The Positrons near the Galactic Center Can Be Detected Because

question 3

Multiple Choice

The positrons near the galactic center can be detected because they annihilate with electrons and emit gamma rays. Two gamma rays are produced in such a situation to conserve both energy and momentum. Suppose the positron and electron, each with energy mc², convert all of this energy into two identical gamma-ray photons. What will be the wavelength of these photons? The mass of an electron is 9.1 * 10^-31 kg.

• A) 1.5 * 10^-2 nm
• B) 2.4 * 10^-3 nm
• C) 3.9* 10^-4 nm
• D) 7.9 *10^-5 nm

Assess the financial performance using flexible budgeting.

Distinguish between spending and activity variances.

Evaluate employee wages and salaries management in budgeting.

Grasp the concept of planning budget and its importance in financial forecasting.

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Definitions:

Fast Mapping

The way in which children quickly form an idea of the meaning of an unfamiliar word they hear in a familiar and highly structured social interaction.

Babbling

Early stage of language development where infants produce sounds or syllables repeatedly without specific meaning.

Babbling

An early stage in language acquisition where infants produce sounds or syllables repetitively, which precedes the development of spoken words.

Scaffolding

A teaching method that involves providing learners with temporary support until they can perform tasks independently.