A sound wave with a frequency of 1,700 Hz is traveling through air at a speed of 340 m/s. What is the wavelength of this sound wave?
a. 0.2 m
b. 5.0 m
c. 2,040 m
d. 57,800 m

How does an observation about an object differ from an inference about that object

Could we see a galaxy that is 20 billion light-years away?

Find an expression for the electric field e⃗ at the center of the semicircle. hint: a small piece of arc length δs spans a small angle δθ=δs /r, where r is the radius. express your answer in terms of the variables q, l, unit vectors i^, j^, and appropriate constants.