Answer:
Solid: calcium and potassium
Liquid: mercury and bromine
Gaseous: oxygen and fluorine
Explanation:
Matter exists in three different states namely: solid, gaseous and liquid. Elements that are found in nature are classified as matter. Since, these elements are grouped as matter, they can either be found as either solids, liquids or gases at normal temperature and pressure.
At normal temperature (20°C or 293K) and pressure (1 atm), the following elements are found to exists in the respective state of matter:
Solid: Calcium (Ca) and potassium (K)
Liquid: Mercury (Hg) and bromine (Br)
Gaseous: Oxygen (O) and fluorine (F)
Which of the following is NOT a product of photosynthesis?
A. glucose
B. energy
C. oxygen
D. carbon dioxide
B is the answer..............
Answer:
D. Carbon Dioxide
Explanation:
Carbon is what enters the plant. It isn't a product of the plant.
ANSWER THIS QUESTION AS QUICK AS YOU CAN YOU WILL GET BRAINLY AND PIONTS PLEASE HELP ASAP!!!!!!!!!!!!!!!!!
Which of the following is NOT true about comparisons between analog and digital signals?
Question 3 options:
Digital signals are pulses of voltage that switch currents on an off in devices like computers.
Analog signals are used to convert sound waves into electronic signals.
Digital signals are more prone to distortion.
Analog signals are more prone to distortion.
Answer:
Explanation: Analog signal is continuous in nature as it is well defined for every specific time. More specifically, it is the one defined continuously for a range of values with time. These are represented as a sinusoidal waveform. The figure below represents an analog signal:
analog signal
As we can see here that the signal is continuous in nature as its every value is specified for each particular interval of time, thus, is referred as the continuous-time signal. For the purpose of recording the analog signals, the actual signal must be preserved as only in that case we can record the accurate analog signal.
However, whenever in any application there arises a need to change an analog signal into a digital one then through sampling this can be achieved. In the sampling technique, this signal is sampled at certain fixed time intervals and the sampled voltage is converted into digital values.
Definition of Digital Signal
A type of signal which is non-continuous in nature as it is defined only for a set of discrete times is known as a digital signal. More simply, we can say, it is specified at some particular time instants only. Thus, here the information is represented as a set of discrete values. The figure given below shows the signal representation in digital form:
digital signal
Here it is clear that the data is discretely positioned in time axis thus is shown in the form of bits i.e., 0 and 1. This means that here the signal performs the sudden transition between 0 and 1 where these two values correspond to the two voltage levels. For the purpose of recording the signals, in the digital one, only the samples of the actual signal are taken and not the whole signal.
Key Differences Between Analog and Digital Signal
Analog and digital signals are differentiated mainly on the basis of their way to carry the information. Analog signals represent the information as a continuous function of time. As against, digital signals are represented discretely at specific time intervals.
Analog signals deteriorate more easily than digital one as their susceptibility towards noise is higher.
The devices that operate on an analog signal need more power for transmission and reception than the devices that work on the digital signal.
The information represented by the analog signal is comparatively more accurate than the digital signal due to its continuous range of values.
Analog signals are transmitted at a slower rate than digital signals as the information holds more values thus is precise.
An analog signal is defined by the amplitude, phase, frequency, etc. While the digital signal is mainly associated with bit rate, bit intervals, etc.
The sinusoidal representation of the analog signal makes it difficult to understand or get decoded thus encryption is not required in analog signals. But as the digital signals are in the form of square waves, thus, it can be decoded easily hence need to be encrypted for secured communication.
On the basis of processing, it is said that the continuous nature of the signal offers easy processing of the analog signal. However, the discrete nature of the signal offers difficultly in the processing of the digital signal.
Conclusion
Thus, the above discussion concludes that due to the way of representing the signal, the two are differentiated. And because of this, the two types of signals possess different properties and are used in different applications. Like analog signals are used in radio wave transmission and reception whereas digital signals are used in the field of digital electronics.
Which of the following best describes the material that makes us the mantle?
Answer:
A- a rigid solid
Explanation:
The Earths mantle is mainly made up of rock and rocks are rigid and are solid.
two examples for magnetic and nonmagnetic materials
Answer:
Magnetic: Iron and nickel
Nonmagnetic: Rubber, feathers and/or leather
Explanation:
Hope this helps!
