Which of the following effects can be caused purely by differences in density? Seperation of farromagnetic materials from non-ferromagnetic materials
Carbon dioxide gas sinking to the floor
Seperation of phases in a centrifuge
Warm water rising to the surface of a lake
O A helium filled balloon rising toward the ceiling
Immiscible liquids stacking on top of each other in a glass
Seperation using a filter
Seperation of liquids during distillation

neither accurate nor precise.

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

hope this ! : )

i think the answer is a and b

i wish you luck

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.