As a pendulum swing from its highest to its lowest position along an arc, what happens to its kinetic energy and potential energy

A. Both the potential energy and kinetic energy decrease

B. The potential energy decreases while the kinetic energy increases

C. The kinetic energy decreases while the potential energy increases

D. Both the potential energy and kinetic energy increase

We assume that the gas is an ideal gas in order to solve this. The ideal gas equation, which is written as PV = nRT, can then be used. (922/760) x 35.3/315 = 1 x V2 /273. V2 = 37.1L. As a result, choice D) is correct.

STP, 1 mole of gas occupies a volume of 22.4 L (molar volume). At standard temperature and pressure (STP), molar volume (Vm) is the volume occupied by one mole of a chemical element or compound. It can be calculated by dividing the molar mass (M) by the mass density (ρ). Gas volume is defined as the space occupied by gas particles at standard temperature and pressure conditions. Represented by a "V". The SI unit of volume is the liter, denoted L. One mole of gas has a volume of 24 m3 or 24000 cm3 at room temperature. This value is called the molar volume of the gas.

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Answer:

Explanation:

Answer:

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Answer:

a. physical

b.chemical

c.chemical

d.physical

Explanation:

A. You can easily unbend the wire and reverse the change

D. No new products were created

THE ANSWER IS B AND C AS CHEMICAL CHANGES

Answer:thank you

Explanation:because I’m lazy

(a) Writing an Initial Value Problem for the amount of salt in the tank at any time t<60)Initial Value Problem (IVP) is a differential equation accompanied by initial conditions. The differential equation we will use is:

(b) Solving the IVP in part (a) to find the amount of salt in the tank at any time t<60)To solve this differential equation, we can use the integrating factor method. The integrating factor is:

(c) Determining the amount of salt when the tank is half emptyThe tank is half empty when there is 30 gallons of solution in it. Since the tank is emptied in one hour, this happens when there is 30 gallons of brine in the tank. Therefore, the amount of salt in the tank when it is half empty is:y(60) = (2/3) + (2/3)e^(-3 × 60/V)We need to find V to solve for y(60). We know that the tank starts with 60 gallons of water, and 1 gallon of brine enters every minute and 3 gallons of solution leave every minute. Therefore, the volume of the tank is:

Salt is a collection of chemical compounds with the main component Sodium Chloride (NaCL) being the same as table salt. The process of making salt in Indonesia is generally by evaporating seawater using sunlight or other heat sources. Salt is made by collecting seawater and then evaporating it with sunlight so that only the salt crystals remain. Traditional salt making is by channeling seawater into ponds with the help of windmills.Apart from being a natural preservative, salt also has many other benefits. As for some of the benefits of salt for the body is to help the digestive system. Salt is believed to help the digestive system because salt can stimulate the digestive enzymes chloride and protein which help digestion.

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Answer:Bunser buner

Explanation: It is meant to heat solid and liquid substance in the lab.

Answer:

211.0

Explanation:

∆G(free energy) = ∆H(enthalpy) - T∆S(entropy)

∆H = 215KJ/mol

T = 90°C = 273 + 90

= 363K

∆S = 11J/mol/K or 11 × 10^-3kJ/mol/K

∆G = 215- 363(11 × 10^-3)

= 215 - 3.993

= 211.007

To the nearest tenth 211.0

Answer: no

Explanation: theres a chance but generally no because there can be different substances in different amounts which can have similar volumes

According to the question the reaction A+B→C+D is exothermic.

Reaction in chemistry is a process in which two or more substances interact to form a new substance. Chemical reactions involve the breaking of chemical bonds and the formation of new bonds. Chemical reactions are essential for the formation and breaking of molecules, and are responsible for the production of energy.

a) The reaction A+B→C+D is exothermic.

b) The AH for the forward reaction is the difference between the enthalpies of the products and the reactants. The AH for the backward reaction is the difference between the enthalpies of the reactants and the products.

c) X would represent the position of the activated complex on the graph.

d) The activation energy for the forward reaction is the difference between the enthalpies of the reactants and the activated complex. The activation energy for the backward reaction is the difference between the enthalpies of the products and the activated complex. The forward reaction is expected to be faster because it has a lower activation energy.

e) On the same set of axes, the graph would show a decrease in the activation energy with the use of a catalyst, resulting in a lower energy barrier and faster reaction rates.

