Branches
Which branch of physics would most be involved with:
Music
Waves/Vibrations
In an experiment to see how large human error is in timing with a stopwatch, experimenters have events run with a human stopwatch and also with a radar chip and compare the times. What is the independent variable?
timing method
5.6 cm = ____________ km
0.000056 km
How many sigfigs in:
0.0056
2
An objects mass is measured 3 times. The measurements are 3.4g, 3.4g, and 3.5 g. The actual mass is 5.0 g. Are these measurements accurate, precise, both or neither?
Precise (repeatable or many sigfigs), but not accurate
Which branch of physics would most be involved with:
Designing a better lens for sunglasses
Optics
In an experiment to see how far various densities of foam go down when absorbing the force of a falling bowling ball falling from 10m, what would the dependent variable be?
the depth the foam goes down
4,500 mm = _____________m
4.5 m
How many sigfigs in:
5,300
2
hundreth (0.01) of a cm
Which branch of physics would most be involved with:
Cooking supper
Thermodynamics
In an experiment to see what type of glass is best at protecting people from UV light, various types of glass are tested against a certain light source. Determine 3 necessary controlled variables for this experiment.
Thickness of glass
Shape of glass
Distance from light
How the UV is measured
GIVEN: Mega = 106 m and nano = 10-9 m
5 billion nm = _____________Mm
5 x 10-6 Mm
0.000005 MmHow many sigfigs in:
900.0
4
In gases, the greater the pressure the lower the volume. The product of these values is constant. What is the name for the relationship between these variables?
Inverse
Which branch of physics would most be involved with:
Calibrating Clocks of satellites and space shuttles with Earth
Relativity (they move fast and experience different gravity than us, so their time frame of reference is different!
You want to know which fertilizer works the best among Miracle Gro, Scotts, or Manure. Outline an experiment to determine the answer, include all necessary components.
type of fertilizer (IV)
Measurements of some kind, height, fruit size/volume etc. (DV)
Plant type, sunlight, water, amount of fertilizer (CVs)
GIVEN: 1 inch = 2.54 cm
5.6 inches = ____________hm
140,000 hm
1.4 x 105 hm
Answer the following with appropriate units and sigfigs.
3.4 cm + 0.030 m =
6.4 cm OR 0.064 m
In an experiment to find the density of water, a student found it to be 1.3 g/mL. The actual density is exactly 1.0 g/mL. Calculate their percent error.
30% error
Which branch of physics would most be involved with:
Determining the launch angle and thrust needed for a shuttle launch
Mechanics
GIVEN: Speed of Light = 3.0 x 108 m/s
How many km could light travel in a year? Answer in Scientific Notation.
9.5 x 1012 km
Answer the following with appropriate units and sigfigs:
5.332 m x 6.0 m
32 m2
If a student is very imprecise, their measurements for the same item might all be pretty different. If they do enough trials, they could still average to get answers that are pretty accurate but the ____________ _____________ of their data set would be high.
standard deviation