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.

Achemistry student weighs out 0.306 g of citric acid (h3c6h5o7), a triprotic acid, into a 250 ml volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with 0.1000 m naoh solution. calculate the volume of naoh solution the student will need to add to reach the final equivalence point. be sure your answer has the correct number of significant digits.

Awoman's basketball has a circumference between 28.5 and 29.0 inches and a maximum weight of 20 ounces (two significant figures). what are these specifications in units of centimeters and grams?

What is happening when the water inside a kettle heats up and begins to boil