1.
The ___________ energy in a mechanical system is determined by adding the potential and kinetic energy together.


total
massive
2.
The initial ___________ energy is equal to zero because the starting point is set at zero height to make things easier.


kinetic
potential
3.
In the example, the final kinetic energy is determined to be ___________ because at the peak height, the ball instantaneously stops.


positive
zero
negative
4.
In this system, potential and kinetic energy are ________________ proportional.


inversely
directly

Answer:

a.)  

To warm the liquid from 35°C to 78°C:

(2.3 J/g-K) x (42.0 g) x (78 - 35) = 4154 J

To vaporize the liquid at 78°C:

(38.56 kJ/mol) x (42.0 g C2H5OH / 46.06867 g C2H5OH/mol) = 35.154 kJ

Total:

4.154 kJ + 35.154 kJ = 39.3 kJ

b.)  

To warm the solid from -155°C to -114°C:

(0.97 J/g-K) x (42.0 g) x (-114°C - (-155°C)) = 1670 J

To melt the solid at -114°C:

(5.02 kJ/mol) x (42.0 g C2H5OH / 46.06867 g C2H5OH/mol) = 4.5766 kJ  

To warm the liquid from -114°C to 78°C:

(2.3 J/g-K) x (42.0 g) x (78 - (-114)) = 18547 J

To vaporize the liquid at 78°C:

35.154 kJ  (as in part a.)

Total:

1.670 kJ + 4.5766 kJ + 18.547 kJ + 35.154 kJ = 59.9 kJ

Explanation:

 1021.27 J heat is required to heat 9.61g of ethanol from 24.1⁰C to 67.3⁰C

The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.

It is a measure of how much energy it takes to raise the temperature of a substance. It is the amount of heat necessary to raise one mass unit of that substance by one temperature unit.

It is given by the formula -

                                                  Q = mcΔT

where, Q = amount of heat

m = mass

c = specific heat

ΔT = Change in temperature

Given,

Mass of ethanol = 9.61g

Initial temperature = 24.1⁰C

Final temperature = 67.3⁰C

Q = mcΔ T

        = 9.61 × 2.46 × ( 67.3 - 24.1)

         = 1021.27 J

Therefore,  1021.27 J heat is required to heat 9.61g of ethanol from 24.1⁰C to 67.3⁰C

Learn more about Specific heat, here:

https://brainly.com/question/11297584

#SPJ3

All the foursingle neutron /proton in the image coming out of the chain reactions and bombarding are responsible of producing a chain reaction.

It is the change in the identity or characteristics of an atomic nucleus, induced by bombarding it with an energetic particle.

The bombarding particle may be an alpha particle, a gamma-ray photon, a neutron, a proton, or a heavy ion.

In the given image of a nuclear reaction the objects which could hit other atoms, producing a chain reaction are all the four single neutron /proton coming out of the chain reactions and bombarding.

To know more about nuclear reactions

https://brainly.com/question/12786977

#SPJ5

Answer:

Picture of model of a nuclear reaction attached.

Explanation:

Answer:

When there is an increased number of sun spots, it means the surface temperature is decreased which will decrease the temperature of the Earth's surface as well.

Explanation:

Sunspots are temporary phenomena on the Sun's photosphere that appear as spots darker than the surrounding areas. They are regions of reduced surface temperature caused by concentrations of magnetic field flux that inhibit convection. Sunspots usually appear in pairs of opposite magnetic polarity.

Answer:

A i took the test

Explanation:

good luck ;)

Answer:

just do the lab or what ever

Explanation:

because your just taking notes and taking data

Answer:

C.11

Explanation:

Boron-11 makes up around 80% of all natural Boron. And, typically, the quickest way to determine the most abundant isotope of an element is to just round the atomic mass to the nearest whole number.

Answer: The moles of gas are in the container are 0.08

Explanation:

According to ideal gas equation:

[tex]PV=nRT[/tex]

P = pressure of gas = 1.0 atm

V = Volume of gas = 2.0 L

n = number of moles = ?

R = gas constant =[tex]0.0821Latm/Kmol[/tex]

T =temperature =[tex]300K[/tex]

[tex]n=\frac{PV}{RT}[/tex]

[tex]n=\frac{1.0atm\times 2.0L}{0.0821L atm/K mol\times 300K}=0.08moles[/tex]

Thus the moles of gas are in the container are 0.08

Protons are located in the nucleus of the atom along with neutrons, have a positive charge, and a mass of 1.673 x [tex]10^{-27}[/tex] kg.

Answer:

Since we can't utilize charges to make sense of what number of every particle we have (as we did with ionic mixes), we need to determine with prefixes mono-, di-, tri-, tetra, penta-, hexa-,, etc.

Answer:

Oxygen

Explanation:

Water's formula is H20. Which is two hydrogen and one oxygen.

Answer:

A.

