Two musicians are playing the same instruments. the first one emits the sound with correct wavelength 58 cm while the second one is off, and the wavelength is 5 mm longer.
a) what is the frequency of the beats when they play together?
b) by how much does the second musician need to change her instrument’s wavelength so that thefrequency of the beats is reduced to 1 hz?

Researchers determine that the biodiversity in a woodland region is declining. they identify two major threats to the region's biodiversity, a method to address each threat, and the expected outcome of each method. this information is shown in the table. a) reforestation would not benefit many species because most forest species live on the ground. b) reforestation would take the longest time to be effective because trees take several years to grow. c) biological augmentation would benefit only a few species because is is typically not very effective. d) biological augmentation would take less time to ve effective because it targets the majority of prey species.

Light from a sodium lamp passes through a diffraction grating that has 1000 slits per millimeter. the interference pattern is viewed on a screen 1.000 m behind the grating. the first (m = 1) two bright yellow fringes that are visible are 0.7288 m and 0.7300 m from the central maximum. what are the wavelengths of these two fringes?

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.