Friction is a force that slows or stops motion. Friction is the resistance to motion created by two objects rubbing against each other (the sled and the snow, for instance). Even air causes friction. Friction forces is your answer.
Answer:
a) Gold = $1,380; Silver = $1,020
b) Gold = $1,300; Silver = $980
Explanation:
a) At first, with Qg = 60 and Qs = 270, the equilibrium prices for gold and silver are found by solving the following linear system:

Equilibrium price of gold is $1,380 and the price of silver is $1,020.
b) If the supply of gold increases to 120, since the goods are substitutes, there will be an increase in overall supply and the equilibrium price of gold and silver will decrease as follows:

Equilibrium price of gold is $1,300 and the price of silver is $980.
Answer:
Specialization is a method of production whereby an entity focuses on the production of a limited scope of goods to gain a greater degree of efficiency. Many countries, for example, specialize in producing the goods and services that are native to their part of the world, and they trade them for other goods and services.
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Answer:
Which potential biological food safety hazard does smoking in food storage and prep areas cause?
Biological food safety hazards are enormous, food contamination on storage food materials can lead to food borne diseases as a result of contamination caused by micro-organisms ranges from bacteria, parasites among others.
Smoking could leave residue on food materials on storage, hence; increases the moisture content which enhances micro-organism growth and enables the food spoilage.
Explanation:
Answer:
The law of decreasing marginal utility states that the actual utility obtained from carrying out some specific activity decreases as you perform that activity more often. E.g. you are very thirsty and decide to drink a glass of Coke. The first glass will yield a very high number of utils. If you are still thirsty, you might drink a second glass, but this time the second glass will yield a lower amount of utils. If you keep drinking more Coke, eventually you will be full and will not even enjoy drinking it.
The opposite happens with the marginal cost of carrying out an activity. For example, you like to bike outdoors. Biking outdoors one day per week will cost you X amount (including actual costs of biking plus opportunity costs). But if you decide to do it 2 times per week, your opportunity costs will increase. If you decide to do it 3 or more times per week, you better be good enough to become a professional or have a very tolerant boss. Opportunity costs of biking outdoors more days per week will keep increasing.