Bandwagon advertising is basically persuading people to join something or buy something because, "everyone else is."
For example: "Vote for Charlie to be the class president! Everyone else is!"
To solve this problem we will apply the two concepts mentioned. To find the constant we will apply Hooke's law, and to find the period we will apply the relationship between the mass and the spring constant. Let us begin,
PART A) For this section we will use Hooke's law. In turn, since the force applied is equivalent to weight, we will use Newton's law for which weight is defined as the product between mass and gravity. This weight is equal to the Spring Force.

Here,
k = Spring constant
= Displacement
F = Force, the same as the Weight (mg)
Then we have that




Therefore the spring constant is 13.23N/m
PART B) To find the period of oscillation, the relationship that allows us to find is given by the following mathematical function,

Here
m = mass
k = Spring constant
Replacing,


Therefore the period of the oscillation is 0.491s
Answer: The correct answer for the fill in the blank is - medium of exchange.
Explanation-
When we use paper money to pay for food, the money is a medium of exchange as we are exchanging our money with their food. So, it plays a role of medium of exchange in purchasing our food.
On the other hand, unit of account is also a feature of money but it only indicates the price of food at which we are purchasing it. Store of value is used when we store our money as a wealth, then it becomes store of value .
Hence, medium of exchange is the correct answer.
The prefix for Bio is life so a biologist studies life of living organisms
The prefix for Geo is earth so it would be the study of earth.
What is in common would be animals and plants
what is different is an Geologist studies only earth Biologist studies everything living. I hope this was helpful and I didn't confuse you.