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Svetach [21]
3 years ago
6

Which evidence best supports the theory that the universe began with a massive explosion?

Physics
2 answers:
RUDIKE [14]3 years ago
8 0
Evidence isn't used to support theories. Theories are attempts to explain evidence. The so-called "big bang theory" is able to explain the origin of the cosmic background radiation.
Ivanshal [37]3 years ago
5 0
I think it's b. But I'm not sure
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A string is 3.00 m long with a mass of 5.00 g. The string is held taut with a tension of 500.00 N applied to the string. A pulse
NISA [10]

Answer:

The time interval is t  =  5.48 *10^{-3} \ s

Explanation:

From the question we are told that

   The length of the string is  l  =  3.00 \ m

    The  mass of the string is m  =  5.00 \ g  =  5.0 *10^{-3}\ kg

     The  tension on the string is  T  =  500 \ N

   

The  velocity of the pulse is mathematically represented as

      v  = \sqrt{ \frac{T}{\mu } }

Where \mu is the linear density which is mathematically evaluated as

       \mu  =  \frac{m}{l}

substituting values

     \mu  =  \frac{5.0 *10^{-3}}{3}

     \mu  = 1.67 *10^{-3} \  kg /m

Thus  

     v = \sqrt{\frac{500}{1.67 *10^{-3}} }

    v = 547.7 m/s

The time taken is evaluated as

    t  =  \frac{d}{v}

substituting values

      t  =  \frac{3}{547.7}

      t  =  5.48 *10^{-3} \ s

5 0
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