a 4 kg ball swings in a vertical circle on the end of an 60-cm-long string. the tension in the string is 20 n when its angle from the highest point on the circle is θ=30∘.

Answer:

I believe the answer is A

Explanation:

Work and energy are related because when you work, you cause displacement in the object you are exerting upon. While this happens, you transfer energy between the systems. Both work and energy share the same SI unit, called the joule.

Answer:

a. Cellular Respiration produces more ATP than Anaerobic Respiration.

Explanation:

Cellular Respiration creates a total of 36-38 ATP per round. Anaerobic processes only produce 2 ATP per cycle.

Water

Milk

Juice

Hot choclate

Answer: The answer is B). Hot Chocolate, Juice, Milk, Water.

Explanation: For the second row, I put the temperature (in °C) in the descending order that looks like this: 50°C, 40°C, 35°C, 15°C.

I hope that my answer is very helpful to your own question about listing these drinks in descending order by starting with the drink whose particles have the highest kinetic energy, please mark me as Brainliest and have a great P.A. Day and weekend! :D

Sincerely,

Jason Ta,

The ambitious of Brainly and the role of The TDSB and WHCI Student of the high school.

Explanation:

T = 409.5 K, P = 1.50 atm: V = 22.4 L The ideal gas law is: PV = nRT where. P = pressure. V = volume n = number of moles.

The correct option is B. Remain the same.

When converting a pressure from units of torr to millimeters of mercury, the numeric value will remain the same.

Both torr and millimeters of mercury (mmHg) are units of pressure that are equivalent to each other.

The numerical value of the pressure will not change when converting between these two units.

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Answer: \(1.07\times 10^{23}\) molecules

Explanation:

According to the ideal gas equation:

PV=nRT

P = Pressure of the gas = 1 atm ( at STP)

V= Volume of the gas  = 4.00 L

T= Temperature of the gas in kelvin = 273 K ( at STP)

R= Gas constant = 0.0821Latm/kmol

n=  moles of gas= ?

Putting in the values we get:

\(1atm\times 4.00L=n\times 0.0821Latm/Kmol\times 273K\)

\(n=0.178mol\)

Now 1 mole of any substance contains \(6.023\times 10^{23}\) molecules at STP

Thus 0.178 mole of any substance contains = \(\frac{6.023\times 10^{23}}{1}\times 0.178=1.07\times 10^{23}\) molecules at STP

Thus there are \(1.07\times 10^{23}\) gaseous molecules in the flask.

Explanation:

169.7/12 = 14.14

42.4/1 = 42.4

14.14 : 42.4 = 1 : 3

Hence we have CH3.

Answer:High-purity chemicals are all-the-more important during the manufacturing process because chemicals are often used in bulk. ... In plastics, for example, an impure chemical substrate can produce an end-product that's too brittle to use. In pharmaceuticals, one impure component can render a drug dangerous

Explanation:

However, without further information, it is difficult to determine what the concentration or percentage of the carbon dioxide is in the solution.
If we assume that the 12.1 grams of carbon dioxide are evenly distributed throughout the 4.9 liters of solution, we can calculate the concentration of carbon dioxide in the solution.
To do this, we can use the formula:
Concentration (in g/L) = mass of solute (in g) / volume of solution (in L)
Plugging in the values we have:
Concentration (in g/L) = 12.1 g / 4.9 L
Concentration (in g/L) = 2.469 g/L
This means that the concentration of carbon dioxide in the solution is 2.469 grams per liter.
In terms of a percentage, we can calculate the percentage of carbon dioxide in the solution by using the formula:
% concentration = (mass of solute / volume of solution) x 100%
Plugging in the values we have:
% concentration = (12.1 g / 4.9 L) x 100%
% concentration = 247.959%
In conclusion, the 4.9 liter solution contains 12.1 grams of dissolved carbon dioxide, and the concentration of carbon dioxide in the solution is 2.469 grams per liter. The percentage concentration of carbon dioxide is calculated to be 247.959%, but this value is likely an error and should be interpreted with caution.
Hi! A 4.9-liter solution containing 12.1 grams of dissolved carbon dioxide refers to a liquid mixture in which CO2 gas has been mixed and dissolved. The amount of CO2 in the solution is measured by the mass of the dissolved gas, in this case, 12.1 grams.

