Social Science
What did the United states do to the Treaty of Versailles after World War 1
they did not ratify it and returned to isolationism
What was a central art movement during the Roaring 20's
Art Deco , DaDa , Harlem Renaissance
When you rub a plastic comb on a wool sweater, how do the electrons react and which particles are actually moving?
The comb becomes negatively charged, because electrons are the particles that move.
A ride-share app charges a $4 base fee plus $0.60 per mile.
whats the linear equation that gives the total cost C for m miles.
C = 0.6m + 4
Jamal has only one hour before bed. He can use that hour to study, watch TV, or play video games.
What basic economic concept does this situation illustrate?
Scarcity.
He has limited time and unlimited wants
what was the 18th amendment and 19th amendment
What did Guy Pene du Bois's "Woman on Sofa" express
modern female identity with fashion being a huge identity marker
An oxygen atom has 8 protons in its nucleus. Under normal conditions, it has the same number of electrons orbiting the nucleus.
If the atom loses 2 electrons, what is its net charge?
Losing 2 electrons leaves: +8 and –6 → net charge = +2.
A plant is 15 cm tall and grows at a constant rate of 2 cm per week.
Write an equation for the plant’s height H after t weeks and find the height after 6 weeks.
H = 15 + 2t
H(6) = 15 + 2(6) = 27 cm
If Sofia spends her last $5 on a sandwich, she can’t use that same $5 to buy a drink.
What concept explains why she must give something up?
Trade-offs
choosing one option means giving up another.
What year did World War 1 end?
1918
What's James Van Der Zee known for?
took pictures of upper class African American people with a focus on their luxurious life styles
Two electrons repel each other because they have the same charge.
If their distance apart doubles, by what factor does the electric force change?
Coulomb’s law is an inverse square law.
Doubling distance = force becomes 1/4 as strong.
A club sells bracelets. They spend $80 on supplies and make each bracelet for $3.
They sell each bracelet for $7.
How many bracelets must they sell to break even?
Revenue = 7x
Cost = 80 + 3x
7x = 80 + 3x
4x = 80
x = 20 bracelets
A friend invites you to a free concert. You don’t have to pay for a ticket, but you would’ve been working and earning $20 during that time.
What is the opportunity cost of going to the concert?
The $20 you lose from not working.
Opportunity cost = value of your next best alternative.
What were the Sedition and Espionage Rights
Made it illegal to criticize the government or the war
What were some of the main characteristics of Art Deco
luxurious materials like chrome, wood and velvet and geometric shapes
A student rubs two plastic rods with cloth. Rod A ends up negatively charged. Rod B ends up positively charged.
When the two rods are brought near each other, what happens?
They attract, because opposite charges pull toward each other.
A hot-air balloon is descending at a constant rate. At 2 minutes, it is at 900 feet.
At 5 minutes, it is at 780 feet.
What is the linear equation for its height h(t) and its height at 10 minutes.
Slope = (780 – 900) / (5 – 2) = –120 / 3 = –40 ft/min
Using (2, 900):
h(t) = –40(t – 2) + 900 = –40t + 980
At t = 10:
h(10) = –40(10) + 980 = 580 ft
Lena chooses to volunteer at a charity event instead of going to work at Mcdonalds because helping others matters more to her.
According to economics, is this a rational choice?
rationality means choosing the option with the greatest personal benefit (not just money)
who were the two most influential presidents during the roaring twenties
Calvin Coolidge and Herbert Hoover
Name One artist from the roaring twenties
Examples: Thomas Hart Benton, Archibald Motley Jr, James Van Der
A balloon becomes charged after being rubbed on someone’s hair.
Which type of particle moved during the rubbing
Electrons moved.
Train A leaves a station traveling east at 55 mph.
Train B leaves the same station one hour later traveling east at 70 mph.
How long after Train B leaves will it catch up to Train A?
Train A has a 1-hour head start. Distance = 55 miles.
Let t = hours Train B travels.
Train B distance: 70t
Train A distance after B leaves: 55(t + 1)
Set equal:
70t = 55(t + 1)
70t = 55t + 55
15t = 55
t = 11/3 hours
A student wants to know why the price of pizza at local shops increased this month.
Is this a microeconomic or macroeconomic question?
Microeconomics