How might Sam describe how a dating relationship and a marriage differ? What types of behavior in a dating relationship will enhance the dignity, respect, and responsibility relating to a marriage? Give specific examples.

not too sure thinking it will always be directed towards the centre of the earth. could be wrong not sure

explanation:

v=uf/(u-f)

= 5.-10/(5+10) convex lens has negative focal length

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.