Awide light source creates a shadow with two parts. from which part can the light source be partiallly seen?
a) the light source can be seen from the umbra
b) the light source can be seen from the penumbra
c) the light source can be seen from both parts of the shadow.
d) the light source can be seen from neither part o the shadow.

Ahypothrticalax type of ceramic material is known to have a density of 2.10 g/cm3 and a unit cell of cubic symmetry with a cell edge length of 0.57 nm. the atomic weights of the a and x elements are 28.5and 30.0 g/mol, respectively. on the basis of this information, which of the following crystal structures is (are) possible for this material: sodium chloride, cesium chloride, or zinc blende

How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.