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Answer:

3.2.4.5.1

Explanation:

The emitted fluorescent light has longer wavelength and lower energy because it lost some energy to the solvent molecules and some fraction of energy is dissipated as heat.

A material that has absorbed light or other electromagnetic radiation will emit light when it undergoes fluorescence. It has a luminescent quality. Most of the time, the emitted light has a lower photon energy than the absorbed radiation because it has a longer wavelength.

Fluorescence can be seen when the emitted light is in the visible spectrum while the absorbed radiation is in the ultraviolet (UV) region of the electromagnetic spectrum, which is invisible to the human eye.

The fluorescent photons have lower energy. The non-radiative  vibrational transitions taking place in between causes dissipation of energy as heat and some energy is transferred to the solvent molecules.

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The mass of iron which is needed to react with 16.0 grams of sulphur is 28 grams

How to balanced the given equation?

The balanced chemical equation for the reaction between iron and sulfur  to form iron sulfide is:

8 Fe + S₈ → 8 FeS

From the balanced chemical equation, we can see that 8 moles of Fe react with 1 mole of S₈ to form 8 moles of FeS.

To determine the mass of iron required to react with 16 grams of sulfur, we first need to calculate the number of moles of sulfur present in 16 grams of S.

The molar mass of S is 32.06 g/mol (the atomic mass of S is 32.06). Therefore, the number of moles of S in 16 grams is:

n(S) = m(S) / M(S) = 16 g / 32.06 g/mol = 0.499 mol

The molar mass of 8 moles of iron will be 448 grams

∴56 × 8 = 448 grams

Similarly the molar mass of S₈ will be 256 grams

∴32 × 8 = 256 grams

Therefore,

256gram of Sulphur needs 448 gram of Iron

So 16 gram of sulphur will  ?

cross multiply

The mass of Iron needed =( 16 × 448) ÷256

= 7168 ÷ 256

Hence by solving the above equation we can find the mass of iron which is 28 grams

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Answer:

A

Explanation:

10ml

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The formula of the hydrate can now be written as PbSO4 . 4H2O.

The simplest way to solve the problem is through mole ratio method. For that, you will need to calculate the number of moles of each element in the given compound, as shown:

Pb = 0.884 g = 0.884 g / 207.2 g/mol = 0.00427 mol

C = 0.205 g = 0.205 g / 12.0 g/mol = 0.0171 mol

H = 0.026 g = 0.026 g / 1.008 g/mol = 0.0258 mol

O = 0.273 g = 0.273 g / 16.0 g/mol = 0.0171 mol

Water = 0.230 g = 0.230 g / 18.0 g/mol = 0.0128 mol

Then, you can calculate the molar ratio between the water and other compounds:

Pb : 0.00427/0.0128 = 0.334C : 0.0171/0.0128 = 1.33H : 0.0258/0.0128 = 2O

: 0.0171/0.0128 = 1.33

As the ratio between H and O is not 2:1, we can multiply all the values by 2 to obtain the smallest whole number ratios:

Pb : 0.668C : 2.67H : 4O : 2.67

The formula of the hydrate can now be written as PbSO4 . 4H2O.

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The  molecule that is the main product of the Calvin cycle is glucose. The Calvin cycle is also known as the light-independent reactions.

It is a series of biochemical reactions that occur in the stroma of the chloroplast in photosynthetic organisms to produce glucose. The Calvin cycle is made up of three stages: Carbon fixation, Reduction and regeneration of ribulose bisphosphate. Here's a breakdown of each stage:

Carbon fixation: Carbon dioxide enters the Calvin cycle and is converted to organic molecules. During carbon fixation, Rubisco, which is a crucial enzyme in photosynthesis, catalyzes the reaction between carbon dioxide and ribulose bisphosphate, leading to the formation of a six-carbon molecule that splits into two three-carbon molecules. This three-carbon molecule is the starting material for the reduction process.

