Numbers in Science
Vectors, Scalars, and Units
Motion
Do you know this?
100
1,000,000,000 in scientific notation
1 x 109
100
Velocity is a (vector, scalar, unit)
Vector - has a magnitude (amount) and a direction
100
The difference between the starting and ending points in a path of motion.
Displacement.
100
The units for acceleration.
Distance divided by time squared (usually m/s2)
200
1000 grams = _____ hectograms
1000 grams = 10 hectograms
(King Henry Doesn't Usually Drink Chocolate Milk)
200
The metric unit for length is...
meter.
200
Distance traveled in a certain time.
Speed.
200
Acceleration due to gravity on Earth.
9.8 m/s2
300
Metric unit for volume.
Liter
300
Give an example of a scalar with a unit.
(Multiple answers possible)
25 kilograms
2.3 meters per second
78 centimeters, etc.
300
Tyson walks 3 meters West and then 8 meters East. Tyson's total distance is....
11 meters (displacement is 5 meters)
300
When you add up all the forces acting on an object you are calculating the...
Net force.
400
Angelica measures her temperature 100 times with a thermometer. Each time the thermometer reads exactly 90 degrees Fahrenheit (32 degrees Celsius). Angelica's thermometer is not correct, but it is...
Precise.
400
Displacement is a (vector, scalar, unit)
Scalar
400
A position versus time graph can be used to calculate an object's...
Speed (or velocity if you know the direction)
400
Draw an example of a free body diagram.
(Answers may vary)
500
Estimate the order of magnitude (scientific notation exponent) for the population of the city of Austin.
6 (order of magnitude)
Actual: 1,013,293 people
Scientific Notation: 1 x 106
500
Two forces act on an object. One force is 3 Newtons North, the other force is 4 Newtons East. The resultant force is...
HINT:
5 Newtons North East (32 + 42 = 52)
500
Describe the motion indicated by a straight, horizontal line on a position versus time graph.
Still. No motion. Stopped.
500
The mass of an elephant on Earth is about 2000 - 3000 kilograms. What would be the most likely mass of an elephant on the Moon?
2000 - 3000 kilograms (The elephant's weight on Earth would be about 20,000 - 30,000 Newtons, but on the moon there is 1/6th as much gravity, so the Elephant's weight on the moon would be only about 3,000 - 4,000 Newtons or 700 - 800 pounds)