Sound travels in waves. Sound waves are compression waves. Pick the place where it is impossible to hear sounds.

A)



B)



C)



D)

Answer:

The gas pressure decreases by half its initial value.

Explanation:

From Boyle's law, the reationshipp between volume and pressure at constnat temperature is an inverse one. This proves that as the volume of a gas increases, its pressure decreases respectively. So, the answer to the question is that the gas pressure would decrease accordingly.

Hello there!

Sometimes it is good to go on a diet for us. Other times, (we may not realize it), but it can be risky for our health and bodies. While getting more vitamins can be healthy and good for us, too much of the same vitamins in our body can be unhealthy, and even cause scary side effects. Do not be misled, the title “vitamin”, does not mean “use generously”. Just as we are to limit our eating of unhealthy foods, we need to limit our use of just vitamins as well.

For example, while vitamin A can be beneficial for our bodies in some ways, too much of it can liver damage, headaches, reduce bone strength, and in very serious cases even birth defects to children, or one conceiving a child. Yes, we need just enough to keep us healthy an active. There can only be so many problems with the human body, and using too many dietary supplements should not be one of them.

Hope this helps!

~DL

Exactly what the other guy said except its in kJ on k12. So 0.33 kJ

Answer: C. Methane

Explanation:

Heat is the amount of energy transferred from and to the object or the substance of the system. When heat flows into a system its value is positive.

Change in the free energy of the system is shown as [tex]\rm (\Delta G)[/tex] it tells about the reversible work performed by the system in thermodynamically constant pressure and temperature.

The enthalpy is equal to the heat formation and is shown as [tex]\rm (\Delta H)[/tex]. It represents the total heat content of the reaction and enthalpy change of the final and the initial system.

Q or the heat when flows in the system for the reaction is a positive value as the energy of the system gets increased while when the heat is released from the reaction then the value is negative as the energy decreases.

Therefore, heat transfer to the system is positive.

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The atomic radius generally increases as we move down a group and from left to right across a period, due to an increase in energy levels and nuclear charge.

The atomic radius generally increases as we move down a group and from left to right across a period.

As we move down a group, the number of energy levels increases, resulting in larger atomic radii. This is because each subsequent energy level is farther from the nucleus.

As we move from left to right across a period, the atomic radius generally decreases. This is because the increasing nuclear charge attracts the electrons more strongly, causing the atomic size to decrease.

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The electron.

Hope this helped! :)

Answer:

The gravitational force acting on it decreases.

Answer:

he never got his brainliest...

Explanation:

Light would slow down when it goes from glass to air and from air to water due to the higher refractive indices of these media.

When light travels from one medium to another, it can undergo a change in speed and direction. The change in speed and direction is caused by the change in the refractive index of the medium. The refractive index is a measure of how much the speed of light in a medium decreases compared to its speed in a vacuum.

In the given situations, light would slow down when it goes from glass to air and from air to water. Glass and water have higher refractive indices compared to air, which causes light to slow down when it enters these media.

The molarity of the solution formed by mixing 0.20 mol of sodium hydroxide with enough water to make 150 ml of solution is 1.33 M.

To find the molarity of the solution formed by mixing 0.20 mol of sodium hydroxide with enough water to make 150 ml of solution, you need to calculate the number of moles of sodium hydroxide and then divide it by the volume of the solution in liters. Firstly, convert the volume of the solution to liters by dividing it by 1000. Then, divide the number of moles of sodium hydroxide by the volume of the solution in liters to get the molarity.

Molarity (M) = moles of solute / volume of solution (in liters)

Molarity = 0.20 mol / (150 mL / 1000) = 1.33 M

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Answer:

7. 40°C

8. 6.67°C

Explanation:

7. 20*2=40°C

8. The balloon has reduced in size by 3 times. So, the collision ant the temperature must be 3 times less. So =20/3= 6.67°C

The total count of the beans and peas in the container is 364 and green peas are 144 out of these. The percentage of green peas in the container is (144/364) * 100 = 39.56%.

To calculate the percentage of green peas amongst all the beans and peas in the container, we firstly need to total all the different type of beans and peas, and then calculate what percent of that total is made up of green peas.

Firstly, calculate the total count: 125 lima beans + 56 garbanzo beans + 39 kidney beans + 144 green peas = 364 items in total.

Next, use the formula for calculating percentages: (part/total) * 100. In this case, the 'part' is the number of green peas (144) and the 'total' is the total number of items (364). So the calculation will be: (144/364) * 100 = 39.56%. Hence, the green peas make up approximately 39.56% of the total count of beans and peas in the container.

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Final answer:

Understanding momentum and speed is crucial for designing Rube Goldberg projects, which are complex devices executing simple tasks. Momentum involves the mass and velocity of an object, while speed measures how fast an object moves.

