What experimental evidence led to the development of this atomic model from the one before it?
Scientists have changed the model of the atom as they
have gathered new evidence. One of the atomic models
is shown below.
O A few of the positive particles aimed at a gold foil
seemed to bounce back.
O The colors of light emitted from heated atoms had
very specific energies.
O Experiments with water vapor showed that elements
combine in specific proportions.
O Cathode rays were bent in the same way whenever a
magnet was brought near them.

falling water hydro = water .. spectcular places these plants are

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.

b. a lightning bug, plug of grass, and a worm