What are physical properties? a. the difference between a substance and a mixture b. the difference between a heterogeneous and a homogeneous mixture c. characteristics used to tell the difference between matter d. properties that can change the chemical composition of matter (apex)

We have a colorless transparent liquid. it looks like water. we seperated it into a solid and a liquid by evaporration and condention was this a chemichal or a physical seperation a. chemical seperation b. physical seperation

What object a collides with object b and bounces back its final momentum is?

The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.