Answer:
An endothermic process is any process with an increase in the enthalpy H (or internal energy U) of the system. In such a process, a closed system usually absorbs thermal energy from its surroundings, which is heat transfer into the system.
Which of the following is not likely to occur if a city loses its tax base due to economic decline? A. The city will have fewer police and fire fighters. B. City residents will have adequate health care and hospital services. C. The city will have a decline in public housing. D. Public and private buildings will decay.
Answer:
B.
City residents will have adequate health care and hospital services.
Explanation:
the correct answer for edg 2020
Answer:
B
Explanation:
Which belief is the basis of Ptolemy's geocentric model of the solar system?
Answer:
"Earth-centered," or "geocentric" Ptolemy thought that all celestial objects — including the planets, Sun, Moon, and stars — orbited Earth. Earth, in the center of the universe, did not move at all.
Explanation:
Answer:
Geocentric
Explanation:
Its the belief that earth was the center of the solar system instead of the sun
How do scientist respond to experimental observations that don’t match current theories?
Answer: The results of the experimental observations should coincide with the facts of the current theories.
Explanation:
The scientific theory can be defined as the well defined as supported explanation for a natural phenomena. It is based upon the facts observed and also supported by the evidences obtained from the experimental trials.
If the experimental observations do not match with the concept of current scientific theory then the scientific either perform the experiment with the same scientific methodology or can switch to another scientific methodology to satisfy the facts of the current theories.
someone help me please i’ll give brainly
Answer:
solid
liquid
Gas
plasma
Highest to lowest energy : plasma, gas, liquids, solids
I need help with figuring out how to calculate the frequency of light, because my teacher's notes are generic. When I asked her about it on top of another question; she only answer that other question" and never talked about the notes.
Answer:
See explanation
Explanation:
The general formula used to obtain the frequency of a wave is;
v=λf
where;
v = speed of the wave
λ= wavelength of the wave
f= frequency of the wave.
Now, the speed and wavelength of light in various media are known.
If we plug the value of the speed of light and the wavelength of light into the formula given above, we can obtain the frequency of light.
The frequency of a photon of light can also be obtained from Plank's equation;
E= hf
where;
E =energy of the photon of light
h = Plank's constant
f= frequency of the photon.
This is used when the energy of the photon of light is supplied or can be calculated using the wavelength of light provided in the problem.
if one species of rabbit, the gene for brown fur ( B) is dominant, while the gene for black fur ( b) is recessive. One rabbit has the dominant allele for brown fur and the recessive allele for black fur. Another rabbit has two recessive alleles. If the two rabbits have offspring, what are the odds of one of the offspring having brown fur?
Answer:
1/2
Explanation:
According to this question, the gene coding for fur color in rabbits contains two alleles viz: alelle for brown fur ( B) is dominant, while the allele for black fur ( b) is recessive. This means that an heterozygous rabbit (Bb) will have brown fur.
Based on the question, one rabbit has the dominant allele for brown fur and the recessive allele for black fur i.e genotype Bb, another rabbit has two recessive alleles i.e. genotype bb. If these two rabbits cross i.e. Bb × bb, the proportion of the offsprings produces will have Bb, Bb, bb and bb genotype.
Bb is dominant, hence, 1/2 of the offsprings will be brown furred.
one species of rabbit, . the two rabbits have offspring, what are the
CAN U GUYS HELP ME ON THIS ONE PLEAASE IM TOO DUMB YO ANSWER THIS ONE IM NOT EVEN LYING TOO PLUS THIS ASSIGNMENT WAS DUE LAST FRIDAY :(
CH3Br Draw out the work for all 4 steps for the Lewis structure.
Grading Criteria:
a. Correctly count the total valence electrons (2pt)
b. Correctly identify and draw the location of the central atom and surrounding atoms. (2pt)
c. Correctly draw the total amount and location of the electrons on the lewis structure. (2pt)
Answer:
For CH3Br, there are a total of 14 valence electrons. Hydrogen always goes on the outside, and since Carbon is less electronegative than Bromine, we'll put the Carbon in the center and the Bromine on top. We have 14 valence electrons for the CH3Br Lewis structure. Put two between atoms to form chemical bonds.
Explanation:
what percent of a sample of a radioactive element whose half life=5.0 years will decay after 25 years?
Answer:
Calculate the rate of decay constant for U-238 if its half-life is 4.468 × 109 years. Answer: If the problem is referring to the half-life, then the ratio of = 0.5 because half of the original sample has already undergone decay.
