The Variation in the Pressure of Helium Gas, Measured from Its

question 8

Multiple Choice

The variation in the pressure of helium gas, measured from its equilibrium value, is given by ΔP = 2.9 × 10−⁵ cos (6.20x − 3 000t) where x and t have units m and s, and ΔP is measured in N/m². Determine the wavelength (in m) of the wave.

• A) 1 500
• B) 0.32
• C) 477
• D) 1.01
• E) 0.50

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Definitions:

Ecological Community

A group of interacting species living in a common location, influencing each other's distribution, abundance, and evolutionary adaptation.

Nitrogen Fixing Bacteria

Microorganisms capable of converting atmospheric nitrogen into forms usable by plants.

Rhizobium

A genus of bacteria that forms symbiotic relationships with legumes, fixing nitrogen from the air into a form the plant can absorb and use.

Mutualism

A symbiotic interaction between two different species where each benefits from the relationship.