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Llana [10]
3 years ago
9

Which of the following waves have the lowest energy?

Physics
2 answers:
Bogdan [553]3 years ago
8 0

Answer:

The answer is radio waves

Hope that helps! :)

borishaifa [10]3 years ago
7 0
The radio waves have a very low frequency so they will always have a very low energy.

Good luck :)
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Answer:

t=750s

Explanation:

The two cars are under an uniform linear motion. So, the distance traveled by them is given by:

\Delta x=vt\\x_f-x_0=vt\\x_f=x_0+vt

x_f is the same for both cars when the second one catches up with the first. If we take as reference point the initial position of the second car, we have:

x_0_1=6km\\x_0_2=0

We have x_f_1=x_f_2. Thus, solving for t:

x_0_1+v_1t=x_0_2+v_2t\\x_0_1=t(v_2-v_1)\\t=\frac{x_0_1}{v_2-v_1}\\t=\frac{6*10^3m}{28\frac{m}{s}-20\frac{m}{s}}\\t=750s

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