Lesson 1: Units and Conversions Flashcards
What are the SI units for length or distance in all physics equations?
Meters (m)
What are the SI units for time in all physics equations?
Seconds (s)
What are the SI units for mass in all physics equations?
Kilograms (kg)
How many centimeters are in a meter?
There are 100 centimeters (cm) in a meter (m).
How many grams are in a kilogram?
There are 1,000 grams (g) in a kilogram (kg).
How many micrograms (ug) are there in a gram?
There are 10^6 micrograms (ug) in a gram (g).
How many micrograms (ug) are there in a kilogram (kg)?
There are 10^9 micrograms (ug) in a kilogram (kg).
How many nanoseconds (ns) are there in a second (s)?
There are 10^9 nanoseconds (ns) in a second (s).
How many milliseconds (ms) are there in a second (s)?
There are 10^3 milliseconds (ms) in a second (s).
How many meters (m) are there in a kilometer (km)?
There are 1,000 meters (m) in a kilometer (km).
You are given a temperature in degrees Fahrenheit (degrees F). Is this the correct unit? If not, what units should it be in?
No, you need to convert it to degrees Celsius (degrees C). Kelvin (K) is also fine as long as the equation calls for a change in temperature.
You are given a temperature in Kelvin (K). Is this the correct unit? If not, what units should it be in?
Kelvin (K) is fine as long as the equation calls for a change in temperature.
You are given a distance in feet (ft). Is this the correct unit? If not, what units should it be in?
No, you need to convert feet (ft) to meters (m).
You are given a distance in miles (mi). Is this the correct unit? If not, what units should it be in?
No, you need to convert miles (mi) to meters (m).
You are given a length in centimeters (cm). Is this the correct unit? If not, what units should it be in?
No, you need to convert centimeters (cm) to meters (m).
You are given a length in kilometers (km). Is this the correct unit? If not, what units should it be in?
No, you need to convert kilometers (km) to meters (m).
You are given a length in meters (m). Is this the correct unit? If not, what units should it be in?
Yes, meters (m) are the correct units for distance or length.
You are given time in minutes (min). Is this the correct unit? If not, what units should it be in?
No, you need to convert minutes (min) to seconds (s).
You are given time in hours (hr). Is this the correct unit? If not, what units should it be in?
No, you need to convert hours (hr) to seconds (s).
You are given time in days. Is this the correct unit? If not, what units should it be in?
No, you need to convert days to seconds (s).
You are given velocity in miles per hour (mph). Is this the correct unit? If not, what units should it be in?
No, you need to convert miles per hour (mph) to meters per second (m/s).
In a problem, you read 10 miles. Is this is a displacement, velocity, or acceleration?
Displacement, which has units of length (convert to meters).
In a problem, you read 30 mph. Is this a displacement, velocity, or acceleration?
Velocity, which needs to be converted to m/s (meters per second).
In a problem, you read 14 m/s. Is this a displacement, velocity, or acceleration?
Velocity, in the correct units (m/s, meters per second).
In a problem, you read 3.5 m/s^2. Is this a displacement, velocity, or acceleration?
Acceleration, in the correct units of m/s^2 (meters per second squared).
You are given an area in terms of square feet (ft^2). Are these the correct units? If not, how do you convert to the correct units?
You need to be in units of square meters (m^2).
Convert ft^2 to m^2:
(x ft^2) * (1 m / 3.28 ft)^2
You are given a volume in terms of cubic feet (ft^3). Are these the correct units? If not, how do you convert to the correct units?
You need to be in units of cubic meters (m^3).
Convert ft^3 to m^3:
(x ft^3) * (1 m / 3.28 ft)^3
