Which can occur in a physical change? the mass can increase. the particles can arrange in different ways. the mass can decrease. the atoms can bond to different atoms.

One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. you see that the patch of light seems to be a circular diffraction pattern. it appears that the central maximum is about 1 cm across and you estimate that the distance from the window shade to the wall is about 3 m. what is (a) the average wavelength of sunlight? (b) the diameter of the pinhole?

Describe the function of the endomembrane system? what organelles are involved?

Which type of basaltic lava flow has a fairly smooth