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3 years ago

13

Are ultrasound waves high energy waves or low energy waves?

1 answer:

german3 years ago

3 0

And think they are high energy waves. But I'm not sure

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The power of a purely resistive lead is always positive although the current and voltage are sometimes negative. explain

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A farsighted boy has a near point at 2.3 m and requires eyeglasses to correct his vision. Corrective lenses are available in inc

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Answer:

P = 3.5 D

Explanation:

As we know that convex lens is to be used to make the near point of eye to be correct

So we will have

$\frac{1}{d_i} + \frac{1}{d_o} = \frac{1}{f}$

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$d_o = 25 cm$

now plug in all values into the formula

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