Answer the following statement(s) true (T) or false (F)

1. The frequencies of the normal modes of a string that is free at both ends are the same as those of a string that is fixed at both ends


1. TRUE

Physics & Space Science

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The Balmer lines correspond to wavelengths in the ________ part of the spectrum of a(n) ________ atom.

A. X-ray; helium B. ultraviolet; helium C. visible; hydrogen D. infrared; hydrogen

Physics & Space Science

The laws of refraction and reflection are the same for sound as for light. The speed of sound in air is 340 m/s and in water it is 1510 m/s. If a sound wave approaches a plane water surface at an angle of incidence of 12.0°, what is the angle of refraction?

What will be an ideal response?

Physics & Space Science

An electric current through a tungsten filament maintains its temperature at 2800 K

Assume the tungsten filament behaves as an ideal radiator at that temperature. Near what wavelength does the filament emit the greatest power? (? = 5.67 × 10-8 W/m2 ? K4, Wien displacement law constant is 2.9 × 10-3 m ? K) A) 1200 nm B) 1600 nm C) 1800 nm D) 1000 nm E) 1400 nm

Physics & Space Science

Which of these are metric units?

a. grams b. pounds c. seconds d. kilometers e. square miles

Physics & Space Science