Which is a way that the model of the atom became stronger through new experiments? New technology allowed scientists to show that the atom is indivisible.
It took new data to show that positive charge is not spread throughout an atom.
By deflecting alpha particles, Rutherford first observed the neutron.
The neutron could not be detected until Cathode–Ray Tubes were invented.

grav forces affect all objects magnetic forces affect magnetic objects and electric currents

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.

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.