The frequency of the first harmonic of a standing wave on a wire is . The length of the wire and tension in the wire are both doubled.
What is the frequency of the first harmonic as a result?
A f/√2
B f
C √2f
D 2f

The energy of a photon was found to be 3.38 × 10–19 j. planck’s constant is 6.63 × 10–34 j • s. which color of light corresponds to this photon?

Awoman holds a book by placing it between her hands such that she presses at right angles to the front and back covers. the book has a mass of m = 1.8 kg and the coefficient of static friction between her hand and the book is μs = 0.67. no attempt 50% part (a) what is the weight of the book, fgb in newtons?

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?