Resonant Note

A resonant note is a clear, hollow sound produced when a body surface is percussed over an air-containing structure, most commonly the normal lung. During clinical percussion, a tapped surface transmits vibrations through underlying tissues, and the volume and density of air, fluid, or solid material determine the resulting acoustic quality; air-filled lung typically produces resonance, whereas fluid or tissue replacement produces a duller note. Clinicians use these differences in respiratory examination to assess lung aeration and identify possible changes such as consolidation, pleural fluid, or excess air. The finding complements auscultation and other diagnostic assessments.

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Education

JoVE Business - Accounting

Notes Receivable

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2025

Firms may opt for a more formal arrangement than simple invoicing in business transactions where immediate payment is impossible. Notes receivable serve this role by providing a written promise from the debtor to pay a specified amount at a future date. These instruments offer greater legal enforceability and often accrue interest, making them a more secure form of credit extension.Key Features and Financial ImplicationsUnlike accounts receivable, which are informal and usually short-term,...

Notes Payable

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2025

Short-term borrowing through notes payable is a common tool for businesses managing liquidity or covering temporary cash shortfalls. These instruments serve as legally binding agreements that outline the repayment of borrowed funds along with interest over a defined period. The formal structure of notes payable distinguishes them from informal credit arrangements, such as accounts payable.When a note matures one year or less from the balance sheet date, it is categorized as a current liability.

Recognizing Notes Receivable

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2025

Businesses often extend credit to customers, but informal promises to pay may expose sellers to greater financial risk. To mitigate this, companies may formalize such transactions through notes receivable. These legal instruments specify a borrower’s obligation to repay a fixed sum, often with interest, by a defined future date.Formal Credit Agreements in AccountingUnlike accounts receivable, which are usually non-interest-bearing and short-term, notes receivable involve a written contract that...

Resonance

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2020

The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N-O and N=O bonds. If nitrite ions do indeed contain a single and a double bond, the two bond lengths are expected to be different. A double bond between two atoms is shorter (and stronger) than a single bond between the same two atoms. However, experiments show that both N–O bonds in NO2− have the same strength and length, and are identical in all other...

Research

JoVE Journal - Engineering

Fabrication and Characterization of Superconducting Resonators

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Cited by 3 •

2016

Superconducting microwave resonators are of interest for detection of light, quantum computing applications and materials characterization. This work presents a detailed procedure for fabrication and characterization of superconducting microwave resonator scattering parameters.

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