Which two factors are used to calculate the kinetic energy of an object? gravity and velocity
velocity and mass
mass and volume
volume and height

0.09 moles of sodium sulfate in 12 ml of solution

Mercury metal is poured into a graduated cylinder that holds exactly 22.5 ml the mercury used to fill the cylinder mass in 306.0 g from this information calculate the density of mercury

Sum of brother and sisters age is 26. four times the brothers age is subtracted from three times the sisters age, the difference is 8. what are the ages of the brother and sister?