Motion
Acceleration and Force
Energy
Bonding and Balancing
Atoms
Miscellaneous
Energy 2
100
Mark biked 10 miles north and 5 miles east. Finally he biked 10 miles south.
What was is displacement?
5 miles East
(Remember, opposite directions subtract)
100
What is the distance of the first 3 seconds?
d = 90 m
(Remember: Use the S = d/t formula.
t = 3 seconds, v = 30 m/s)
100
What is the kinetic energy of a 3 kg ball moving at 12 m/s?
KE = 216 J
(Remember to square the velocity first!)
100
Describe an ionic bond.
It is a bond between a metal and a nonmetal.
The bond drawing uses arrows and creates ions with ion charges.
100
Draw the Lewis dot structure of Nitrogen (N).
100
The density of wood is 0.6 g/mL. Does wood float or sink? (Water's density is 1 g/mL)
It floats because the density is less than water.
100
What three things affect the amount of electrical resistance in an object?
Length, Temperature, Thickness
200
On Friday, it took Kevin 2 hours to drive to the beach.
On Sunday, it took Kevin 1 hour to drive to the beach.
How did Kevin's speed change on Sunday?
It took Kevin less time to go to the same destination, therefore he was driving faster (more speed!).
200
An object is pushed with a force of 13 N to an acceleration of 5 m/s/s. What is the mass of the object?
m = 2.6
200
If the temperature of an object increases, what happens to the kinetic energy of the particles in the object?
The kinetic energy increases.
200
Describe a covalent bond.
It is a bond between nonmetals and nonmetals.
The bond drawing includes circles and dashes.200
What is the atomic mass of Oxygen (O)?
16
200
Convert 27 degrees Fahrenheit to Celsius.
-2.78 degrees Celsius
200
If the resistance is decreased in a circuit, how will the current be affected?
The current will increase.
(Remember they affect each other inversely/opposite of each other)
300
Katie walked 300 feet in 10 minutes. How fast did she walk?
S = 30 ft/min
300
A rollercoaster slows from 30 m/s to a stop in 10 seconds. How fast did the rollercoaster accelerate?
a = -3m/s/s
(Remember: a stop = 0 m/s)
300
What two factors affect the amount of potential energy in an object?
Height and mass
300
Balance the following chemical reaction:
____ N2 + ____ H2 --> ____ NH3
1 N2 + 3 H2 --> 2 NH3
300
What is the atomic number of Calcium (Ca)?
20
300
Convert 15 degrees Celsius to Kelvin.
288 K
300
If the voltage of electricity in a circuit is decreased, how will the current be affected?
The current will decrease.
(Voltage and current are proportional, they are affected in the same direction)
400
If a bus drives at 72 mi/hr for 200 miles, how long is the ride?
t = 2.78 hr
400
What 2 effects does friction create on an object?
1. Slows the object down
2. Creates thermal energy
400
What is the potential energy of a 25 kg cat sitting 4meters off the ground?
PE = 980 J
(Remember: g = 9.8 m/s/s)
400
What type of reaction is the following chemical equation?
1 N2 + 3 H2 --> 2 NH3
Addition
400
What is the ion charge of Bromine (Br)?
-1
(Bromine has 7 valence electrons. It needs 1 more to get to 8 and because it "takes" the electron, it becomes negative)
400
Put the following in order from bottom to top of a graduated cylinder:
Copper = 8.9 g/mL
Wood = 0.6 g/mL
Water = 1 g/mL
Wood on top, then water, then Copper at the bottom.
(Remember: the smaller the density, the more an object floats.)
400
Which of the following is true about fission?
a. It happens naturally on Earth
b. It splits atoms
c. It is used currently in society.d. all of the above.
D. all of the above!
It splits atoms, happens on Earth, and is used currently with uranium and plutonium in society.
500
What is the velocity of the following graph?
v = 2 m/s
(Remember, this is technically a SLOPE problem! Speed = slope!)
500
If the acceleration of an object increases (and the mass stays the same), what would happen to the net force on the object?
The net force would increase.
(Consider the formula F=ma, if a goes up, then F goes up)
500
What two factors affect the amount of kinetic energy an object has?
Speed(velocity) and mass
500
Is Hydrogen a metal or a nonmetal?
Nonmetal
(Remember, it's the special snowflake!)500
Draw the Bohr model of Sulfur (S)?
500
Convert 34 degrees Celsius to Fahrenheit.
93.2 degrees F
500
Where does Fusion happen?
In stars like our Sun