Thermal expansion or thermal contraction would be most noticeable in which of the following?A. Hot car seat
B. Concrete in a sidewalk
C. Air inside a balloon
D. Liquid in a drink

Answers

Answer 1

Answer: The answer is C. Air inside a balloon. This is because gases are much more affected by thermal expansion and contraction compared to liquids and solids. The reason behind this is that gas molecules are very loosely packed, so even the slightest changes in temperature have a big effect on its pressure and volume. If the air inside a balloon has a temperature rise, the tendency is for the balloon to expand and potentially explode.

Liquids are also affected by thermal expansion or contraction, but not as much as gases. Solids tend to maintain their shape under thermal expansion or contraction.

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The function of most proteins depends primarily on the

Answers

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1.type and order of amino acids. 2.environment of the organism.3.availability of starch molecules.

The average kinetic energy of water molecules is greatest in which of these samples?(1) 10 g of water at 35°C(2) 10 g of water at 55°C(3) 100 g of water at 25°C(4) 100 g of water at 45°C

Answers

Answer : The correct option is, (2) 10 g of water at 55°C

Explanation :

Average kinetic energy of the gas particle is directly proportional to the temperature of the gas particle.

Formula used :

$K.E=(3)/(2)(RT)/(N_A)$

where,

R = Gas constant

T = temperature

$N_A$ = Avogadro's number

From this we conclude that the kinetic energy is directly proportional to the temperature where 'R' and $N_A$ are constant. That means kinetic energy depends only on the temperature not on the mass.

(Higher the temperature, higher will be the kinetic energy)

Hence, the average kinetic energy of water molecules is greatest in 10 g of water at 55°C.

Final answer:

The sample with the highest average kinetic energy of water molecules is (2) 10 g of water at 55°C.

Explanation:

Kinetic energy is a fundamental concept in physics that describes the energy an object possesses due to its motion. It depends on both an object's mass and its velocity. Objects in motion have kinetic energy, and the faster they move or the more massive they are, the greater their kinetic energy. This energy can be transferred or transformed but is always conserved in a closed system.

The average kinetic energy of water molecules depends on the temperature of the water. The higher the temperature, the greater the average kinetic energy. In this case, the sample with the highest average kinetic energy would be (2) 10 g of water at 55°C. This sample has a higher temperature than the other options, therefore, the water molecules in this sample have the highest average kinetic energy.

Learn more about Average kinetic energy of water molecules here:

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Which law states that the volume of a gas is proportional to the moles of the gas when pressure and temperature are kept constant?

Answers

I believe this would be Avogadro's law which states ''Equal volumes of all gases, at the same temperature and pressure, have the same number of molecules regardless of their chemical nature and physical properties.''

Answer:

boyles law

Explanation:

A build up of electric charge on an object

Answers

Static electricity is build up of electrical charges on the surface of some object materials.

Static electricity just did the test

A sample of 0.3257 g of an ionic compound containing the bromide ion (Br−) is dissolved in water and treated with an excess of AgNO3. If the mass of the AgBr precipitate that forms is 0.7165 g, what is the percent by mass of Br in the original compound?