Hooke's Law can be written as H= k. What does the spring constant refer to? How does increasing it affect the amount that the spring can be stretched given the same amount of
force?

Spring constant:
Effect of increasing the spring constant:

think its the third option

c. magnitude and direction

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

i believe the answer is electric potential.

explanation: