Compare the sounds produce by wave A and wave B. The human ear would hear
A) wave A as a louder sound than wave B.
B) wave A as a higher pitched sound than wave B.
C) wave A and B with the same pitch, but wave A as louder.
D) wave B has a louder and higher pitched sound than wave A.

Final answer:

The insulating ability is a physical property because it can be observed and measured without altering the chemical identity of a substance. This property is related to a material's structure and does not involve chemical changes when being measured.

Explanation:

The insulating ability of a material is considered to be a physical property because it can be observed and measured without changing the substance's chemical identity. When we talk about a material's insulating properties, we're referring to its ability to prevent the transfer of heat or electricity. This is directly tied to the material's physical structure and composition, and it doesn't involve a substance undergoing a chemical reaction or changing into a new substance.

Physical properties include characteristics such as color, density, hardness, and melting and boiling points, which can all be measured without causing a change to the material's composition. In contrast, chemical properties involve a material's ability to undergo a chemical change. Examples of chemical properties include reactivity with acids, flammability, and the ability to rust.

Electrons differ from protons and neutrons in terms of their location, size, and motion.

Electrons differ from protons and neutrons in several ways. Firstly, while protons and neutrons are located in the nucleus of an atom, electrons are located in the electron cloud surrounding the nucleus. Therefore, option D, 'They are located in the nucleus,' is incorrect. Secondly, electrons are much smaller in size compared to protons and neutrons. While protons and neutrons have a mass of about 1 atomic mass unit, electrons have a negligible mass. Finally, electrons are constantly in motion and not in a fixed position, making option C, 'They are not in a fixed position,' the correct answer.

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SI stands for International system of units. Metre is a conventional unit of measuring distance.

Thus, option D is correct.

The International system of units contains the base units for quantifying any object, quantity or a substance.  The standard unit for measurement is the same world-wide.

It remains unchanged and is accepted universally. SI units remains the same in any language, in any field or area and in any condition.

SI unit is taken as the quantity of need. Any derived values are not included in SI units.

There are seven standard units included in SI system. SI units are devised for measurement of time, mass, length, temperature, current etc.

Using SI unit for measurement provides accuracy and consistency. The problem could be viewed in one dimension by all and thus solved appropriately with standard measurements.

Therefore, SI unit forms a fundamental unit for quantification in metric system.

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The formula mass of AgNO₂ is approximately 153.88 amu.

To calculate the formula mass for AgNO₂, add the atomic masses of silver (Ag), nitrogen (N), and oxygen (O). Silver has an atomic mass of 107.87 amu, nitrogen is 14.01 amu, and oxygen is 16.00 amu. Since there is one nitrogen atom and two oxygen atoms in nitrite (NO₂), you compute the mass of NO₂ by adding the atomic mass of nitrogen to twice the atomic mass of oxygen.

Formula mass of AgNO₂ = atomic mass of Ag + atomic mass of N + (2 × atomic mass of O)
= 107.87 amu + 14.01 amu + (2 × 16.00 amu)
= 107.87 amu + 14.01 amu + 32.00 amu
= 153.88 amu

Therefore, the formula mass of AgNO₂ is 153.88 amu.

The complete question is:

What is the formula mass of AgNO₂?

In an ecosystem of the southern parts of Mississippi marine fossils  belonging to the early Cenozoic era are found  which indicates that the northern parts of the state were probably above sea level.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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Explanation:

When we write a chemical reaction equation then species present on the left hand side represents the reactants. Whereas species present on the right hand side represent the products.

For example, [tex]Limestone + Heat \rightarrow Lime + Carbon dioxide[/tex]

Here, limestone is the reactant whereas lime and carbon dioxide are the products.

Thus, we can conclude that limestone is the reactant. And, both lime and carbon dioxide are the products.

Final answer:

To balance the equation Ca + H2O -> Ca(OH)2 + H2, you need to place a coefficient of 2 in front of H2O on the left side and a coefficient of 2 in front of Ca(OH)2 on the right side.

Explanation:

Balance the equation:

The equation is:

Ca + 2H2O -> Ca(OH)2 + H2

To balance this equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation.

Answer:  D. Laboratory experiments

Explanation:  Laboratory experiments are the foundations of scientific investigations.

We cannot reach to the final conclusion without performing rigorous experiments. In order to identify and control different kinds of variable, we perform experiments.

And moreover someyimes, the conclusions cannot be made without modifications in the procedure. That is where, we need to perform laboratory experiments.

Answer:

The glass bottle will get crack.

Explanation:

Volume of the glass bottles,V = 250 mL

Density of water at 20°C  = [tex]0.998g/cm^3[/tex]

Mass of water in bottle = M

Volume of water at 20°C ,V' = 250 mL ([tex] 1cm^3= 1 mL[/tex])

V>V'

[tex]Density=0.988 g/cm^3=\frac{M}{242 cm^3}[/tex]

M = 239.096 g

Since mass remains constant, the mass of liquid water will be equal to mass of water when freezes

Density of ice at -5°C = [tex]0.916g/cm^3[/tex]

Volume of the ice at  -5°C= V''

[tex]Density=0.916 g/cm^3=\frac{239.096g}{V'}[/tex]

[tex]V''=261.0218cm^3=261.0218 mL[/tex]

V''>V>V'

As we can see that volume of water has expanded on freezing and exceeded the volume of the glass bottle. This expansion will result in breaking or cracking of a glass bottle.

Final answer:

The water freezing in the bottle can cause it to crack due to the expansion of ice. The initial liquid water's density is higher than that of ice, which leads to the volume increase upon freezing.

Explanation:

The bottle will likely crack as the water inside freezes and expands. At 20°C, the water is in liquid form with a density of 0.998g/cm^3. As it freezes at -5°C, it will turn into ice with a lower density of 0.916g/cm^3, causing it to expand and exert pressure on the glass bottle, potentially leading to its breakage.

Answer:

Nylon is named as the most useful synthetic material. Nylon belongs to a family of materials called "polyamides."

Explanation: pls mark me brainiest

I think the answer would be A because when striking a match you will slide the match up and down to light then the fire will light but u can use the fire from the match to light something up so the order is Mechanical energy heat energy then light energy.

Striking a matchstick demonstrates the transformation of mechanical energy to heat energy to light energy. Therefore, option (A) is correct.

Mechanical energy is described as the sum of kinetic energy and potential energy that is utilized to do work. Mechanical energy defines the energy of a body because of its motion as well as its position.

The total mechanical energy is conserved as the energy neither be created nor destroyed. Mechanical energy can convert from one form to another but the forces for work are conservative in nature.

When you rub the matchstick with the matchbox, mechanical energy is used and the rubbing changes the mechanical energy into heat energy. The heat energy is used to break the small part of red phosphorous. As phosphorous is highly volatile, it ignites in the air and changes into light energy.

Therefore, Striking a matchstick is the correct option.

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A car slows down as it approaches a traffic light, it will be Negative acceleration.

Acceleration is a vector quantity  and it has both magnitude and direction, a second derivative of position with respect to time or first derivative of velocity with respect to time.

It is simply defined as the change in the velocity of an object which is called acceleration, here Velocity is a vector quantity with both magnitude and direction.

So acceleration can also be defined as a change in the direction or speed of an object. for example, while driving a car and pressing the accelerator makes the car go faster.

acceleration(a)= final velocity(v) –initial velocity(u) time(t)

If the velocity at the beginning was ‘u′, and the increased to velocity, ‘v′,  after "t"  time .

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Final answer:

Ecological organization ranges from the biosphere to biomes, ecosystems, communities, populations, and individuals. Biomes are large-scale environments with specific climates affecting vegetation and wildlife, organizing life in nested hierarchies.

Explanation:

In ecology, the environment can be organized into nested ecological hierarchies which, from the most complex to the simplest, are as follows: the biosphere, biome, ecosystem, community, population, and individual. The biosphere encompasses all living beings and all of their environments on Earth.

A biome is a large-scale environment, categorized primarily by characteristic vegetation and climate, and consists of many ecosystems. Each ecosystem includes a community and its non-living environment. Within an ecosystem, a community represents the sum of all living organisms residing in the same area.

This includes many populations, which are groups of individuals of the same species living in an area. Lastly, the individual is a single organism, the most basic unit in ecological organization.

Different biomes on Earth range from tropical rainforests to Arctic tundra, each distinguished by unique temperature ranges and precipitation patterns which influence the vegetation and animal life suited for those conditions.

Answer:

SiO2

Explanation:

a p e x

Answer : The correct option is, (B) 17

Explanation :

Atomic number is defined as the number of protons or number of electrons.

Atomic number = number of protons = number of electrons

Mass number is defined as the sum of number of protons and number of neutrons.

Number of neutrons = Mass number - Number of protons

As we are given that:

Number of protons in chlorine atom = 17

Number of neutrons in chlorine atom = 18

For neutral atom :

As, Atomic number = number of protons = number of electrons

So, Number of electrons in chlorine atom = Number of protons = 17

Hence, the correct option is (B) 17

Final answer:

The mass of the material is 53.4 grams.

Explanation:

The mass of a substance can be calculated by multiplying its density by its volume. In this case, the density of the material is 8.9 g/cm³ and the volume is 6 cm³. To find the mass, multiply the density by the volume:

Mass = Density x Volume

Mass = 8.9 g/cm³ x 6 cm³ = 53.4 g