When you stretch a spring 20 cm past its natural length, it exerts a force of 8 N. What is the spring constant of this spring? A. 1.5 N/cm
B. 0.4 N/cm
C. 25 N/cm
D. 160 N/cm

The geological theory that states that pieces of earth's lithosphere are in constant slow motion is the theory of plate tectonics.

The best answer i can think of is b

Answer: 1.4 seconds which is the third optionexplanation: current is defined as the flow of charge per timetherefore, the equation that relates current, charge and time can be expressed as follows: i = δq / δtwhere: i is the current given = 1.8 ampereδq is the charge given = 2.5 coulombδt is the time required for the flow of the given charges to give the 1.8 ampere.substitute with the givens in the above equation to get the time as follows: 1.8 = 2.5 / δtδt = 2.5 / 1.8 = 1.38888 which is approximately 1.4 secondshope this was !

The density of the block of iron is lees than the density of mercury but the density of the block of iron is greater than the density of water