In ultrasound the wavelength of the sound is much smaller than in normal sound

a. True
b. False
Indicate whether the statement is true or false


True

Physics & Space Science

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A highway curve of radius 100 m, banked at an angle of 45°, may be negotiated without friction at a speed of

A) 22 m/s. B) 31 m/s. C) 44 m/s. D) 67 m/s.

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Why are massive stars more luminous than low mass stars? That is, why is there a mass-luminosity relation?

What will be an ideal response?

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The figure shows a distance vs. time graph of an object with three distinct regions, I, II, and III

?
The object’s acceleration is zero only in region II.

a.
True

b.
False

Physics & Space Science

The corona and chromosphere are hotter than the photosphere

Indicate whether the statement is true or false

Physics & Space Science