Explanation:

the boiling point is 4172 F

The correct answer is 'Eukarya because the organisms are all eukaryotic' since the organisms mentioned have cells with nuclei. Bacteria and Archaea are both prokaryotic and do not contain organisms with eukaryotic cells.

The correct answer to the question is A) Eukarya because the organisms mentioned are all eukaryotic. This means that the cells of these organisms contain nuclei. The domain Eukarya includes diverse groups such as animals, plants, fungi, and protists. These kingdoms are distinguished by the presence of eukaryotic cells, which differentiate them from prokaryotic cells found in the other two domains, Bacteria and Archaea, both of which lack a nucleus. Bacteria and Archaea are known as prokaryotes and often consist of single-celled organisms. Eukarya, on the other hand, can consist of both unicellular and multicellular organisms. Therefore, Option B 'Eukarya because the organisms are all prokaryotic' is incorrect as eukaryotes have a nucleus. Option C 'Bacteria because some of the organisms are autotrophs' is not correct either since autotrophy is not exclusive to Bacteria and does not define domain classification on its own. Lastly, Option D 'Archaea because the organisms are all diverse bacteria' is incorrect because Archaea is a separate domain, and it encompasses organisms that are genetically distinct from bacteria and eukaryotes, despite their prokaryotic cell structure.

Explanation:

the convection currents in the oven produced by the heat, cooks both the bottom and the top at the same rate.

Answer:

Explanation:

The air is heated by the heat source in the oven. The hot air rises, surrounds the bread, and heats the bread on all sides.

Answer:

C

Explanation:

The diagram which shows electrons violating the Pauli exclusion principle is: C. a box containing an up and a down arrow and 2 other up arrows.

The Pauli exclusion principle can be defined as a principle which states that no two electrons (fermions) in a single atom can have the same values for all four (4) of their electronic quantum numbers.

Furthermore, this principle states that the orbital of an atom can only contain a maximum of two electrons, and they must have opposing spin orientations.

In conclusion, the diagram which shows electrons violating the Pauli exclusion principle is a box containing an up and a down arrow and 2 other boxes with 2 up arrows, that are having the same spin orientations as shown.

Read more on Pauli exclusion principle here: https://brainly.com/question/10386902

#SPJ2

Answer:

a

Explanation:

Answer: The amount of carbon-14 left after 10 years is 25 g

Explanation:

Formula used :

[tex]a=\frac{a_o}{2^n}[/tex]

where,

a = amount of reactant left after n-half lives = ?

[tex]a_o[/tex] = Initial amount of the reactant = 100 g

n = number of half lives =[tex]\frac{\text {given time}}{\text {half life}}=\frac{10}{5}=2[/tex]

Putting values in above equation, we get:

[tex]a=\frac{100g}{2^2}[/tex]

[tex]a=\frac{100g}{4}=25g[/tex]

Therefore, the amount of carbon-14 left after 10 years is 25 g

Answer:

D

Explanation:

because macroscopic is visible to the naked eye.

Answer:

427.50

Explanation:

The question requests for the missing particle in a nuclear reaction involving the Potassium isotope. Unfortunately, the reaction is incomplete. Nonetheless, the conservation laws of atomic number and atomic mass would be employed to find the missing particle if the equation was complete.

In this nuclear reaction, both the atomic number and the atomic mass must be conserved. For atomic numbers (proton numbers), you add the atomic numbers on one side of the equation and set it equal to the sum of atomic numbers on the other side. The same thing applies to atomic mass (proton + neutron numbers). However, the nuclear reaction is not complete.

This question is seeking to determine the missing particle in this nuclear reaction involving potassium (K). The missing part of the nuclear equation would help us determine the product particles after a certain type of nuclear decay. Unfortunately, the reaction is not completely given, if it were we could utilize conservation laws to identify the missing particle.

https://brainly.com/question/21410544

#SPJ6

Answer:

The rotational period of the moon is equal to one revolution around Earth.

I think  this is the answer am not that positive.

Explanation

Only one side of the Moon is visible from Earth because the Moon rotates on its axis at the same rate that the Moon orbits the Earth – a situation known as synchronous rotation, or tidal locking. The Moon is directly illuminated by the Sun, and the cyclically varying viewing conditions cause the lunar phases.

Answer:

The rotational period of the moon is equal to one revolution around the earth

Explanation:

I took the test. Hopes this helps :)

Answer:

more observations could help resolve differences in the scientists explanations

Explanation:

Making additional observations is crucial when scientists have differing explanations for an observation. More observations provide more data points, increasing the validity of their findings, and can help resolve differences by giving a more comprehensive understanding of the situation.

