#1: a concentration in terms of volume/volume is used to describe which of the following types of solutions?

a. solutions with a solid solvent and a solid solute

b. solutions with a liquid solvent and a liquid solute

c. solutions with a solid solute and a liquid solute

d. solutions with a liquid solvent and a solid solute

**i'm not really sure on this one : ( what do you think?

Americium-241 undergoes fission to produce three neutrons per fission event. if a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 1.8 neutrons per fission event, which will be effective at achieving a critical mass? check all that apply. remove a deflective shield surrounding the sample. remove absorbent material mixed in with the sample. compress the sample of americium-241.

Which statement is true regarding the diagram of circle p? the sum of y and z must be 2x. the sum of y and z must be x. the difference of z and y must be 2x. the difference of z and y must be x

Which of the following will cause an increase in the acceleration of an object? increase force decrease force increase mass decrease mass