Which of the following is considered a contact force

The potential energy of a 25 kg bicycle resting at the top of a 3 m high hill is what?

What is water quality

What unit would you use to describe the amount of water in a bathtub

Three mixtures are prepared from three very narrow molar mass distribution polystyrene samples with molar masses of 10,000, 30,000, and 100,000 g/mol as indicated below: a. Equal numbers of molecules of each sample b. Equal masses of each sample c.

Question 1. Count Sergei Lvovich Levitsky invented which of the following? A) Collodion processB) Digital imaging C) Dry plates. D) Bellows camera. Question 2. What substance was the first photograph made from? A) Bitumen B) Silver. C) Lemon juice.

Which is true about dissolving a polar substance in water? A) the solvent particles are all nonpolar molecules B) the solute particles are carried into the solution C) the solute particles have no attraction for the solvent molecules D) the solute

Which societal problem can be solved, in part, by scientists identifying areas of high biodiversity? A. reducing the amount of pollution B. finding affordable housing C. protecting the environment D. providing access to clean water

Brianna wanted to compare the densities of two different solids of the same size 6cm3 (same volume) to see which one was more dense. Solid A had a mass of 2 grams and Solid B had a mass of 0.5 grams.

Which type of bond is present within a water molecule

Every oxygen atom has 8 electrons. what can you learn from the electron configuration of oxygen