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Two key substances needed for conduction are electrons and a conductive material. Electrons serve as the charge carriers that move through the material, while the conductive material provides a pathway for the electrons to flow.

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1y ago

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What kind of cells activate the immune system when foreign substances appear?

Cells called antigen-presenting cells, such as dendritic cells and macrophages, play a key role in activating the immune system when foreign substances appear. These cells identify and capture foreign antigens, present them to T cells, and help initiate an immune response.


What is a key feature of a chemical change?

A key feature of a chemical change is the formation of new substances with different chemical properties from the original substances. This often involves the breaking and forming of chemical bonds.


What properties of a substance determines how that substances will react when combined with other substances?

The chemical structure of a substance, the presence of functional groups, and its reactivity are key factors that determine how a substance will react when combined with other substances. Additionally, factors such as polarity, acidity, and basicity also play a role in interactions between substances.


What are organic substances that that have carbon in them?

Organic substances that contain carbon include carbohydrates, lipids, proteins, and nucleic acids. Carbon is a key element in these biological molecules and is essential for life processes.


What is it called when free electrons in metals transferring energy by colliding with other atoms or electrons?

It is called thermal conduction, where free electrons in metals transfer energy through collisions with other atoms or electrons, facilitating the flow of heat throughout the material. This process is a key mechanism for heat transfer in metals.

Related Questions

How is heat transferred by conduction and what are the key mechanisms involved in this process?

Heat is transferred by conduction through direct contact between objects or substances. The key mechanisms involved in this process are the vibration of atoms or molecules in the material, which causes the transfer of thermal energy from one particle to another. This transfer continues until a thermal equilibrium is reached, where the temperatures of the objects are equalized.


Uniformitarianism is succinctly summarized by which phrase?

The key to the past is the present.


What other issue that commanders must consider could affect the quality and accuaracy of the assessment data?

Soldiers and key Leaders are not present.


Is it necessarily that a foreign key is primary key in other table?

It is not mandatory that is must be a primary key but it must be a unique key in the other table.


Which plasma protein is present in the largest amount?

Albumin is the plasma protein present in the largest amount, comprising about 60% of total plasma proteins. It plays a key role in maintaining colloidal osmotic pressure and transporting various substances such as hormones, drugs, and electrolytes in the blood.


What are the two key substances that support life?

water and oxygen


How is heat transferred in conduction and what are the key mechanisms involved in this process?

Heat is transferred through conduction by direct contact between particles in a material. The key mechanisms involved in this process include the vibration of atoms and the transfer of kinetic energy from faster-moving particles to slower-moving particles.


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Where is the return key on my mac mini?

The option key is a modifier key (ALT) present on Apple Keyboard


What substances have to be present in a leaf for photosynthesis?

For photosynthesis to occur in a leaf, three key substances need to be present: sunlight, water, and carbon dioxide. Sunlight provides the energy needed for the process, water is absorbed from the soil and transported to the leaf through the plant's vascular system, and carbon dioxide is taken in from the air through tiny pores called stomata on the leaf surface.


Who said the past is the key to the present is the key to the future?

James Hutton said this quote


Why must the paired statements in a dichotomous key be opposite?

The paired statements in a dichotomous key must be opposite in order to present two mutually exclusive choices that lead to the correct identification of an organism. This system helps users narrow down the possibilities at each step until reaching the correct classification.