Solid State Physics

Because a pager is just a radio receiver and not a radio transmitter. A cell phone or a cordless phone are both a receiver and a transmitter. A receiver uses much less battery power than a transmitter does. And because a pager's disposable alkaline battery holds more power than a cell phone or cordless phone's rechargeable battery.

yes because helium needs air around it under it in it on it to float and stay alive, but it doesn't.

wheat. The process is known as willowing and separates the wheat from the chaff.

Gold. The process is known as panning and separates the gold from silt.

uranium. The process is known as enriching and separates the docile U238 from the nasty U235

Titanium is considered one of the most resonant metals due to its high strength-to-weight ratio, which allows it to vibrate freely while maintaining its structural integrity. It is often used in musical instruments such as guitars and mandolins to produce clear and vibrant tones.

The dielectric constant of silver is approximately 5.86. This value represents the ability of silver to store electrical energy in an electric field. Silver is a good conductor of electricity, so its dielectric constant is relatively low compared to insulating materials.

Yes, laser beams exist. They are intense beams of light with specific properties that make them useful in various applications such as cutting, welding, medical procedures, and communication technologies.

The forbidden energy gap refers to the energy range within a material where electron states are not allowed to exist. This gap prevents electrons from moving freely and conducting electricity. Materials with larger forbidden energy gaps are typically insulators, while materials with smaller gaps or none are conductors or semiconductors.

Dislocation density is the areal density of dislocations intersecting a plain, usually the free surface, given as number per cm2.

It may also be the volume density of dislocation line segments, given as the total length of dislocations divided by the containing volume (also 1/cm2), but this is rarely used in semiconductor physics, and more frequently found in engineering.

Dislocation density is typically measured by etching the free surface to form pits around the location at which the dislocation breeches the surface, and is termed etch pit density, or EPD.

Blu-ray uses a shorter wavelength (405nm) compared to DVD (650nm), which allows it to have a higher storage capacity. The shorter wavelength means the laser spot can be smaller, allowing it to read and write data more densely on the disc, resulting in greater storage capacity. Additionally, Blu-ray discs use a higher numerical aperture and layering technology, further increasing their storage capacity.

The holes and electrons, together, can be found particularly in tetravalent elements like Si and Ge. It is experimentally verified that at -2730K temperature, that is at absolute zero temperature, such elements behave like a perfect insulators.

Now when temperature increases, some of the valence electrons escape into conduction band, producing a vacancy at their respective places. These vacancies are known as holes. Thus the number of hole-electron pairs always remain constant. Thus the concentration of electrons and holes remain constant at any temperature.

Yes, metallic bonding involves free-floating electrons that are delocalized and are able to move freely throughout the metal structure. These mobile electrons are responsible for many properties of metals, such as electrical conductivity and malleability.

Metals have a property called malleability, which allows them to be rolled into thin sheets without breaking. This property is due to the way metal atoms are arranged in a repeating pattern, which allows them to deform plastically without fracture.

Aerogel has a nanoporous, highly porous structure made up of interconnected clusters of nanoparticles. It has a very low density, with up to 99.98% of its volume being air. This structure gives aerogel its unique properties such as being lightweight, highly insulating, and having a high surface area.

A notch filter can be used to filter out specific frequencies, such as 50 Hz, from a signal. This type of filter is designed to attenuate a specific narrow band of frequencies while allowing other frequencies to pass through unaffected.

Yes, a marshmallow is considered an amorphous solid. Amorphous solids lack a crystalline structure and have a disordered arrangement of molecules. Marshmallows have a soft and squishy texture, characteristic of amorphous solids.

The mass of a substance is not dependent upon the shape of the substance - it is directly related only to volume through its density. Therefore, just because you squash a cube of something into a flat oval, the mass of the substance shouldn't change because the overall volume hasn't changed.

Steam has the most energy as its particles are in the gaseous state and move faster than particles in liquid water or ice, which are in the solid or liquid state respectively. Freezing water has a similar amount of energy as liquid water since they are at the same temperature.

Yes, when liquid particles freeze, they release energy in the form of heat to their surrounding environment. However, individual particles do not gain energy during the freezing process, but rather lose energy as they transition from a higher energy liquid state to a lower energy solid state.

The density changes due to differences in the density between cream and milk. Cream is lighter than water and milk is heavier than water. The average density of whole milk could be close to 1.024g per liter. When the cream is removed, the density of the milk goes up to about 1.036g per liter, while the density of the cream is about 0.968g per liter.

The average momentum of a g6 would depend on its mass and velocity. Momentum is calculated as the product of mass and velocity, so without specific values for these parameters, the average momentum cannot be determined.