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Vladimir [108]
3 years ago
11

An atom emission of light with a specific amount of energy confirms that ?

Physics
1 answer:
marusya05 [52]3 years ago
8 0

The correct answer is B, electrons emit and absorb energy based on their position around the nucleus.

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If an element has 2 valence electrons, how many dots will be in the elements dot diagram?
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Well since we're doing the Lewis dot diagram do you know which element on the table that it is? 
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Which statement about the reaction is correct?
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I think D am not pretty show

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A 20 MHz carrier is frequency modulated by a sinusoidal signal such that the maximum frequency deviation is 100kHz. Calculate th
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3/122 The collar has a mass of 2 kg and is attached to the light spring, which has a stiffness of 30 N/m and an unstretched leng
gavmur [86]

Explanation:

According to the law of conservation of energy, work done by the force is as follows.

        W_{F} = F Cos (30^{o}) \times 1.5

                   = 64.95 J

Now, gain in potential energy is as follows.

                P.E = mgh

                      = 2 \times 9.8 \times 1.5

                      = 29.4 J

Gain in potential energy will be as follows.

           = \frac{1}{2}kx^{2}_{2} - \frac{1}{2}kx^{2}_{1}

           = \frac{1}{2} \times 30 N/m \times [(2.5 - 1.5)^{2} - (2 - 1.5)^{2}]

           = 11.25

As,

          W_{f} = u_{1} + u_{2} + \frac{1}{2}mv^{2}

          \frac{1}{2}mv^{2} = W_{f} - u_{1} - u_{2}  

                   = 64.95 J - 29.4 - 11.25

                   = 24.3

              v^{2} = \frac{24.3 \times 2}{2}

                  v = 4.92 m/s

Therefore, we can conclude that relative velocity at point B is 4.92 m/s.  

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Explain good experimental procedure
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Cleaning your area and wearing safety gear
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