Lithium is a metal,chlorine is a non metal,so LiCl would be a ______bond
a.Metallic
b.Covalent
c.Ionic
Dr. Bert Vogelstein and his partners study the causes of cancer. In 2017, they published a study of 32 types of cancer. The study concluded that most cancer cases are caused by DNA replication errors. In fact, 66% of the cancer cases they studied were caused by random DNA replication errors. Environmental factors such as diet, sunburns, and smoking caused 29% of the cancers. The last 5% of cancers in the study were caused by inherited factors.
Briefly describe the steps of DNA replication and point out one place in the code where an error can occur.
Answer:
Error or mistakes during DNA replication is accountable for two-thirds or 66% of the cancer cases. These random and unpredictable errors called mutations that occur during the division of a cell as an error in copying of DNA.
DNA replication has three main steps:
Opening and separation of DNA strands of a helix - carried by an enzyme known as helicase that breaks the hydrogen bonds between nitrogenous bases of the helix of DNA.
The priming of the template strand - DNA primase helps RNA primers to bind to both strands at 3' end as soon as it separated
strat assembling the segments of new DNA on strands called elongation of the strands with help DNA polymerase I and after forming new strands the termination of the replication.
Errors or mistakes can occasionally take place if DNA polymerase inserts a wrong base during elongation of the strands.
Why does nitrogen have stronger attractive forces between its nucleus and valence electrons than phosphorus?
Answer:
Nitrogen atom is small in size than phosphorus thus the bond between its nucleus and valence electrons are stronger than phosphorus.
Hope it helps...｡◕‿◕｡
Hey please answer this thanks.
Explanation:
Percentage composition of oxygen = (80/134) * 100% = 59.7%.
I need help :(((((((((((((((
Question 2
How does an object become negatively charged
Answer:
It gains electrons.
Explanation:
Got it right on a quiz.
When electrons are added to or taken away from an object, an electrical charge is produced. An object acquires a negative charge when electrons are introduced to it because electrons have a negative charge. An object acquires a positive charge when its electrons are removed.
When a thing picks up electrons, it becomes negatively charged. Non-metals gain electrons at the atomic level to fill their outer electron orbitals. An atom that is negatively charged and has more electrons than protons is said to be an anion.
Some atoms have the ability to draw in more electrons, making them negatively charged. Ions are defined as atoms that are not electrically neutral.
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Which phrase justifies why the theory of evolution is a theory and not a law?
1. Describes the relationship between an organism and its environment
2. Makes accurate predictions based on only a small amount of empirical evidence
3. Explains diversity based on the principle of natural selection
4. Cannot be modified with the discovery of new evidence
Answer:
2. Makes accurate predictions based on only a small amount of empirical evidence
Explanation:
For a phrase or scientific finding to be considered a law, there has to be clear evidence and facts to support that specific finding. In the case of the evolution theory, the evidence is not clear enough to make it a law
Answer:
2. Makes accurate predictions based on only a small amount of empirical evidence
Explanation:
Gas stoichiometry a sample of methane gas having a volume of 2.80 L at 25c and 1.65 atm was mixed with a sample oxygen gas having a volume 35.0L at 31c and 1.25 atm . The mixture was then ignited to form carbon dioxide and water . Calculate the volume of co2 formed at a pressure of 2.50 atm and a temperature of 125 c
Answer:
2.47 L. CO2
Explanation:
First, let's establish what we need to find. The volume of CO2 formed at a pressure of 2.50 atm and a temperature of 125 C. Now, don't let this overwhelm you. To find the volume of CO2 formed, we must first find the amount of CO2 formed.
But to find the amount of CO2 formed, we have to write out the equation for this reaction. The type of reaction depicted here is combustion, where oxygen gas reacts with a substance to form carbon dioxide and water. And we also know that this equation must be balanced, according to the Law of Conservation of Matter. It is as follows:
CH4 + 2 O2 => CO2 + 2 H2O.
Now that we have the equation of the reaction, we can now find which of the two reactants is the limiting reactant. To do this, we need to convert the volumes of methane and oxygen gas to moles. Simply use the Ideal Gas Law to do this, and you get:
Methane Gas: .189 mol | Oxygen Gas: 1.75 mol
Using the equation, we can then see that methane gas is the limiting reactant.
We know, also due to the equation that 1 mol of CO2 is produced for every mol of methane gas. This gives us the answer of .189 mol of CO2 produced. But remember, the question asks us for the volume of CO2 produced, so we must apply the Ideal Gas Law once again, getting the answer of 2.47 L. CO2.