Explanation:

The question involves concepts of momentum and speed, crucial in understanding the dynamics of a Rube Goldberg project. Rube Goldberg machines are intricate, often complicated devices that perform a simple task in a roundabout way, usually involving a series of chain reactions. Understanding momentum and speed is essential for designing these machines effectively.

Momentum is a measure of an object's motion, calculated as the product of an object's mass and its velocity. It's a vector quantity, which means it has both magnitude and direction. A fascinating example of momentum in action is the experiment where a ping-pong ball and a baseball are stacked and dropped, demonstrating how momentum transfer can cause the ping-pong ball to shoot upwards at high speed after the baseball bounces.

Speed, on the other hand, is the rate at which an object moves along a path. It's a scalar quantity, indicating it has only magnitude without direction. In Rube Goldberg projects, varying the speed of objects can influence the timing and sequence of events, making an understanding of this concept crucial for the timing aspects of your machine.

To incorporate these principles into a Rube Goldberg project, consider designing a segment where the transfer of momentum between objects is visible, like a series of dominos falling. Also, manipulating the speed of different segments can add an element of surprise or ensure the sequential activation of different parts of your machine.

Final answer:

When a poodle and a terrier mate, the size of their puppies can vary, and traits such as size are influenced by multiple genes from both breeds.

Explanation:

The specifics of how traits such as size are inherited in dogs can be quite complex because they are influenced by multiple genes, and these genes can have different modes of inheritance. When a poodle mates with a terrier, the offspring, which is a mixed breed or a crossbreed like the known cockapoo, will inherit a combination of traits from both parents. The size of the puppies can vary and may be somewhere in between the sizes of the parent breeds. To predict the exact size of the puppies, one would need information on the specific genes that determine size in both the poodle and the terrier, and how they interact when combined. While domestic dogs display a wide range of physical characteristics, most dogs of different breeds are capable of interbreeding and producing viable offspring.

Tectonic plate movements at convergent, divergent, and transform boundaries form various features: divergent boundaries create mid-ocean ridges, convergent boundaries result in subduction zones and mountain ranges, while transform boundaries lead to faults and earthquakes.

Earth'al-slipping earthquakes and offset rivers.s crust is dynamic, with tectonic plate movements giving rise to various geological features at convergent, divergent, and transform boundaries. At divergent boundaries, such as mid-ocean ridges, plates move apart and new crust is formed via upwelling magma that cools to become lithospheric rock. In contrast, convergent boundaries are locations where plates are moving toward each other, leading to subduction zones, trenches, mountain ranges, and volcanic activity. The transform fault boundaries are characterized by lateral movement of plates creating faults and leading to frequent earthquakes.

Divergent boundaries most commonly create mid-ocean ridges and new oceanic crust, with ridge push playing a role in plate motions. Convergent boundaries can form deep ocean trenches, mountain ranges, volcanic arcs, and earthquake zones, typified by the destruction of crust as one plate subducts under another. For transform boundaries, crust is neither created nor destroyed but can result in distinctive offset geological features, such as through later

a b c d no a no b yes c no d ok

Earth is the only planet in our solar system with large amounts of liquid water, a solid inner core, and a 24-hour rotation period, making it uniquely capable of supporting life.

The planet that matches the criteria mentioned in the question is Earth. Earth is the third planet from the Sun and the only one we know of that has large amounts of liquid water, an atmosphere with oxygen, and is suitable for life. Earth also has a solid inner core, a surface mostly covered with water, and a period of rotation approximately equal to 24 hours. Unlike Venus, which rotates slowly in the opposite direction, and Mars with its red soil and ice caps, Earth has conditions considered 'just right' for development and sustenance of life.

Furthermore, the outer planets are gas giants and significantly different from Earth. They do not have solid surfaces or conditions that would allow for the presence of liquid water as we know it. Earth's moon, which is large and round, is unique among the inner planets. The combination of these features validates that Earth is the planet being described.

Answer:

Mass, m = 30 grams

Explanation:

It is given that,

Density of an object, [tex]d=3\ g/ml[/tex]

Volume occupies by the silver, [tex]V=10\ ml[/tex]

We need to find the mass of a piece of silver. The mathematical formula for the density is given by :

[tex]d=\dfrac{m}{V}[/tex]

[tex]m=d\times V[/tex]

[tex]m=3\ g/ml\times 10\ ml[/tex]

m = 30 grams

So, the mass of the piece of the silver is 30 grams. Hence, this is the required solution.

The density of a Material

The density of a material is defined as the mass per unit volume

it formula is given as

Density = Mass/Volume

and the unit is g/cm^3

Explanation:

Given data

Mass = ???

Volume = 10mL

Density =  3g/ml

Hence the mass is expressed as

Mass=  density /Volume

Mass= 3/10

Mass= 0.3g

Therefore the Mass is 0.3g

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35 is the answer

hope im right

In an ecosystem, canyons are formed by water breaking the rocks into pieces.

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.There are different ecosystems present in the environment.

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