When did the first particles of matter originate

A capacitor consists of two square plates, 6.2 cm on a side, separated by a 2.0 mm air gap. How much energy would be stored in the capacitor if a mica dielectric is placed between the plates? Assume the mica is 2.

The density of liquid mercury is 13.69 g/cm^3. How many atoms of mercury are in a 15.0 cm^3 sample? Use "E" for "x10" and use sig figs.

Karen has discovered a new organism in the Amazon Rainforest. It moves by itself, is a consumer, and its cells do not have a cell wall. In what Kingdom would this newly discovered organism belong? A) Amazon B) Animalia C) Fungi D) Plantae

During a humanitarian trip to an underdeveloped country, a medical student is assessing a 6-year-old male who has a protuberant abdomen, dry hair, and wrinkled skin.

What are signs that a chemical reaction has occured

Is Free Energy positive or negative in boiling water?

What is one element in the same family as oxygen?

Why does a ball rolling along a level sidewalk slow down and then stop

Common properties of sodium, calcium, iron, and gold

The closeness of a measurement to its actual value is a measure of its A. usefulness. B. reproducibility. C. precision. D. accuracy.