The two aircrafts are skidded for 14.9 s.
To find the answer, we need to know about the Newton's equation of motion.
<h3>What is the Newton's equation that relates velocity, distance, acceleration and time?</h3>
As per Newton's equation of motion
- V²-U²= 2aS
- V= U+at
- V= final velocity, U = initial velocity, S = distance, a= acceleration, t= time
<h3>What's the acceleration of the aircrafts that skidded from 35 m/s after the collision for 112.1 m before achieving 15 m/s?</h3>
- Here, U = 35 m/s, V = 15m/s, S= 112.1 m
- So, 15²- 35²= 2a×112.1= 224.2a
=> a= -1000/224.2= -4.5 m/s²
<h3>What's the time taken to stop if these aircrafts are de-accelerated by 4.5 m/s² from 35m/s?</h3>
- Here, U = 35 m/s, V=15 m/s a= -4.5 m/s²
- 35= 15+(-4.5)t
=> t= 20/4.5 = 4.4 s
Thus, we can conclude that the two aircrafts are skidded for 4.4 s.
Learn more about the Newton's equation of motion here:
brainly.com/question/25545050
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I believe the answer is:
~D. Very dusty irregular galaxy.
Hope this helps!!!
Answer:
decibels (dB)
Explanation:
The sound intensity level is a quantity derived from the sound intensity.
The intensity of a wave is defined as the power of the source of the wave divided by the area through which the power of the wave is spread, mathematically:
where
P is the power of the source
is the surface area over which the wave spreads (assuming that the wave propagates in all directions, it corresponds to the surface area of a sphere of radius 
, where r is the distance between the source of the wave and the observer)
For sound waves, the intensity is often expressed using another unit, called decibel (dB), defined as follows:
where
is the sound intensity level in decibels
I is the intensity of the sound wave
is the threshold intensity of a sound that a person can normally hear.
Answer:
E = h ν energy of electromagnetic particle
(b) has the greater frequency
Answer:
i dont know
Explanation:
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