A bullet of mass of 50g is moving with the velocity of 200km/h .calculate the kinetic energy of the bullet .

Physics

2 answers:

pashok25 [27]3 years ago

8 0

Answer:

is 10³

Explanation:

cuz the formula of KE is 1/2mv²

covert 50g to kg first then plug in the formula

1/2 × 0.05 × 200 = 10³ J

Evgen [1.6K]3 years ago

6 0

Not sure if this it completely right but here’s what I got: 77.16050617284 J

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<u>Answer :</u>

(a) d = 0.25 m

(b) d = 0.5 m

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It is given that,

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(1) Perfectly destructive interference occurs when the path difference is half integral multiple of wavelength i.e.

$d=\dfrac{\lambda}{2}$ ........(1)

Velocity of sound wave is given by :

$v=f\times \lambda$

$d=\dfrac{v}{2f}$

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$d=0.25\ m$

Hence, when the speakers are in phase the smallest distance between the speakers for which the interference of the sound waves is perfectly destructive is 0.25 m.

(2) For constructive interference, the path difference is integral multiple of wavelengths i.e.

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