Reduction: The ATP and NADPH produced during the light-dependent reactions are used to convert the three-carbon molecule produced during carbon fixation into glyceraldehyde-3-phosphate. This process involves a series of biochemical reactions that require the use of energy from ATP and electrons from NADPH.

Regeneration of ribulose bisphosphate: Glyceraldehyde-3-phosphate, which is the main product of the Calvin cycle, is used to regenerate the starting material for carbon fixation, ribulose bisphosphate. During this stage, ATP is used to convert the remaining glyceraldehyde-3-phosphate molecules into ribulose bisphosphate. The Calvin cycle is an essential process in photosynthesis, as it produces glucose, which is the main source of energy for plants and other photosynthetic organisms.

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Answer: 120 g

(C)

no idea what you guys are taking about in here :Kappa:

Answer:

120

Explanation:

The total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.

To calculate the total charge that flows while the battery is being charged, we can use the relationship between electrical energy, potential difference, and charge.

The electrical energy (E) stored in the battery is given as 64 mega Jules (64 MJ). The potential difference (V) provided by the battery is 330 volts. We know that the energy (E) is equal to the product of the potential difference (V) and the charge (Q):

E = V * Q

Since the charging process is 100% efficient, all the electrical energy supplied is stored in the battery. Therefore, we can rearrange the equation to solve for the charge (Q):

Q = E / V

Substituting the given values, we have:

Q = 64 MJ / 330 V

To perform the calculation, we need to convert mega Jules (MJ) to joules (J) since the SI unit of energy is joules. One mega Joule is equal to 1 million joules:

Q = (64 * 10^6 J) / 330 V

Calculating the division:

Q ≈ 193,939.39 Coulombs

Therefore, the total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.

This value represents the quantity of electric charge transferred during the charging process, and it indicates the amount of electricity that enters the battery.

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Based on the observation that Biuret reagent turns purple when added to the unknown substance, we can conclude that the substance contains protein. Biuret reagent is commonly used to test for the presence of proteins in a solution.

Biuret reagent is a solution of copper sulfate (CuSO4) mixed with sodium hydroxide (NaOH). When Biuret reagent reacts with peptide bonds in proteins, a complex is formed, resulting in a color change from blue to purple. This color change is a specific reaction for proteins and is not observed with other substances such as acids or starch.

Proteins are composed of amino acids, and the peptide bonds between these amino acids are responsible for the reaction with Biuret reagent. By turning purple, Biuret reagent indicates the presence of proteins in the unknown substance.

Therefore, the correct conclusion is that the substance contains protein (option B). The other options, such as the substance being an acid or containing starch, are not valid conclusions based solely on the observation of the purple color change with Biuret reagent.

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Answer:

Part A

The green plant is a producer

The grasshopper is a herbivore

The Rat is a Omnivore

The snake is a Carnivore

The eagle is a Carnivore

The mushroom is a Decomposer

Part B

The arrow between each organism indicates the direction of energy flow which shows the direction in which the energy transfer takes place from one organism to the next, with the general source of energy for all animals being the Sun.

Part C

A sample food chain can be presented as follows;

Sun, Green plants → worms → Frogs → Snakes → Coyotes → Bears → Tigers → Mushroom → Plants

Explanation:

Explanation:

Balance the following equation: C3H8 + O2 ----> CO2 + H2O. (There will be no need for state symbols.) First of all, to balance these equations, list the number of each atom, for both sides of the equation. In this example, it would be: The first step would be to balance out the carbons on the products side by multiplying CO2 by 3.  The balanced chemical equation for C3H8 +O2 = CO2 + H2O is C3H8 +5O2 = 3CO2 +4H2O. This is the chemical reaction in which C3H8 or propane burns in air or oxygen to produce carbon dioxide and water.

Answer:

1. Diamond

2. The Image to the far right. It's rice I believe.

Explanation:

A lustrous material is a material that shine or usually reflect light. Fire isn't a material and the powder is dull and doesn't shine. In this case the diamond is a lustrous material and not a metal.

An edible substance is anything thing that can be consumed as food. Soap is consumable and the blue picture is definetly not either so we conclude that the rice is the edible option.