Note: Please remember to use significant figures during your calculations, and if you have any questions, feel free to post them down below.
As the amplitude decreases in a wave, the energy increases.
Lesson 4.07
Question 6 options:
True
False
Answer:
False
Explanation:
The relationship between energy and amplitude can be written as eαa^2
This means that the energy of a wave is directly proportional to the square of the amplitude.
true or false boron carbon and nitrogen I have the same valence electrons
Answer:
false
Explanation:
Because in a periodic table they are not located below each other and therefore do not have the same number of electrons.
Define symbole and valeny.
Answer:
Chemical symbol
This is used to identify an element without having to write the full name and as such is a designation for the element. It is used in chemical reactions and is usually either one or two letters. Some symbols are, Iron - Fe, Hydrogen - H and Oxygen - O.
Valency
This refers to the capacity of an element to combine with another to form a compound. It is measured by the number of electrons that an atom of an element gains, looses or shares when a chemical reaction involving it takes place.
Scientists were studying three different embryos to determine their relationship to humans. The notes about each embryo are shown in the chart. Based on the information, what can you determine?
Answer:
Species A and C are related to humans.
Explanation:
got it right on edge.
Answer:A. Species And C are related to humans
Explanation: In the embryo humans and other Species have gill slits, and a tail. Vestigesof tales grew and non-human ancestors. On rare occasions, aremnant of the tail through and embryological development, although this tale of course has no function. An embryos splits are found in the boreals of all vertebrates because they share a common ancestors with fish and which structures first
Acids containing polyatomic ions are named according to the name of the anion. true or false
Answer:
true
Explanation:
Names for such acids consist of the prefix “hydro-“, the first syllable of the anion, and the suffix “-ic”. Complex acid compounds have oxygen in them. For an acid with a polyatomic ion, the suffix “-ate” from the ion is replaced with “-ic.”
what is the # of Electrons in carbon?
Answer:
Carbon dioxide (CO2)
Ethene (C2H4)
Methane (CH4)
Explanation:
Newton determined that the attractive force between two masses was DIRECTLY proportional to:
Answer:
This is Newtons 2nd Law: Force is directly proportional to the acceleration of the object, acceleration is inversely proportional to the mass of the object.
What is the energy of a photon (J) that has a wavelength of 105 nm?
Answer:
3.46
⋅
10
−
19
J
The energy of a photon is proportional to its frequency, as stated by the Planck - Einstein's equation
E
=
h
⋅
ν
, where
E
- the energy of the photon
h
- Planck's constant, equal to
6.626
⋅
10
−
34
J s
ν
- the frequency of the photon
Now, notice that you are given the wavelength of the photon,
λ
. As you know, frequency and wavelength have an inverse relationship described by the equation
λ
⋅
ν
=
c
, where
c
- the speed of light in vacuum, approximately equal to
3
⋅
10
8
m s
−
1
This means that the relationship between energy and wavelength looks like this
λ
⋅
ν
=
c
⇒
ν
=
c
λ
E
=
h
⋅
c
λ
Another important thing to notice here is that the wavelength of the photon is given in nanometers,
nm
. You need to convert this to meters, the unit used for the value of the speed of light.
E
=
6.626
⋅
10
−
34
J
s
⋅
3
⋅
10
8
m
s
−
575
⋅
10
−
9
m
=
3.46
⋅
10
−
19
J
Explanation:
Brainliest please?
7th grade science , please don’t get the answer from the internet :(
Answer:
See the answer below
Explanation:
1. Organisms produce energy for cells by chemically breaking down and unlocking the energy locked-up within food materials in a process known as cellular respiration. The unlocked energy is then utilized for the cell's metabolic activities.
2. Cellular respiration can be aerobic or anaerobic.
Aerobic respiration involves the breakdown of carbohydrates in the presence of oxygen to yield energy in the form of ATP while carbon dioxide and water are produced as by-products.
[tex]C_6H_1_2O_6 + 6O_2 --> 6CO_2 + 6H_2O + ATP[/tex]
Anaerobic respiration involves the breakdown of carbohydrates in the absence of oxygen to produce ATP and lactic acid as a by-product. The lactic acid is later oxidized to carbon dioxide and water to prevent it from building up.
[tex]C_6H_1_2O_6 -> 2C_3H_6O_3 + ATP[/tex]
3. Photosynthesis and cellular respiration are both considered metabolic processes that take place in living organisms. However, photosynthesis is peculiar only to green plants and some algae while respiration is common to all living organisms. While photosynthesis is anabolic, that is, it involves the building up of materials; respiration is said to be catabolic because it involves the breaking down of materials.