Explanation:
State the law of conservation of mass in mathematical terms.
Answer:
The law of conservation of mass states that no atoms are lost or made in a chemical reaction. Instead, the atoms join together in different ways to form products . This is why, in a balanced symbol equation, the number of atoms of each element is the same on both sides of the equation.
why is water being on the moon important?
Answer:
In order for people to survive, we need water. If we wanted to live on the moon, we would need water.
Answer:
Gravity
Explanation:
So water on the moon turns into fine ice dust, when you pour it.
What information can a foliated metamorphic rock provide you about the conditions under which it formed?
Un estudiante de noveno año decide realizar varias mezclas de compuestos quimicos y tiene un frasco rotulado con la formula quimica: MgO ¿cual es el nombre del compuesto?
Answer:
- Oxido de magnesio
Explanation:
Mg → magnesio
O → oxígeno
La unión del oxígeno (no metal) con un metal, forma el determinado óxido que se nombra como óxido de .... y el no metal.
En este caso, podemos deducir que el contenido del frasco es de óxido de magnesio, aunque viendo que hay un sólo átomo de oxígeno podemos llamarlo como monóxido de magnesio, similar al CO (monóxido de carbono).
A partir de que el magnesio sólido entre en contacto con el aire, se produce MgO de acuerdo a la siguiente reacción:
2Mg + O₂ → 2MgO
A population of panthers lives in the southeastern United States. Over 50 years, the size of the panther population in the region increased. What best explains the increase in the size of the panther population?
Explanation:
Because the panthers live in the southeastern region of the United states they have increased in population in that region. They have been able to gain more food and have adapted more to there environments. Which allows to increase and reproduce more. That is why the Panthers in the southeastern United states have increased In population. I hope this works for you and that it helps. I don't mind helping someone who has a question! From, me.
A population of panthers lives in the southeastern United States. Over 50 years, the size of the panther population in the region increased. More panthers were born than died explains the increase in the size of the panther population.
What is the largest panther in the world?The jaguar, also known as the panther, tigre, or onza, is the world's largest and most powerful cat. Human activities endanger this cat, as they do the Florida panther (Puma concolor).
Because the anteater population will have fewer energy storage molecules available due to the smaller ant population, the anteater population will reproduce less.
Panthers can be found in the southeastern United States. The region's panther population has grown over the last 50 years. Because no animal eats panthers, the panther population is always growing.
Thus, More panthers were born than died explains the increase in the size of the panther population.
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If the solid, liquid, and gas forms of a substance
are made up of the same type of particles, How
could a substance change from one state to
another?
presence of heat can change solid tu liquid
and liquid to gas
A laboratory hydrogen generator collects the gas produced by bubbling it through water. The total pressure of the gas collected is 751 mmHg. The temperature is 34 °C, at which water vapor pressure is 40.0 mmHg. Calculate the partial pressure of the hydrogen.
Answer:
[tex]711\ \text{mmHg}[/tex]
Explanation:
[tex]P_{total}[/tex] = Total pressure = 751 mmHg
[tex]P_{water}[/tex] = Vapor pressure = 40 mmHg
[tex]P_{gas}[/tex] = Pressure of gas
The total pressure in a system is given by Dalton's law
[tex]P_{total}=P_{gas}+P_{water}\\\Rightarrow P_{gas}=P_{total}-P_{water}\\\Rightarrow P_{gas}=751-40\\\Rightarrow P_{gas}=711\ \text{mmHg}[/tex]
The partial pressure of the hydrogen is [tex]711\ \text{mmHg}[/tex]
what elements are the monomers of proteins made of?
Answer: Proteins are known as biomolecules and biomolecules are made of the elements Carbon, Hydrogen, Nitrogen, and Oxygen and the monomers of proteins are known as amino acids.
What is the temperature of lukewarm water? Select the better estimate.
80°C
80°F
Answer:
80°F
Explanation:
Lukewarm means moderately warm. 80°C (176°F) water is extremely hot and could burn someone. 80°F (26 2/3°C) is moderately warm.
What is the order of decreasing reactivity of these 4 metals?
Answer:
Ca, Mg, Zn, Cu
Explanation:
Refer to the Reactivity Series where each metal is more reactive than others.
Identify the following examples as either physical or chemical change.
