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Rainbow [258]
3 years ago
15

On the pH scale, pure water has a pH of

Physics
2 answers:
abruzzese [7]3 years ago
6 0

Answer:

7

Explanation:

Daniel [21]3 years ago
5 0

Answer:

7

Explanation:

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andrezito [222]

Explanation:

The machine whose efficiency is 100% is known as perfect machine .This machine is not possible in real life because every machine is affected by the overcoming friction due to which is efficiency become less than hundred percent .

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2 years ago
What are some words that have changed meaning due to technological advances in the last 20 years?
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8 0
2 years ago
A body oscillates with simple harmonic motion along the x axis. Its displacement varies with time according to the equation x =
frutty [35]

Answer:

θ = (7π / 3) rad

Explanation:

given,

displacement of simple harmonic motion along x-axis

equation is given as

                   x = 5 sin (π t + π/3 )

general equation of simple harmonic motion

                   x = A sin θ

           θ is the phase angle

      θ = π t + π/3

at   t = 2 s

      \theta =\pi \times 2 +\dfrac{\pi}{3}

      \theta =\dfrac{7\pi}{3}\ rad

Phase of the motion at t =2 s is θ = (7π / 3) rad

7 0
3 years ago
Noah drops a rock with a density of 1.73 g/cm3 into a pond. Will the rock float or sink? Explain your answer.
Rainbow [258]
The answer to that is the rock will sink 
8 0
3 years ago
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Jenny loves puffed rice cereal. As she is pouring the cereal, two little
Ede4ka [16]

Answer:

4.9 x 10-23 N

Explanation:

I took the test

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3 years ago
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