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Answer:

Explanation:

3.81 m. = 150 inches.

I can't find explanation. Hope this is my best!

Based on the Hund's Rule, the three electrons in a 2p orbital are arranged as shown in option C.

The term orbital refers to a region in space where there is a high probability of finding the electron. We know that an electron in an atom could be defined by the use of four sets of quantum numbers which are;

Hund's rule states that, electrons occur singly before pairing takes place. In this case, we can see that the only arrangement that obeys the Hund's Rule is option C.

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The molar mass of element X is 75 g/mol.

m(X₄O₆) = 59.4 g; mass of the compound

m(O) = 14.4 g; mass of oxygen in the compound

n(O) = 14.4 g ÷ 16 g/mol

n(O) = 0.9 mol; amount of oxygen in compound

m(X) = m(X₄O₆) - m(O)

m(X) = 59.4 g - 14.4 g

m(X) = 45.0 g; mass of element X

Ratio of the elements in the compound: n(X) : n(O) = 4 : 6.

n(X) = 0.9 mol × 4 / 6

n(X) = 0.6 mol; amount of element X in the compound

M(X) = m(X) ÷ n(X)

M(X) = 45.0 g ÷ 0.6 mol

M(X) = 75 g/mol; molar mass of element X

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Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\\)

From the question

mass = 12 g

volume of pencil = 6 cm³

We have

\(density = \frac{12}{6} \\ \)

We have the final answer as

Hope this helps you

Answer:

NRC: Seabrook nuke plant ran safely in 2020, concrete degradation being monitored. SEABROOK — According to federal experts, annual inspections throughout 2020 show NextEra Energy Seabrook's nuclear power plant again ran safely over the past year.

Explanation:

The two statements that are true regarding the memory module labeled pc2-6400 are:

The module has a peak transfer rate of 6400 MB/s: The term "pc2-6400" indicates the peak transfer rate of the memory module. Here, "pc2" refers to the type of memory technology (DDR2), and "6400" indicates the peak transfer rate in megabytes per second (MB/s).

The module is compatible with a motherboard that supports DDR2 RAM: Since the memory module is labeled as DDR2, it is compatible only with motherboards that support DDR2 RAM. PC2-6400 indicates that the memory has a peak transfer rate of 6400 MB/s, which is a standard for DDR2 RAM.

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Yes, the solubility information provided in the graph can be summarized as follows:

In summary, the solubility of barium nitrate (Ba(NO₃)₂) increases with temperature, with higher temperatures allowing for more solute to dissolve in the solvent (water).

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Answer:

solution is equal distribution of a solute and liquid

Explanation:

for example water and sugar make a solution

Solutions with a uniform composition are homogeneous solutions. A homogeneous solution, then, has an equal concentration of the constituent substances throughout the entire solution.

Similar to how water molecules are evenly distributed among the Na+ and Cl- ions when sodium chloride dissolves in it. The mixture's composition is constant throughout, and it is difficult to separate the components from one another. Solutions are homogeneous mixtures, which can contain substances in either state (solid, liquid, or gas).

Even if the components were evenly dispersed, they could still be separated at some point in a homogeneous mixture. The components may need to be separated using a procedure like evaporation, distillation, or chromatography, but this is still possible.

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Explanation:

\(C_{(s)} + O_{2(g)} \rightleftharpoons CO_{2(g)}\)

According to le ch-atelier's principle when a chemical reaction at equilibrium subjected to any stress, then the equilibrium shifts in that direction in which effect of stress is reduced.

When we would add more number of carbon in above reaction then rate of forward reaction will increase to attain the equilibrium again.

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Answer: 60 minutes per hour, sixty miles per hour, therefore, one mile per minute.

Explanation:

The challenges do scientists face in studying the sun is that due to high amount of heat, it is impossible to see sun.

