After running, Ollie’s blood pressure was high. His nervous system sensed this and sent a message to decrease heart rate and blood flow.

By removing the need to build additional transmission lines and equipment, energy storage may reduce costs for utilities and their customers.

By removing the need to build additional transmission lines and equipment, energy storage may reduce costs for utilities and their customers. Energy storage's inherent ability to offer backup power in the event of grid failure is a feature that both residential consumers and commercial owners find highly desirable.

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The products of the alpha decay of radium-226 and the beta decay of carbon-14 are radon-222 and nitrogen-14, respectively.

The alpha decay of radium-226 results in the emission of an alpha particle, which is a helium nucleus consisting of two protons and two neutrons.

Therefore, the product of the alpha decay of radium-226 is radon-222:

Ra-226 → Rn-222 + alpha particle

On the other hand, In the case of carbon-14, beta minus decay occurs, in which a neutron is converted into a proton, and an electron and an antineutrino are emitted.

So carbon-14 becomes nitrogen-14:

C-14 → N-14 + beta particle

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--The complete Question is, What is the product of the alpha decay of radium-226 and the beta decay of carbon-14?--

Neutrons and protons, commonly called nucleons, are bound together in the dense inner core of an atom, the nucleus, where they account for 99.9 percent of the atom's mass. ... The neutron was discovered in 1932 by the English physicist James Chadwick.

Hope this helps : )

Answer:

Insulator

Explanation:

Answer: 13.5 minutes to run 3.2 km.

Explanation: To solve this problem, you need to convert the distance from kilometers to miles and the speed from miles per hour to kilometers per hour. 3.2 km is approximately 1.988 miles and 5.5 mph is approximately 8.851 kph. To find the time it takes to run 1.988 miles at 8.851 kph, you can use the formula time = distance ÷ speed. Plugging in the values, you get time = 1.988 miles ÷ 8.851 kph, which simplifies to approximately 0.225 hours or 13.5 minutes.

Therefore, it will take the student approximately 13.5 minutes to run 3.2 km.

Answer:

hjgihgvoj

Explanation:

The half-life of the carbon-14 obtained from the graphical representation of radioactive material remaining in a sample versus time is 5730 years.

The half-life a radioactive material is the time taken for half the material to decay or disintegrate.

For example, if the initial mass of a material is 10 g and the material becomes 5 g after 2 days. Then, we can say that the half-life of the material is 2 days.

With the above information in mind, we can obtain the half-life of the carbon-14 as illustrated below:

From the graph, we obtain:

Now, we shall obtain the time for 1/2 in the graph.

The time for 1/2 in the graph is 5730 years.

Thus, we can conclude that the half-life of the carbon-14 is 5730 years.

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Based on the formula to determine the freezing point depression of the solvent, the freezing point of the solution is 263.85 K.

The freezing point of a substance is the temperature at which the liquid changes to solid without any further decrease in temperature occurring during the process.

The addition of solute substances in liquids usually lowers the freezing point of the liquid solvent.

The formula to determine the freezing point depression of solvent is given below:

where'

The molality of the given solution = moles of solute/kg of solvent

moles of solute = 46/92

mass of solvent = 100 g or 0.1 kg

Molality of solution = (46/92) / 0.1

Molality of solution = 5

for glycerine, i = 1

ΔT = ΔT = 1 * 1.86 * 5

ΔT = 9.3

The freezing point of the solution = 273.15 - 9.3

The freezing point of the solution = 263.85 K

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Answer:

Explanation:

2 electrons

Because the atomic number of helium is 2

Answer:

1. Theoretical yield of NaOH is 22.72 g

2. Percentage yield of NaOH = 22.14%

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

NaHCO₃ —> NaOH + CO₂

From the balanced equation above,,

1 mole of NaHCO₃ decomposed to produce 1 mole (i.e 40 g) of NaOH and 1 mole (i.e 44.01 g) of CO₂.

Next, we shall determine the number of mole of NaHCO₃ that will decompose to produce 25 g of CO₂. This can be obtained as follow:

From the balanced equation above,,

1 mole of NaHCO₃ decomposed to produce 44.01 g of CO₂.

Therefore, Xmol of NaHCO₃ will decompose to 25 g of CO₂ i.e

Xmol of NaHCO₃ = 25 / 44.01

Xmol of NaHCO₃ = 0.568 mole

1. Determination of the theoretical yield of NaOH.

From the balanced equation above,,

1 mole of NaHCO₃ decomposed to produce 40 g of NaOH.

Therefore, 0.568 mole of NaHCO₃ will decompose to produce = 0.568 × 40 = 22.72 g of NaOH.

Thus, the theoretical yield of NaOH is 22.72 g

2. Determination of the percentage yield of NaOH.

Theoretical yield of NaOH = 22.72 g

Actual yield of NaOH = 5.03 g

Percentage yield of NaOH =?

