Which of these force is reponsible for attracting the opposite poles of two bar magments towards each other

Which statement about subatomic particles is NOT true? A. Protons and neutrons have almost the same mass. B. Protons and electrons have opposite charges. C. Unlike protons and electrons, neutrons have no charge. D.

Give an example of a change of state that happens in everday life

Energy conversion means reducing energy use True or false

Blood serum in healthy adults normally contains approximately 3.2 mg/mL of sodium ions (Na+) and approximately 3.5 mg/mL of chloride ions (Cl-). How many milliliters of blood serum would be needed to obtain 3.

In the unit 2 lab, what combination produced a brown bubbly liquid that looks like root-beer? (Select the two parts of the combination) Chalk NaCl KCl Baking Soda Sugar Vinegar Water Citric Acid Vegetable Oil NaOH

What mass of potassium chlorate would contain 40grams of oxygen?

Identical forces act for the same length of time on two different masses. The change in momentum of the smaller mass is A) smaller than the change in momentum of the larger mass, but not zero. B) zero.

How many nuclei of 238 92 U 92 238 U remain in a rock if the activity registers 290 decays per second? (Note that the half life of Uranium-238 is 4.468x109 years)

A base can neutralize an acid. true or false

Hydrochloric acid (12.0 ml of 0.233 m) is added to 296.0 ml of 0.0579 m ba (oh) 2 solution. what is the concentration of the excess h + or oh - ions left in this solution?