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Q: Is the unit of amplitude same as that of density and pressure?
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What does the energy of a mechanical wave depend on?

The energy of a mechanical wave depends on its amplitude and frequency. The greater the amplitude (height or intensity) and frequency (number of waves per second), the higher the energy carried by the wave.

What is the si unit for amplitude?

Amplitude is used for different waves. For a water wave, the amplitude might be measured in units of length (meters or centimeters), for a sound wave, in units of pressure, for an electromagnetic wave, in terms of electrical properties, for an electrical signal, in volts, etc. - so it really depends on the kind of wave.

If the number of molecules in the atmosphere increased would the atmospheric pressure increase decrease or stay the same?

Air pressure is based on the density of molecules in the atmosphere. Density is mass divided by volume or D=M/V. By increasing the mass of air, the density increases. Decreasing volume also causes the density to increase. A high pressure zone means air has more mass per unit volume. A low pressure zone means the air has less mass per unit volume.

What is the SI unit of amplitude for sound?

The SI unit for the amplitude of sound is decibel. It is written as dB.

What does pressure equal?

Pressure is the same as force / unit area.

How does the density of one marble compare with the density of six of the marbles?

Since density is mass per unit volume, the density is the same.

What is the density of 10 gallons of a liquid?

Depends on the liquid. Also depends (at least a little) on the temperature and pressure of the liquid, although much less so than a gas. For example, at typical room temperature and pressure, mercury has a density of approximately 13,534 kg/cubic meter. Water at the same temperature and pressure has a density of approximately 998 kg/cubic meter. Also, the density doesn't depend on how much of a liquid you have. Density is mass over volume; that is, it's expressed in unit volume, so the density of 10 gallons of a particular liquid is the same as the density of 1 gallon or 100 gallons.

What does energy pressure mean?

Pressure energy per unit volume is equal to the pressure and per unit mass is equal to the density of the liquid. When an incompressible liquid flows out of a tank in which the pressure is maintained , the liquid under pressure possesses potential energy.

What is the specific gravity of solid materials?

The same as their g/cm3 density, but with no units. It is the density of that material relative to the density of water. Since water has a density of 1g/cm3 the previous answer is correct, but it is more powerful than that. If you know the density in any unit system and divide it by the density of water in that same unit system, you will get the specific gravity.

What is the unit of density and unit of relative density?

In SI system, unit of density is kg/m3 But no unit for relative density as it is the ratio of density of the material to that of water

What is the mass per unit volume of an object called?

Density is the amount of mass in a given volume.The symbol most often used for density is p (the lower case Greek letter rho). Mathematically, density is calculated as mass divided by volume (p = m/V).

Why does density and pressure change when you enter the earth?

Density does not change because density is measured by Mass/Volume. So whether you're on earth, on the moon or floating in space, your density remains the same. Pressure, on the other hand, changes because it is defined as force per unit area (Force/Area). Your weight is the force here. As you approach the earth, the value of g increases, and so does the value of force.