During photosynthesis, inorganic products are utilized to produce carbohydrates for plants with oxygen gas released as a by-product according to the following equation:
[tex]6CO_2 + 6H_2O --> C_6H_1_2O_6 + 6O_2[/tex]
During respiration, the food taken by living organisms is broken down to unlock the energy in it for metabolic activities according to the following equation:
[tex]C_6H_1_2O_6 + 6O_2 --> 6CO_2 + 6H_2O + ATP[/tex]
A football player has to run 60 meters in 5 seconds or less in order to make the all-star team. What is the slowest speed he can run in order to qualify for the all-star team?
Explanation:
It is given that,
A football player has to run 60 meters in 5 seconds or less in order to make the all-star team.
We need to find the slowest speed he run in order to qualify for the all-star team. Let it is v. It can be calculated as follows :
v = d/t
= 60 m/5 s
= 12 m/s
It means his slowest speed is 12 m/s and he should increase his speed in order to qualify for the all-star team.
A spaceship is traveling through space. Suddenly, its speed increases. What can
you say about the kinetic energy of the spaceship?
A. The kinetic energy increases as its speed increases.
B. The kinetic energy decreases as it is converted into speed.
C. The kinetic energy remains the same because speed and kinetic energy are not
related.
D.There is no way to know what happens to the kinetic energy.
Answer:
A. The kinetic energy increases as its speed increases.
Explanation:
The kinetic energy of an object is energy possessed by an object by virtue of its motion.
Now, kinetic energy of a moving body is given by;
KE = 1/2 mv^2
Where;
m = mass of the body
v = velocity (speed) of the body
It follows that if the mass of the spaceship is constant, a sudden increase in speed leads to a corresponding increase in the kinetic energy of the spaceship in accordance with the relationship show above.
Answer:
You'll speed up! A. Because the kinetic energy increases as its speed increases.
Explanation:
How many molecules are in 33.6 liters of neon (Ne) gas at STP?
Answer:
moles or atoms?
Explanation:
you can't have a molecule of any so there's two different answers that I can give you:
how many moles? 1.5
how many atoms? 9.03x10^23 atoms
At STP 1 mole of an ideal gas occupies 22.4L.
33.6 L x 1 mol/22.4 L = 1.5 moles of Neon
1.5 moles Ne x 6.02x1023 atoms/mole = 9.03x1023 atoms
9.03x10²³ molecules are in 33.6 liters of neon (Ne) gas at STP. At STP 1 mole of an ideal gas occupies 22.4L.
What is atom?The smallest unit of matter that may be split without producing electrically charged particles is the atom. It is also the smallest piece of substance with chemical element-like characteristics. Electric forces, which link electrons towards the nucleus of atoms, cause them to be drawn to any positive charge.
Space makes up the majority of an atom. The remainder is made up of a cloud of negatively charged electrons around a positively charged nucleus made up of protons and neutrons. Compared to electrons, that are the smallest charged particles in nature, the nucleus is tiny and dense.
At STP 1 mole of an ideal gas occupies 22.4L.
33.6 L x 1 mol/22.4 L = 1.5 moles of Neon
1.5 moles Ne x 6.02x10²³ atoms/mole = 9.03x10²³ atoms
Therefore, 9.03x10²³ molecules are in 33.6 liters of neon (Ne) gas at STP.
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what is the relationship between the thickness of the book and the ability of the magnet to hold on to and attract the paper clips?
Answer:
The thicker the metal, the harder it is for the magnet to attract more paper clips.
Explanation:
There exists a relationship between the paper and the paper clip. The more is the thickness of the paper the stronger the paper clip will be. As size has the ability to attract and affect.
In another sense the stronger is the metal of the paper clip the tighter will be the element of the magnet Thus more will be the ability of the magnet to keep hold of the paper. Hence the closer is the magnet the more is the grip.Learn more about the relationship between the thickness of the book.
brainly.ph/question/4895114.
WHICH DEFINTIOION GOES TO EACH LETTER/WORD. FILL IN THE BLANK
-
The place inside Earth where the energy is an earthquake is centered is the ________.
-
The instrument used to record earthquake activity is a/an __________.
-
The __________ of an earthquake is the point on the surface of Earth directly above the focus.
