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3 years ago

The image shows Mary happily swinging in the park. There are

Chemistry

1 answer:

Alexeev081 [22]3 years ago

4 0

Answer:

Kinetic energy is highest at point B and Lowest at point A

Explanation:

The kinetic energy is directly proportional to the square of velocity. Therefore, the kinetic energy will be maximum at the point where the velocity is maximum. An it will be lowest at the position where the speed is the lowest. The speed is maximum at point B, because its the mean position. Hence, K.E will be max at B. Also speed is lowest at the highest point so, Kinetic Energy will be lowest at point A.

Another method can be used as follows:

Since, there are two energies present here, namely kinetic energy and potential energy that are interchanging with each other. From law of conservation of energy the sum of kinetic energy and potential energy must be equal at each point. Potential energy is directly proportional to height of object. So, the potential energy will be maximum at point A due to maximum height and consequently Kinetic energy will be minimum at point A. Similarly, the potential energy will be minimum at point B due to minimum height and consequently Kinetic energy will be maximum at point B. Therefore,

Kinetic energy is highest at point B and Lowest at point A

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A high concentration of water has ____________ dissolved particles than a low water concentration.

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A high concentration of water has fewer dissolved particles than a low water concentration.

Most cell membranes are not as easily permeable to many dissolved compounds as water is. There is a quick and constant flow of water. From one area with less dissolved matter to another with more, water transports NET. Or, if you want, from an area with a lot of water to one with little water. The terms isotonic, hypotonic, and hypertonic refer to the concentration of dissolved material. In a medium, such as the extracellular fluid, every distinct material has a concentration gradient that is unique from the gradients of other substances. Every substance will diffuse in line with that gradient as well.

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2 years ago

which characteristics of an element can be determined by considering only the element’s specific location on the periodic table?

Nadusha1986 [10]

Answer:

Gas, Solid, or liquid

Explanation:

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3 years ago

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Natural gas is almost entirely methane. A container with a volume of 2.65L holds 0.120mol of methane. What will the volume be if

mrs_skeptik [129]

The final volume of the methane gas in the container is 6.67 L.

The given parameters;

initial volume of gas in the container, V₁ = 2.65 L
initial number of moles of gas, n₁ = 0.12 mol
additional concentration, n = 0.182 mol

The total number of moles of gas in the container is calculated as follows;

$n_t = 0.12 + 0.182 = 0.302 \ mol$

The final volume of gas in the container is calculated as follows;

$PV = nRT\\\\\frac{V}{n} = \frac{RT}{P} \\\\\frac{V_1}{n_1} = \frac{V_2}{n_2} \\\\V_2 = \frac{V_1 n_2}{n_1} \\\\V_2 = \frac{2.65 \times 0.302}{0.12} \\\\V_2 = 6.67 \ L$

Thus, the final volume of the methane gas in the container is 6.67 L.

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3 years ago

An unknown triprotic acid (H3A) is titrated with NaOH. After the titration Ka1 is determined to be 0.0013 and Ka2 is determined

e-lub [12.9K]

Answer:

6.68 X 10^-11

Explanation:

From the second Ka, you can calculate pKa = -log (Ka2) = 6.187

The pH at the second equivalence point (8.181) will be the average of pKa2 and pKa3. So,

8.181 = (6.187 + pKa3) / 2

Solving gives pKa3 = 10.175, and Ka3 = 10^-pKa3 = 6.68 X 10^-11

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3 years ago

Diffrence btwn a period and a group

Tpy6a [65]

Rows of elements are called periods. The period number of an element signifies the highest unexcited energy level for an electron in that element.

Columns of elements help define element groups. Elements within a group share several common properties. Groups are elements have the same outer electron arrangement.

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