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emmainna [20.7K]
3 years ago
12

What is recertification​

Physics
2 answers:
mr Goodwill [35]3 years ago
6 0
Process of being certified again
tamaranim1 [39]3 years ago
3 0
Recertification is the act or process of certifying or being certified again
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Sort the balloons based on the kinds of charges they carry.
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first one is negative

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Photons with the highest energy have the longest period
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3 years ago
What is the wavelength of an earthquake wave if it has a speed of 4 km/s and a frequency of 7 Hz?
damaskus [11]

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7 0
4 years ago
In a pool game, the cue ball, which has an initial speed of 3.0 m/s, make an elastic collision with the eight ball, which is ini
zhenek [66]

Explanation:

Given

initial speed(u)=3 m/s

mass of each ball is m

Let the cue ball is moving in x direction initially

In elastic collision Energy and momentum is conserved

Let u be the initial velocity and v_1 , v_2 be the final velocity of 8 ball and cue ball respectively

\frac{mu^2}{2}+0=\frac{mv^2_1}{2}+\frac{mv^2_2}{2}

The angle after which cue ball is deflected is given by

\theta _1=90-40=50^{\circ}

Conserving momentum in x direction

mu=mv_1cos40+mv_2cos50

3=v_1cos40+v_2cos50

Along Y axis

0+0=v_1sin40-v_2sin50

v_1sin40=v_2sin50

substitute the value of v_1

we get v_2=1.912 m/s

v_1=2.27 m/s

5 0
3 years ago
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