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Valentin [98]
3 years ago
8

Guys, i need help with my physics assignment. i dont need help with all of the questions just some. i didn't post the assignment

here since brainly wont let me post multiple pictures. if theres a way i can send it to someone for help, that would be great.
​
Physics
1 answer:
Vlada [557]3 years ago
5 0

Answer:

you can send it one by one I guess

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A room that has an average ambient sound pressure level of 62 dBA and a maximum sound pressure level lasting more than a minute
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Answer:

Explanation:

A fire alarm notification appliance is an active fire protection component of a fire alarm system. The primary function of the notification appliance is to alert persons at risk.

If want the audible public mode signal to be hear clearly then, we need to have a sound level that is at least 15dB above the average ambient sound level or 5dB above the maximum sound level of at least 1minute

In this case the,

The average ambient sound level is 62dB,

And the maximum sound level is 68dB

Then, the public mode signal should be at least

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3 years ago
A car rolls backward from -2 to -10 m/s in 4 seconds. what is the acceleration. PLEASE HELP WILL GIVE BRAINLIEST
pashok25 [27]

\bf \underline{Given : }

  • Initial velocity,u = -2 m/s

  • Final velocity,v = -10 m/s

  • Time taken, t = 4 seconds

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Find the acceleration ( a ) .

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We know that,

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\implies \sf \: Acceleration =  \dfrac{ - 10 - ( - 2)}{4}

\implies\sf \: Acceleration =  \dfrac{ - 10 + 2}{4}

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