Percentage yield = Actual yield /Theoretical yield × 100

Percentage yield = 5.03 / 22.72 × 100

Percentage yield of NaOH = 22.14%

Answer:

When electrons move to a lower energy level.

Explanation:

Answer:

(a) Electrode reactions:

Pt/H+/H2: 2H+(aq) + 2e- -> H2(g) (reduction)

Ag/AgCl/Cl-: AgCl(s) + e- -> Ag(s) + Cl-(aq) (reduction)

Overall cell equation: 2AgCl(s) + H2(g) -> 2Ag(s) + 2HCl(aq)

(b) Direction of motion of ions and electrons:

In the Pt/H+/H2 half-cell, hydrogen ions (H+) move towards the platinum electrode and accept electrons to form hydrogen gas (H2). In the Ag/AgCl/Cl- half-cell, silver ions (Ag+) move towards the silver chloride (AgCl) electrode and accept electrons to form silver (Ag) metal while chloride ions (Cl-) move away from the electrode. Electrons move from the hydrogen electrode to the silver electrode through the external circuit.

(c) Electrode labeling:

The Pt/H+/H2 electrode is the cathode (-) and the Ag/AgCl/Cl- electrode is the anode (+).

(d) Standard cell potential (Eo):

The standard cell potential can be calculated using the standard reduction potentials for each half-cell:

Eo(cell) = Eo(reduction, Ag/AgCl/Cl-) - Eo(reduction, Pt/H+/H2)

Eo(reduction, Ag/AgCl/Cl-) = +0.222 V (from standard reduction potential tables)

Eo(reduction, Pt/H+/H2) = 0 V (by definition)

Eo(cell) = +0.222 V - 0 V = +0.222 V

(e) Actual cell potential (E):

E(cell) = Eo(cell) - (0.0592 V / n) * log[H3O+]

where n is the number of electrons transferred in the balanced equation (2 in this case)

E(cell) = +0.222 V - (0.0592 V / 2) * log(1.0 x 10^-4 M)

E(cell) = +0.222 V - (0.0296 V) = +0.1924 V

(f) Values of constants A and B:

E(cell) = A + B.pH

At pH 7 (neutral), E(cell) = Eo(cell) = +0.222 V

Therefore, A = +0.222 V and B = -0.0592 V/pH

Answer:

A harmless nuclear fallout

Explanation:

just did this

Hydrogen and Bromine do not react when placed in a dark bottle, while it reacts explosively in a colourless transparent glass this is because colourless glass permits the visible light to reach the reaction mixture. Therefore, the correct option is option 4.

Chemical reaction, the transformation of one or more chemicals (the reactants) into one or more distinct compounds (the products). Chemical elements or chemical compounds make up substances.

Chemical reactions constitute a fundamental component of life itself, as well as technology and culture. burning fuels, manufacturing glass and pottery, smelting iron, and brewing beer. Hydrogen and Bromine do not react when placed in a dark bottle, while it reacts explosively in a colourless transparent glass this is because colourless glass permits the visible light to reach the reaction mixture.

Therefore, the correct option is option 4.

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Answer:

A. When a liquid is first placed in a closed container, the evaporation rate is higher than it is in an open container under the same conditions.

Explanation:

Evaporation refers to the process by which a liquid changes to gas or vapor. It usually occurs at the surface of a liquid.

Factors that affects evaporation include; nature of the liquid, surface area of liquid exposed, temperature and wind.

Considering the options given:

A. When a liquid is first placed in a closed container, the evaporation rate is higher than it is in an open container under the same conditions. = False

This is false because, the more the surface of the liquid exposed, the higher the rate of evaporation.

B. When a liquid is first placed in a closed container, the evaporation rate is higher than the condensation rate. = True

This is true because when a liquid is first placed in a container, the equilibrium position favors evaporation initially than condensation as saturation of the space above the liquid with vapor has not been achieved.

C. When the rates of evaporation and condensation are equal, the system has reached dynamic equilibrium.= True

Dynamic equilibrium is achieved when the rate of forward and backward reaction, in this case, evaporation and condensation are equal.

D. Vapor pressure refers to the pressure of a gas at a given temperature in equilibrium with its liquid phase. = True

E. Stronger intermolecular forces within the liquid typically result in a lower vapor pressure under a given set of conditions.  = True

Strong intermolecular forces between the molecules of the liquid causes the liquid to remain in the liquid state rather than turning to vapor, thereby lowering vapor pressure

The balanced chemical equation of the AIP+Na₂S=AI₂S₃+Na₃P is given as 2 AlP + 3 Na₂S = Al₂S₃ + 2 Na₃P.

Where:

AlP =  Aluminum Phosphide

Na₂S =  Sodium Sulfide

Al₂S₃ = Aluminum Sulfide

Na₃P =  Sodium Phosphide

The balanced chemical equation to produce aluminum sulfide (Al₂S₃) and sodium phosphide (Na₃P) from the reaction between aluminum phosphide (AlP) and sodium sulfide (Na₂S) is given as,

2 AlP + 3 Na₂S = Al₂S₃ + 2 Na₃P

Where the reaction between 2 molecules of  AlP and 3 molecules of Na₂S gives the 2 molecules of Al,3 molecules of sulfide, 5 molecules of Sodium, and 2 molecules of phosphide  Na₃P.

