B) is correct.
Option B is the best description based on the graphed position data during the 7-second time interval. The cart's acceleration can be determined by analyzing the shape of the position-time graph.
If the cart was stationary, the position-time graph would be a horizontal line (option C). If the cart moved at a constant velocity, the graph would be a straight line inclined at a constant angle (option D).
However, the graph likely shows a curved line, indicating changing position over time. This suggests that the cart experienced acceleration. To further confirm, calculate the acceleration:
Acceleration (a) = Δv / Δt,
where Δv is the change in velocity and Δt is the change in time.
Given the time interval is 7 seconds, and the initial and final velocities are likely different, you can calculate the average acceleration. If the average acceleration is approximately 0.8 m/s², then option B is correct.
The graphed data aligns with the scenario of constant acceleration, supporting option B.
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for our sample energy scoring sheet, how do we calculate the energy of roasting?
multiply your temp change by 12
hope this helps!
What happens to the molecules that make up a chocolate chip as it is heated in the oven?
Answer:As thermal energy is transferred to the chocolate, its molecules vibrate faster and faster. Eventually they vibrate fast enough that they start to slide past each other and move around. As this happens, the chocolate changes from a solid to a liquid.
Explanation:
Answer:
it becomes
Explanation:
as a soggy liquid
that is how it becomes
liquid and little thick
as it is heated
hope it helps you
thank you
what are the uses of the periodic table
Answer:
In today's world, the periodic table is very valuable for both students and scientists since it allows them to forecast the sorts of chemical reactions in which a specific element is likely to engage. Rather than memorizing facts and figures for each element, students and scientists can learn a great deal by simply looking at the table. They can learn about an element's reactivity, whether it is likely to conduct electricity, whether it is hard or soft, and many other characteristics by simply looking at the table.
Groups are made up of elements that are in the same column as one another and have attributes that are comparable to one another. If we look at the first column (the alkali metals), for example, we see that they are all metals that have a 1+ charge in reactions, react quickly with water and combine easily with nonmetals.
Periods are made up of elements that are arranged in a row next to one another and have the same maximum unexcited electron energy level as one another.
The periodic table also has the advantage of providing all the information you need to balance chemical processes at a glance, which is a very valuable feature. The atomic number and, in most cases, the atomic weight of each element are included in the table. The group of an element indicates the characteristic charge of that element.
Explanation:
Having studied the data for patterns and trends, you should now be able to draw
some conclusions about how knowing the half-life of the element Lokium would
help you determine the absolute age of rock in which this element is found. In a
paragraph, create an imaginary example of finding a given amount of Lokium and
DOL in a rock, and then determining the absolute age of that rock. Assume that
each trial represents 1,000 years
Answer:
The situation given here is imaginary such that the life of Rock has to be found using the half-life of the element lokium that has been found inside the rock.
Half-life of any material is the amount of time taken by that particular material to decay. Now the amount of lokium found in rock can show after how many half-lives this amount has been left out.
The time elapsed will be log (L) atoms X half-life.
Explanation:
Which surface has the least amount of friction?
An ice rink
A grassy field
A paved road
A sidewalk
Answer:
An ice rink has the least amount of friction.
Any smooth surface has the least amount of friction.I hope this helped at all.
Which surface has the least amount of friction?
An ice rink
A grassy field
A paved road
A sidewalk
Answer:
An Ice rinkThe littoral zone is rich in nutrients
true or false
Answer:
false
Explanation:
Calcule la molaridad de una solución acuosa de ácido sulfúrico (H₂SO₄) que se preparó al mezclar, en un recipiente aforado, 4 moles del ácido con suficiente agua hasta completar 8 litros de solución. *
0.4
0.6
0.3
0.5
Considerando la definición de molaridad, la molaridad de una solución acuosa de ácido sulfúrico (H₂SO₄) es 0.5 [tex]\frac{moles}{litro}[/tex].
La molaridad es una medida de la concentración de un soluto en una disolución que se define como el número de moles de soluto que están disueltos en un determinado volumen.
La molaridad de una solución se calcula dividiendo los moles del soluto por el volumen de la solución:
[tex]Molaridad=\frac{numero de moles de soluto}{volumen}[/tex]
La Molaridad se expresa en las unidades [tex]\frac{moles}{litro}[/tex].
En este caso, sabes que una solución acuosa se preparó al mezclar 4 moles del ácido con suficiente agua hasta completar 8 litros de solución. Entonces, sabes que:
número de moles de soluto= 4 molesvolumen= 8 litrosReemplazando en la definición de molaridad:
[tex]Molaridad=\frac{4 moles}{8 litros}[/tex]
Resolviendo:
Molaridad= 0.5 [tex]\frac{moles}{litro}[/tex]
Finalmente, la molaridad de una solución acuosa de ácido sulfúrico (H₂SO₄) es 0.5 [tex]\frac{moles}{litro}[/tex].
Aprende más:
https://brainly.com/question/17647411?referrer=searchResultshttps://brainly.com/question/21276846?referrer=searchResultsUna pieza cúbica de 34 mm de arista tiene una masa de 310,5 g. Determina su densidad, expresada en kg/m3
Answer:
Explanation:
examples of physical properties.
Answer: Familiar examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity. We can observe some physical properties, such as density and color, without changing the physical state of the matter observed.
Explanation:
48. Categorize each of the elements in problem 47 as a
representative element or a transition metal
Will give brainliest :)
Answer:
The correct answer is a transition metal.
Explanation:
Hope it helps.
Comments:
Hearts and RatesMark me as Brainliest AnswerFollow MeAll the given elements are representative elements as they have valence electrons present in p -orbital except option a which has valence electron d-orbital and hence is not a representative element.
It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.
Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.
The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.
Thus, all the given elements are representative elements as they have valence electrons present in p -orbital except option a which has valence electron d-orbital and hence is not a representative element.
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what is the molecular formula of linoleic acid?
Answer:
C18H32O2
Explanation:
This is it, i hope it helps Good luck.
what is the unique characterization of a ph buffer?
What results when oxygen reaches a burning splint?
Answer:
Hydrogen (H2) When a burning splint is introduced to a sample of pure hydrogen gas, it will burn with a popping sound. Oxygen (O2) When a smoldering splint is introduced to a sample of pure oxygen gas, the splint will reignite.
Answer:
The burning splinter makes hydrogen and oxygen react and you hear a pop sound.
Explanation:
Part B
Emmerson pours the clear water into the side of the vase with the soil and gravel. The series of animated pictures shows how his model looked over time. What do you observe?
Answer:
experiment can show the movement of pollutants through the groundwater!
Explanation:
Answer:
I see that the water is starting to get darker and darker which means it is getting dirtier the higher is goes up. So that means that the soil and gravel will pollute the water with dirt, gravel, etc.
Explanation: Please give brainliest have a good day:)