What is the total number of atoms in the formula below? NH3 one two three four

Acceleration equation physics

Which of the following best describes a completely elastic collision? The kinetic energy (K) of the system before the collision equals K after. The potential energy (U) of the system before the collision equals U after.

As an emergency vehicle approaches Bob and moves away from Jill, how does the actual frequency of the siren change? A) As an emergency vehicle approaches Bob the frequency increases.

A rocket burns fuel to produce blank the force that moves the rocket forward

A student had a sample of pure water, and added an unknown substance to it. the student noticed that the hydroxide ion concentration in the solution increased as the substance was added. what is true about this newly formed solution?

Give an example of ionic and covalent bond, and explain and make an example for each.

Which of these is the best reason for proper nutrition? A. To ensure that you will be skinny B. To protect yourself against certain diseases C. To improve your intelligence D. To ensure that you will get good grades

And object has a mass of 15g it has a volume of 7.5ml. find the density of the object.

I need this answered quickly. is the branch of science for naming and classifying organisms based on their natural relationships? A-physics B-taxonomy C-genetics D-biology

For a fixed amount of gas, if the absolute temperature of the gas is doubled, what happens to the pressure of the gas?