Explain why the feet of camels and wadding birds have the shapes that they have.

When an object is heated it contracts. a. true b. false

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

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?