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
1. 62dB+ 15dB=77dB
Or
2. 68dB +5dB =73dB.
Then the public mode signal hearing must be at least 77dB.
The potential energy of a swing is greatest at the top of the swing. (Point A).
Answer:
Explanation:
if t=3.6s and initial velocity, v0, is -5m/s
if t=3.6s and the initial displacement, s0, is -8m:
The answer is imperial units
Answer:
when it interacts with other electrons without changing its speed
Explanation:
without changing its speed
