Which statement correctly describes the nucleus of the atom? the nucleus of the atom contains the electrons.the nucleus of the atom is mostly empty space.the nucleus of the atom surrounds the center of the atom.the nucleus of the atom contains most of the mass of an atom.

Option (D) is correct.

Explanation:

According to the Rutherford's atom model, almost entire mass of the atoms consists in the small central core. This small central core is called the nucleus of the atom.

Nucleus contains protons and neutrons.

Mass of one proton is 1.67 x 10^-27 Kg

Mass of one neutron is almost same as that of mass of one proton.

Mass of an electron is 9.1 x 10^-31 Kg.

Mass of electron is much lesser than the mass of proton and neutron, so almost entire mass of the atom consists in the nucleus.

false

explanation:

boats, things on boats luggage are way more heavy then water.

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.