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Why are Smoke Detectors Radioactive? And How do Smoke Detectors Work?

16,745 views

Branch Education

Video Language:

  • English

Caption Language:

  • {{captionLanguage | language_name}} ({{captionLanguage}})

Accent:

  • English (US)

Speech Time:

99%
  • 18:53 / 18:59

Speech Rate:

  • 138 wpm - Conversational

Category:

  • Education

Tags :

Intro:

Video Vocabulary

important

/imˈpôrtnt/

adjective

Having power or authority.

ejected

/ēˈjekt/

verb

force something out violently.

ionizing

/ˈīəˌnīz/

verb

convert atom, molecule, or substance into ion or ions.

microchip

/ˈmīkrōˌCHip/

noun verb

tiny wafer of semiconducting material used to make integrated circuit. implant microchip under skin of domestic animal as means of identification.

discuss

/dəˈskəs/

verb

talk about something with person or people.

speaker

/ˈspēkər/

noun

Electronic device for making or broadcasting sound.

numbers

/ˈnəmbər/

noun other verb

arithmetical value expressed by word, symbol, or figure. Particular songs or dances performed during shows. To claim to be part of a larger group, series, set.

another

/əˈnəT͟Hər/

adjective determiner pronoun

One more, but not this. One more added. One more (thing).

especially

/iˈspeSHəlē/

adverb

used to single out one person or thing over all others.

purchased

/ˈpərCHəs/

verb

buy.

extremely

/ikˈstrēmlē/

adverb

to very great degree.

sponsored

/ˈspänsərd/

adjective verb

Helped to succeed/happen by being given money. To help someone succeed by giving them money.

dangerous

/ˈdānj(ə)rəs/

adjective

able or likely to cause harm or injury.

outside
adjective adverb noun preposition

situated on or near outside. situated beyond boundaries of place. external side or surface. Beyond the limits or edges of some place, thing.

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