When two scientists make differing explanations about an observation, making more observations is necessary to better understand the event or phenomenon under investigation. Additional observations provide more data points, which add validity to their findings and may lead to a consensus if they consistently show a particular trend. Through additional observations, they can eliminate potential biases or errors that may have occurred in their initial observation. Consequently, more observations might help in resolving differences in the scientists' explanations due to a better, more comprehensive understanding of the observation with varied perspectives.

https://brainly.com/question/36314822

#SPJ2

Answer:

c . Desert

Explanation:

desert biome is character as a drive with temperature ranging from Hot cold and little plant life .

Answer:

desert

Explanation:

the desert does not have a diverse community with animals, is very dry with little precipitation, and is usually incredibly hot but has a cold/warm temperature at night in the winter.

When you dissolve acid in water  positive hydronium ions are released. Therefore, the correct option is option A.

Any material that when dissolved in water has an acidic taste, may alter the color of some indicators (such as reddening blue litmus paper), can react with some metals (such as iron) to release hydrogen, can combine with bases to produce salts, and can accelerate some chemical changes (acid catalysis).

Acids are examples of both organic chemicals that belong towards the carboxyl group, sulfonic acid, as well as phenol groups as well as the inorganic substances referred as the mineral acids, such as sulfuric, nitric, hydrochloric, as well as phosphoric acids. When you dissolve acid in water positive hydronium ions are released.

Therefore, the correct option is option A.

To learn more about acid, here:

https://brainly.com/question/29796621

#SPJ6

Answer:

They will share electrons .

Explanation:

When P and O2 reacts, they will share electrons as both of the elements are non-metals.

Only metal elements such as K , Na , Ca , etc. can transfer electrons to the other non-metal elements.

A base turns red litmus blue. Litmus paper is paper that has been treated with a specific indicator, a mixture of 10 to 15 natural dyes that turns red in response when the pH is acidic, and blue when it is basic.

Final answer:

Gasoline has a higher energy density than electricity stored in lithium-ion batteries, enabling more energy to be carried per unit of weight. Gasoline vehicles can refuel quickly, offering convenience for long-distance travel, while electric vehicles require longer recharge times. Additionally, gasoline's safety profile is relatively high given its energy content, as it burns rather than explodes.

Explanation:

One of the main advantages that gasoline has over electricity for powering cars is its higher energy density. Gasoline contains approximately 13 kWh/kg, while the energy density of lithium-ion batteries is about 0.2 kWh/kg, which is substantially lower. This means that gasoline can deliver more energy per unit of weight than batteries can, making it a more energy-dense fuel source.

An additional advantage is the rapid refueling capability of gasoline vehicles. A car can fill its tank with gasoline at a rate of 15 MW, allowing it to be ready for further travel in a matter of minutes, whereas electric cars often require hours to fully recharge. This convenience factor is a significant benefit for long-distance travel or in situations where quick refueling is necessary.

Safety is another aspect where gasoline has an advantage. Although gasoline is flammable, it is not as explosive as one might think—the vapor mix with oxygen burns rather than explodes, making it relatively safe for an energy source with such high energy content.

Answer:

its sunspots :)

Explanation:

can i pleasee have the brainiest tyty

for my rank

Answer:

2MnO2 (s)

Explanation:

3KCN(aq) + 2KMnO4(aq) + 1H2O(l) → 3KCNO(aq) + 2MnO2(s) + 2KOH(aq)

Reactants:

K: 5

C: 3

N: 3

Mn: 2

O: 9

H: 2

Products:

K: 5

C: 3

N: 3

Mn: 2

O: 9

H: 2

Answer: The temperature of the heated gas is 357 K

Explanation:

To calculate the final temperature of the system, we use the equation given by Gay-Lussac Law. This law states that pressure of the gas is directly proportional to the temperature of the gas at constant pressure.

Mathematically,

[tex]\frac{P_1}{T_1}=\frac{P_2}{T_2}[/tex]

where,

[tex]P_1\text{ and }T_1[/tex] are the initial pressure and temperature of the gas.

[tex]P_2\text{ and }T_2[/tex] are the final pressure and temperature of the gas.

We are given:

[tex]P_1=8.53atm\\T_1=293K\\P_2=10.4atm\\T_2=?[/tex]

Putting values in above equation, we get:

[tex]\frac{8.53}{293K}=\frac{10.4}{T_2}\\\\T_2=357K[/tex]

Hence, the temperature of the heated gas is 357 K

8 slices of cheese are required to make 8 ham sandwiches from 16 slices of bread based on the stoichiometry of the reaction.

The balanced equation of the production of ham sandwich is given below:

[tex]2H + C +T+5P+ 2B \rightarrow H_2CTP_5B_2 \\ [/tex]

From the stoichiometry of the reaction, 2 slices of bread and 1 slice of cheese are required to make 1 atm sandwich.

There are 16 slices of bread present to make ham sandwich.

Number of slices of cheese required = 16/2 = 8 slices.

Therefore, 8 slices of cheese are required.

Learn more about stoichiometry at: https://brainly.com/question/16060223