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To measure reaction heat under isochoric conditions, a bomb calorimeter is needed.

This device is designed to maintain a constant volume (isochoric) during the reaction, allowing for accurate measurement of reaction heat. To improve the accuracy of the coffee cup calorimeter for measuring reaction heat under isobaric conditions, a modification that could be made is to use a stirring device to ensure uniform mixing of the reactants and to minimize heat loss to the surroundings.

Additionally, a lid with a small hole could be placed over the top of the calorimeter to prevent heat loss while still allowing for pressure equalization. These modifications would help to minimize errors in heat measurement and improve the accuracy of the results obtained.

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Answer:

Answer choice B. 2

Explanation:

Answer:

The reaction rate or rate of reaction is the speed at which a chemical reaction takes place. Reaction rate is defined as the speed at which reactants are converted into products. Reaction rates can vary dramatically.

Explanation:

PLS MAKE ME AS BRAINLIST

Answer:

C

Explanation:

Warm water is heated by the Gulf Stream, a warm air current that originates in the Gulf of Mexico. As the warm water moves north, it forces cooler water to sink and move south.

the reason of which I do not believe it is a Rip Tide is because rip tides have been found in both several rivers and oceans, if not all.

-1,616.7 kJ/mol

2C₂H₂(g) +50₂(g) →4CO₂(g) + 2H₂O(g)

AGC₂H₂=209.2 kJ/mol

AGE.co2=-394.4 kJ/mol

AG H2O-228.57 kJ/mol

AG 5O2 = ?

Now From the above given equation , we have got the enthalpy of no. of moles in reaction

4 moles of CO₂ contains = 4 -394.4 kJ/mol = -1577.6

2 moles of H₂O contains = 2 -228.57  kJ/mol = - 457

2 moles of C₂H₂ contains  = 2 209.2 kJ/mol = +418.4

now putting all the values in equation

50₂(g) = 4CO₂(g) + 2H₂O(g) - 2C₂H₂(g)

50₂(g) = -1577.6-457-418

50₂(g) = -1,616.7 kJ/mol

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There are 4 main factors that affect the rate of a chemical reaction:

1. Concentration of reactants, if you have more reactants, the reaction must produce more products in order to reach equilibrium

2. Surface area, the bigger the surface area, the more collisions can occur and therefore the reaction will occur in a higher rate

3. Temperature, if you increase the temperature this means an increase of kinetic energy, which is movement, therefore with more movement, more collisions and more reaction occurring

4. Catalyst, this is a substance that the main function is to lower the energy of activation of a reaction, therefore it will increase the rate of the reaction

A

B

C

D

The number of atoms that will form the given line is  1 x 10⁹ atoms.

The number of atoms that has formed the given length is calculated as follows;

number of atoms x diameter of one atom = length of the line

The given parameters include;

diameter of an atom = 500 pm = 500 x 10⁻¹² m

Length of the line = 50 cm = 0.5 m

The number of atoms that will form the given line is calculated as follows;

number of atoms  = 0.5 m / 500 x 10⁻¹² m

number of atoms  = 1 x 10⁹ atoms

Thus, the number of atoms that will form the given line is  1 x 10⁹ atoms.

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Explanation:

hdhehdbrhdns dhdjdjdhrjs dhfirjr rudjdbe dbdud d

Answer:

Matter can change from one state to another if heated or cooled. If ice (a solid) is heated it changes to water (a liquid). This change is called MELTING. If water is heated, it changes to steam (a gas).

Explanation:

Answer:

There are 0.082 moles of He present.

Explanation:

You would use the equation PV=nRT for this problem.

P (must convert to atm) = 535 torr/ 0.704 atm

V = 2.85 L

n = being solved for

R= 0.082 (universal gas constant for atm)

T (must convert to Kelvin)  = 24.7 celsius/ 297.85 K

This equals:

0.704(2.85)= n (0.082)(297.85)

2.0064 =24.42n

n= 0.082 moles

The balls of the Newton’s cradle eventually stop because they loose energy as they collide.

The balls of the Newton’s cradle lose energy to the air as they move through it due to friction.

These balls make sound when they collide, and consequently the balls loose energy to heat upon collision.

The balls loose energy as they collide with each other and eventually stop.

Thus, we can conclude that the balls of the Newton’s cradle eventually stop because they loose energy as they collide.

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Answer:

An element is an ATOM or aggregate of atoms all of which have the same number of protons. In pure form, they will also have the same number of electrons. Each element has its own unique number of protons. For example, hydrogen always has one proton, helium always has two and lithium always has three.

Explanation:

Monounsaturated Fat 1g