Sun is a ball of hydrogen and helium gases which may produce large amount of heat as a result of nuclear fusion reaction.

High amount of heat is produced in the sun so it is not possible to see the sun from the normal eyes. Scientist uses telescope with mant filters to see a clear picture of the sun. Scientists are also not able to go near to the sun as produced heat is that much of power as they burn any object.

Hence above challenges are scientist face.

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The chemical equation for the reaction of HClO4 with H2O is:

HClO4 + H2O → H3O+ + ClO4-

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According to the kinetic theory, the molecules of a gas are in constant random motion and collide with the walls of the container.

We know that a gas has no specific volume, owing to the fact that the molecules of a gas do not experience significant intermolecular interaction, a gas molecule moves at very high velocity.

Hence, according to the kinetic molecular theory, a single gas molecule moves at high velocity and frequently collides with the walls of the container.

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Answer:

Edge 2021

Explanation:

Gas particles act like tiny, solid spheres.

Gas particles are in constant, random motion.

Gas particles obey Newton’s laws of motion.

Faster particles collide more often and with more force.

Collisions are elastic, there is no energy lost as the particle hits the sides.

The statement the water in the cup will have the same amount of heat (thermal energy) as the water in the container is true ,therefore option C is correct.

Thermal energy refers to the energy contained within a system that is responsible for its temperature. Heat is the flow of thermal energy.

The SI unit of thermal energy is the joule (J). It is the energy contained within the system, excluding the kinetic energy of motion of the system as a whole and the potential energy of the system.

The statement the water in the cup will have the same amount of heat (thermal energy) as the water in the container is true ,hence, option C is correct.

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Gain ; Negative.

................................

Answer:

gain; negative

Explanation:

Cl is nonmetal

The change in enthalpy is -1380 kJ. The amount of heat released or absorbed during a reaction that takes place under constant pressure is referred to as the enthalpy change.

The difference in enthalpy between the reactants and products is measured by the change in enthalpy of a reaction. The energies required to build new chemical bonds and break existing ones are what determine a system's enthalpy. The enthalpy change that occurs during a reaction is the heat that enters or exits the system. An important aspect that affects whether a reaction may occur is whether the enthalpy of the system increases (i.e., because energy is added) or lowers (i.e., because energy is given off). Enthalpy is a state function, therefore the amount of enthalpy that changes throughout a reaction depends only on two factors: the masses of the substances that are reacting and the physical states of the reactants and products. It is independent of how reactants are transformed into products.

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What is the change in enthalpy in kJ when 2.30 mol of Mg is completley reacted according to the following reaction

2Mg(s) + O2(g) > 2MgO(s)

Delta H = -1204 kJ

there are 4 sig figs

The symbol [He] represents the electron configuration of a helium (He) atom. Helium has two electrons, and its electron configuration is 1s^2.

The [He] notation is used to indicate that the core electrons of the element being referred to have the same electron configuration as a helium atom.

In the case of [He], it implies that all electrons in the 1s orbital are considered core electrons. Core electrons are the electrons that are closest to the nucleus and are not involved in chemical bonding or interactions with other atoms. They are generally not shown in chemical equations or reactions as they do not participate in the chemical behavior of an element.

So, the symbol [He] implies that the core electrons include the two electrons in the 1s orbital of the element being described.

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Answer:

C

Explanation:

ionic bonds are bonds between metals and non-metals or metalloids ,so the only compound with a metal is KB

The form of motion which is described is velocity as it is describing the speed as well as the direction.

Motion is defined as a phenomenon which is described with respect to change in object's position with respect to time.It is given in terms of displacement,velocity,distance ,acceleration,speed.

Branch of physics which deals with motion of objects without any reference to it's cause is called kinematics while the branch which studies forces and their effects on motion is called as dynamics.

Motion applies to various systems like objects,bodies, matter particles ,radiation ,curvature.There are three laws of motion which are proposed by Newton.Classical mechanics is based on Newton's law of motion.Relativistic  mechanics is based on modern kinematics.

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