Chemistry
Motion
Newton's Laws and Forces
Momentum/Impulse & Energy
Universe
Electricity & Magnetism
100
The nucleus of an atom is made up of these two subatomic particles.
Protons and neutrons
100
This term describes the rate at which an object's velocity changes over time, often measured in m/s^2.
Acceleration
100
An astronaut has a mass of 75 kg on the earth. The acceleration due to gravity on the moon is 1.63 m/s/s.
a) What is her mass on the moon?
b) What is her weight on the moon?
a) 75 kg b) 122 N
100
This is the product of an object's mass and its velocity.
momentu
Momentum
100
List at least 3 things that were happening or characteristics of the universe in the first second after The Big Bang.
very hot, very dense, violent, speck of pure energy, expanding rapidly
100
These are the three components required to create a simple functioning electric circuit.
A power source (battery), a conductor (wire), and a load (lightbulb).
200
Balance the following chemical equation.
Na2SO4 + CaCl2 ---> CaSO4 + NaCl
Na2SO4 + CaCl2 ---> CaSO4 + 2NaCl
200
A car starts with a velocity of 0 m/s. 10 seconds later the car is moving to the right at 12 m/s. What is the car's acceleration?
Acceleration = (final velocity - initial velocity) / time
Acceleration = (10 m/s - 0 m/s) / 10 s
Acceleration = 1.0 (m/s/s)
200
Describe Newton's First Law with
a) velocity b) forces c) acceleration
Describe Newton's Second Law with
d) velocity e) forces f) acceleration
a) velocity is constant or 0 m/s
b) forces are balanced
c) acc=0 m/s/s
d) velocity is changing (increasing or decreasing)
e) forces are not balanced
f) acceleration is not 0m/s/s (but can be constant)
200
Calculate the GRAVITATIONAL POTENTIAL ENERGY of a 100kg ball that is at rest on the ground.
Calculate the KINETIC ENERGY of a 100kg ball that is traveling 100m/s.
PE = mass x gravity x height =
(100kg)(9.8m/s/s)(0m) = 0 J
KE = 1/2 (mass)(speed)2 =
1/2(100kg)(100m/s)2 = 500,000 J
200
This is the baby picture of the universe that scientists use to calculate that the universe is 13.8 billion years old.
Cosmic Microwave Background Radiation
Bonus: What color was it when it first was released to the universe?
What "color" is it today?
200
Electromagnetic induction (Faraday's Law) is achieved when a magnet is moved through a coil of wire. What is made when this happens? 
Electrical Current
300
What does the atomic mass of the atom represent?
What does the atomic number of the atom represent?
The charge of all atoms on the periodic table is always this.
The total number of protons and neutrons in the nucleus of the atom.
The total number of protons in the nucleus and electrons.
Neutral because there are an equal number of positively charged protons and negatively charged electrons. The neutrons are neutral so they don't affect the charge of the atom.
300
This law states that an object at rest stays at rest unless acted upon by an unbalanced force.
Newton's Second Law
300
What is the MASS of a man with a WEIGHT of 852.6N?
mass = weight / g
mass = 852.6 N / 9.8 m/s/s
mass = 87 kg
300
This concept explains why increasing the time of an impact (like landing on a pillow) decreases the force felt.
Impulse
300
Explain what Hubble's Law tells us about the universe.
The universe is expanding and galaxies further away are moving away faster.
300
This device consists of a coil of wire that acts like a magnet when an electric current passes through it and makes what?
An electromagnet or a solenoid
400
Compare and Ionic bond and a Covalent bond with the following:
400
What is the acceleration of the object?
acceleration = (final velocity - initial velocity) / time
acceleration = (300 m/s - 3 m/s) / 10 s
acceleration = 29.7 m/s/s
400
Calculate the momentum of a 85 kg woman if she is running at 3.6 m/s.
p = mv
p = 85 kg x 3.6 m/s
p = 306 kg m/s
400
Calculate the KINETIC ENERGY of a 16 kg rock rolling with a velocity of 12 m/s.
1152 J
400
What are the differences between a solenoid (right) and a bar magnet (left)?
The solenoid requires an electric current to induce its magnetic field, whereas a permanent magnet does not.
500
Balance the following equation:
Fe + H2O ---> Fe3O4 + H2
3 Fe + 4 H2O ---> Fe3O4 + 4 H2
500
If an astronaut has a mass of 90 kg on Earth, what is their mass on the Moon where gravity is much weaker.
Mass = 90 (kg)
500
If a 2 kg hockey puck moving at 10 m/s collides with another 2 kg hockey puck that is at rest, what is the final momentum of both hockey pucks after they collide?
Conservation of momentum in elastic collisions.
Initial momentum must equal final momentum.
pi = (2kg)(10m/s) + (2kg)(0m/s) = 20 kgm/s
so, pf = 20 kgm/s
500
According to this law, the total momentum of two objects before a collision is equal to the total momentum after the collision.
The Law of Conservation of Momentum
500
This is the current understanding of why the universe is continuing to increase the rate of expansion.
Dark Energy pushing galaxies away from each other.
500
This subatomic particle is the primary carrier of electricity in a metal wire.
An electron
600
What is the atomic number of Iron?
What is the atomic mass of Iron?
How many protons does Iron have?
How many neutrons does Iron have?
How many electron does Iron have?
Atomic number is 26.
Atomic mass is 56.
Iron has 26 protons.
Iron has 30 neutrons.
Iron has 26 electrons.
600
A group of friends is trying to push a 150 kg go-kart. Two people push the kart forward (right) with forces of 120 N and 155 N respectively. However, the wind is blowing against them, creating a leftward air resistance force of 45 N. Additionally, there is a constant friction force of 30 N acting to the left.
Determine the magnitude and direction of the go-kart's acceleration.
Fnet = (120 + 155) - (45 + 30)
Fnet = 275 - 75
Fnet = 200 (N) to the right
a = 200 (N)/150 (kg)
a = 1.33 (m/s2)
600
A 5000 N piano is lifted by a crane with a chain with a force of 6500N.
a. Calculate the unbalanced force acting on the piano.
b. Calculate the piano's mass.
c. Calculate the piano's acceleration.
a. 1500 N Upward
b. 510.20 kg
c. 2.94 m/s/s
600
A small 1,200 kg compact car is traveling East (positive direction) at 25 m/s. Suddenly, it is struck head-on by a large 2,500 kg truck traveling West (negative direction) at 15 m/s. The vehicles lock together upon impact.
Calculate the final velocity of the tangled wreckage.
Total Momentum = (m1 * V + m2 * V)
1200 * 25 = 30,000 (kg*m/s)
25,000 * (-)15 = (-) 37,000 (kg*m/s)
Since they stick together, we add their Momentum
30,000 + (-37,500) = -7,500 kg*m/s
-7,500 = Total mass * Velocity
-7,500 = 3700 (kg) * Velocity
Velocity = (-) 2.3 (m/s)
600
Name 3 of the four evidences for the Big Bang Theory and WHY are they evidence.
e = mc2 (Energy to Matter & Matter to Energy)
Cosmic Microwave Background Radiation
Hubble's Law (Galaxies further away are moving faster than closer galaxies)
Redshift (the further the galaxy or light is from the Milky Way, the larger the redshift)