Each dot represents a star in the H-R diagram. We can see that stars do not appear randomly on the plot but appear to be grouped in four main regions. Stars in group C are called supergiants. A red supergiant such as Betelgeuse is so large that it would extend beyond the orbit of Jupiter if it replaced the Sun in our solar system. What else can we infer about supergiants from the H-R diagram?

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.

k2s for potassium sulphide