Answer:

A tendon is a fibrous connective tissue that attaches muscle to bone. Tendons may also attach muscles to structures such as the eyeball. A tendon serves to move the bone or structure.

Explanation:

Answer:

Know this

(i) 1mole of a substance contains 6.022 x 10^23atoms

(ii) 1mole of a substance contains 6.022x10^23molecules

Now

1.) 4.5x10²²atoms of Cu x 1mole of Cu/6.022x10²³atoms of Cu

=0.075moles of Cu.

2.) 8.5x10²⁴molecules of N2 x 1mole of N2/6.022x10²³molecules

=14.11moles of N2

3.) 0.025moles of CH4 x 6.022x10²³molecules/1mole of CH4

=1.51x10²²molecules of CH4

4.)1.26moles of Pb x 6.022x10²³atoms/1mole of Pb

=7.59x10²³atoms of Pb

5.) 0.56moles of CO2 x 6.022x10²³molecules/1mole

=3.37x10²³molecules.

That's pretty Much Everything

Waves are disturbance that transfer energy through matter or space.

A wave can be described as a disturbance that travels through a medium, transporting energy from one location to another location without transporting matter.

The particles involved in waves move back and forth perpendicularly to the way the wave is going, but don’t move significantly in the direction of the wave. The particles ‘take part’ in the wave by bumping into one another and transferring energy. This is why energy can be transferred, even though the average position of the particles doesn’t change.

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Yes, 2AgCl → 2Ag + Cl2 is a photocatalytic decomposition reaction.

In this reaction, silver chloride (AgCl) is decomposed into silver (Ag) and chlorine (Cl2) when exposed to light. This process occurs because light energy is absorbed by the AgCl, which then undergoes a redox reaction. The absorbed energy causes the Ag-Cl bond to break, forming Ag and Cl2. This reaction is used in the production of photographic films and papers, where the silver halide (AgCl) is used as a light-sensitive material. When exposed to light, the AgCl undergoes a similar reaction, forming an image on the film or paper. The reaction is also used in water treatment, where photocatalytic decomposition is used to remove pollutants from water.

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Methane (CH4) is being considered as an alternative automotive fuel to replace gasoline. To determine the volume of 655 g of CH4 at 20°C (293 K) and 750 torr, use Ideal Gas Law: PV=nRT.

First we need to convert the mass of CH4 (655 g) to moles. The molar mass of CH4 is approximately 16 g/mol, so 655 g of CH4 is about 40.94 moles (655/16). Next, we need to convert the pressure from torr to atm. 1 atm = 760 torr, so 750 torr = 0.987 atm (750/760). Now, we can apply the Ideal Gas Law: (0.987 atm)(V) = (40.94 moles)(0.0821 L atm/mol K)(293 K). Solving for V, we get V ≈ 1046 L. Therefore, 655 g of methane at 20°C and 750 torr occupies a volume of approximately 1046 liters.

According to the Ideal Gas Law, when gases are at the same temperature, pressure, and volume (but not mass), they all have the same number of molecules. Keep in mind that the Ideal Gas rule does not apply when the temperature and pressure are just below the point at which a substance will become a liquid or solid. The combined gas law is made up of the three previously recognised laws:

Boyle's law PV = K,

Charles's law V/T = K,

Gay-law Lussac's P/T = K.

The combined ideal gas law's equation is therefore PV/T = K, where P is pressure, T is temperature, V is volume, and K is a constant.

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The solid pieces of lead with a mass of 38.20 g has a density of 11,340 Kg/ m3

The density formula and the procedure we will use is:

ρ = m/v

Where:

Information about the problem:

Applying the density formula, we get:

ρ = m/v

ρ = 38.20 g/ 3.37 cm3

ρ(g/cm3) = 11.34 g/cm3

Converting the density from (g/cm3) to (kg/m3), we get:

11.34 g/cm3 * (1 kg/1000g) * (1000000 cm3/1 m3) = 11,340 Kg/ m3

11.34 g/cm3 is equivalent to 11,340 Kg/ m3

It is a physical quantity that expresses the ratio of the body mass to the volume it occupies.

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