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4 years ago

Identify the parts of the electromagnetic spectrum, both visible and invisible.

2 answers:

8 0

The visible light spectrum is a fractional part of the electromagnetic spectrum, which is visible due to our eyes, which are light receptors. Invisible spectrum are things like UV spectrum which falls outside the human visible range.

Kaylis [27]4 years ago

4 0

Radio
Microwave
Infrared (heat)
Visible (visible part)
Ultraviolet
X-ray
Gamma ray

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2 years ago

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4 years ago

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An assault rifle fires an eight-shot burst in 0.40 s. Each bullet has a mass of 7.5 g and a speed of 300 m/s as it leaves the gu

myrzilka [38]

Answer:

The average recoil force on the gun during that 0.40 s burst is 45 N.

Explanation:

Mass of each bullet, m = 7.5 g = 0.0075 kg

Speed of the bullet, v = 300 m/s

Time, t = 0.4 s

The change in momentum of an object is equal to impulse delivered. So,

$F\times t=mv\\\\F=\dfrac{mv}{t}$

For 8 shot burst, average recoil force on the gun is :

$F=\dfrac{8mv}{t}\\\\F=\dfrac{7.5}{1000}\cdot\dfrac{300}{0.4}\cdot8\\\\F=45\ N$

So, the average recoil force on the gun during that 0.40 s burst is 45 N.

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3 years ago