Measurement
What are SI units?
The international system of units
What determines the precision of a measurement?
How do you find the slope of a linear graph?
The slope of a linear graph is the ratio of the vertical change to the horizontal change.
A water tank has a mass of 3.64 kg when it is empty and a mass of 51.8 kg when it is filled to a certain level. What is the mass of the water in the tank?
48.2 kg
How are base units and derived units related?
Derived units are algebraic combinations of base units.
How does the last digit differ from the other digits in a measurement?
The final digit is estimated.
During a laboratory experiment, the temperature of the gas in a balloon is varied and the volume of the balloon is measured. Identify the independent variable and the dependent variable.
Temperature is the independent variable; volume is the dependent variable.
The length of a room is 16.40 m, its width is 4.5 m, and its height is 3.26 m. What volume does the room enclose?
2.4 × 102 m3
Convert 21 km to meters.
2.1 × 104 m
Rank the following numbers according to the number of significant figures they have, from most to least:
1.234, 0.13, 0.250, 7.603, 0.08.
Specifically indicate any ties.
1.234 = 7.603 > 0.250 > 0.13 > 0.08
The temperature drops linearly from 24°C to 10°C in 12 hours. What is the average temperature change per hour?
1.2°C/h
The sides of a quadrangular plot of land are 132.68 m, 48.3 m, 132.736 m, and 48.37 m. What is the perimeter of the plot?
362.1 m
How many L are in 1000 mL?
1 L
State the number of significant figures in 0.7290 g.
3
When driving, the distance traveled between seeing a stoplight and stepping on the brakes is called the reaction distance. Reaction distance for a given driver and vehicle depends linearly on speed.
Would the graph of reaction distance versus speed have a positive or a negative slope?
Positive. As speed increases, reaction distance increases.
Give your answer to the appropriate number of significant figures:
15.07 kg − 12.0 kg
3.1 kg