-
The __________ of an earthquake is based on the amplitude of the seismic waves.
-
An undersea earthquake may produce a/an _________.
-
Buildings constructed to withstand most earthquakes are said to be _________ ________.
-
_______ is magma that has flowed onto Earth's surface.
-
The __________ is divided into about 13 major plates.
-
________ are long cracks produced at divergent plate boundaries.
-
The __________ scale measures the magnitude of an earthquake.
-
The seismic waves that do the most damage to structures and property during an earthquake are _________ _________.
-
An avalanche of glowing rocks flowing on a cushion of hot gases is called a/an ___________ __________.
-
A large, broad volcano with gently sloping sides that is formed by the build-up of basaltic layers is a ________ volcano.
-
A relatively small volcano formed by moderate to explosive eruptions of tephra is a _________________ volcano.
-
A steep-sided volcano formed from alternating layers of violent eruptions of tephra and quieter eruptions of lava is a ___________ volcano.
-
The movement of the ground that occurs when rocks inside Earth pass their elastic limit, break suddenly, and experience elastic rebound is called a/an ______________.
-
A fracture that occurs when rocks break and that results in relative movement of opposing sides is called a ________.
A.
lava
B.
fault
C.
seismic safe
E.
shield
F.
cinder-cone
G.
focus
H.
tsunami
I.
rifts
J.
seismograph
K.
hot spot
L.
surface waves
M.
epicenter
N.
Richter
O.
lithosphere
P.
earthquake
R.
composite
T.
magnitude
Cherylanne mixes together Chemical A and Chemical B in a test tube, forming Chemical C. The mixture instantly turns cool to the touch. She then adds Chemical D, and the reaction becomes hot and explodes. What can be known about this situation? Chemicals A and B form an endothermic reaction, and chemicals C and D form an exothermic reaction. Chemicals A and B form an exothermic reaction, and chemicals C and D form an endothermic reaction. Chemicals A and C form an endothermic reaction, and chemicals B and D form an exothermic reaction. Chemicals A and B form an exothermic reaction, and chemicals B and D form an endothermic reaction.
Answer:
Chemicals A and B form an endothermic reaction, and chemicals C and D form an exothermic reaction.
Explanation:
The reaction that produced chemical C is an endothermic reaction whereas, the reaction between C and D is an exothermic one.
An exothermic change is one in which heat is liberated to the surroundings. So the surrounding becomes hotter at the end of the reaction.
An endothermic reaction is a change in which heat is absorbed from the surrounding and hence the surrounding colder at the end of the change.
We can see that the first reaction is endothermic. The second reaction is exothermic.Answer:
A or 1Explanation:
Chemicals A and B form an endothermic reaction, and chemicals C and D form an exothermic reaction.the rest are wrongChemicals A and B form an exothermic reaction, and chemicals C and D form an endothermic reaction.
Chemicals A and C form an endothermic reaction, and chemicals B and D form an exothermic reaction.
Chemicals A and B form an exothermic reaction, and chemicals B and D form an endothermic reaction.
Please answer for me.
Answer:
54.5%
Explanation:
The percentage composition of oxygen in C₆H₈O₆ can be obtained as follow:
Molar mass of C₆H₈O₆ = (12×6) + (8×1) + (16×6)
= 72 + 8 + 96
= 176 g/mol
Next, there are 6 oxygen atoms in C₆H₈O₆. Therefore the mass of oxygen in C₆H₈O₆ is:
Mass of Oxygen = 16 × 6 = 96 g
Finally, we shall determine the percentage composition of oxygen in C₆H₈O₆ as follow:
Percentage of oxygen =
Mass of Oxygen/mass of C₆H₈O₆ × 100
Percentage of oxygen = 96 / 176 × 100
Percentage of oxygen = 54.5%
Thus, the percentage composition of oxygen in C₆H₈O₆ is 54.5%.
1. Mixing is a physical change.
True or false
Answer:
false it is a chemical change
Which of the following chemical formulas CANNOT be simplified into an empirical formula?
a) C4H16O5
b) N8H4F4
c) Ca2Br4
d) Mg5I10
Answer:
The answer is a) [tex]C_{4} H_{16} O_{5}[/tex]
Explanation:
The other chemical formulas' subscripts share a common factor, so they can be simplified to an empirical formula, however, the subscripts in [tex]C_{4} H_{16} O_{5}[/tex] cannot be simplified any further, because they do not share any more whole-number factors with each other.