(Ill give brainliest if right)
Answer:
19. Physical
20. Physical
21. Chemical
22. Physical
23. Chemical
24. Chemical
25. Physical
Explanation:
Calculate the wavelength of radiation with a frequency of 7.13 x 1020 s-1
Answer:
λ = 4.2x10^-13 m
Explanation:
c = λν
c is speed of light 3x10^8 m/s
λ is wavelength
ν is frequency
3.10^8 = λ . 7.13 × 10^20
λ = 4.2x10^-13 m
Devin had a bucket of shredded metals the metals consist of aluminum steel and copper he tried sorting the mixture by running it through a filter but this did not sort the mixture into separate components what can devin conclude
Answer:
Devin's problem can be solved by exploiting the activity series of metals.
Explanation:
This determines what metals are more reactive and would be readily displaced in a reaction.
Seeing as they are both metals scraps of similar sizes, filtration isn't a solution. But since Copper is lower on the activity series than Aluminium, adding an acidic solution (say tetraoxosulphate VI solution) to the mixture, would have aluminium in solution and Cu as residue which can then be filtered off.
I hope this was helpful.
Which is heavier, calcium or selenium?
Answer:selenium
Explanation:
Answer: Nether
Explanation: Because if you have one pound of Calcium and one pound of selenium there both the same weight
In Ionic compounds,metals____ valence electrons and nonmetals_____ valence electron
Answer:
bf v
Explanation:
bgf
Help pls. Are they a pure substance or mixture?
Answer:
Pizza is difintly a mixture the other i have no idea..im pretty sure CO2 is a substance btw im sorry I wish I could help more Hope this helps! :)
Explanation:
Answer:
Mixture
?
Pure
Pure
Pure
Pure
Mixture
Mixture
Pure
Pure
Mixture
Pure
Explanation:The answers are on google. Im not sure what they mean by hunter.
In the cell, amino acid molecules combine to form
Answer:
A polypeptide chain!
Explanation:
Hopefully this helps! If this wasn't the answer you were looking for please don't hesitate to comment here or private message me! Have a nice day/night! :))
Amino acids are the fundamental building blocks of proteins. In the cell, amino acid molecules combine to form polypeptide chain or protein.
What are amino acid ?The term amino acids are defined as the building block of the protein. Amino acids are the fundamental building blocks of proteins. Their molecule contains both an amino and a carboxylic group.
Alpha-amino acids are amino acids that have an amino and a carboxyl group attached to the same carbon atom, i.e., an alpha-carbon atom. Glycine, Alanine, etc.
Proteins are made up of monomers called amino acids. A protein is composed of one or more linear chains of amino acids, each of which is referred to as a polypeptide.
Thus, In the cell, amino acid molecules combine to form polypeptide chain or protein.
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The particles in liquids and gases show random motion. What does that mean and why does it occur??
Answer:
Liquids and gases show random movements because of potential and kinetic energy.
It happens when heat is applied to the particles and they gain more potential and kinetic energy and move around faster. With gases, they have the most energy.
If anything doesnt make sense, make sure to message me
Answer:
The particles show random motion because liquid and gas particles do not have a rigid structure, unlike solid particles. They are free to go anywhere.
Explanation:
aluminum oxide is an ionic substance with formula al2o3. explain what this formula means.
Answer:
the 2 means there are 2 al and the 3 means there are 3 o
Explanation:
I hope this helps
12) A 17.92 g sample of copper was submerged in water, and the volume reading rose by 2.00 mL. What is the density of the copper sample?
Hey there!:
Mass = 17.92 g
Volume = 2.00 mL
Density = ??
Therefore:
D = m / V
D = 17.92 / 2.00
D = 8.96 g/mL
Hope this helps!
The density of an object is obtained as the ratio of mass of an object to its volume.
In science, density is defined as mass per unit volume. The volume of an object is the same as the volume of water displaced by the object.
Since the volume of water rose by 2.00 mL, then the volume of copper is 2.00 mL.
The density is now; mass/volume
Mass = 17.92 g
Density = 17.92 g/2.00 mL
= 8.96 g/ml
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What particles form the nucleus of an atoms?
Answer:
Protons and neutrons
Explanation:
The particles to forms the nucleus of an atom are the protons and neutrons of the atoms.
These materials are located in the tiny nucleus and contributes the most mass of the atom.
Protons are the positively charged particles in an atomNeutrons do not carry any charges. Sum of the protons and neutrons gives the mass number of the atom.A large rift valley can be found along the east coast of Africa. It has been slowly widening over time, and it is now wide enough to contain many large lakes.
Which of these best explains the slow widening of this rift valley over time?
Group of answer choices
Earth's rotation
wind and water erosion
the Moon's gravitational pull
lithospheric plate movement
Answer:
wind and water erosion
Answer:
C is the answer