Vocabulary
According to the scientific method, what happens after a physicist tests their hypothesis and collects/analyzes data?
Conclusion
Measurements can be classified as precise, but not accurate.
T or F
True
What is the area of physics that studies motion and its causes?
a. mechanics b. thermodynamics
c. quantum mechanics d. waves
What is "mechanics."
The radius of Earth is 6 370 000 m. How many significant figures does this number have?
3
What is 5 hours 45. min expressed in seconds?
put answer in scientific notation
don't worry about sig figs
2.07 x 104 seconds
What type of data do we want to collect in physics?
quantitative or qualitative
Quantitative
Variable the scientist introduces and is placed on the x-axis in graphs
What is the independent variable
A physicist is studying specifically the speed of neutrons during a nuclear reaction. Identify the area of physics that this involves.
a. quantum physics b. relativity
c. thermodynamics d. mechanics
What is b. relativity
Calculate the following, and express the answer in scientific notation with the correct number of significant figures: 10.5 x 8.8 x 3.14
What is "2.9 x 10^2"
What is 47 g expressed in micrograms?
put answer in scientific notation
4.7 X 107
Which requires more evidence: theory or scientific law
2.3x104 x 6.5x107 =
make sure answer is in correct sci notation with correct sig fig
1.5x1012
What is the area of physics that deals with microscopic/submicroscopic particles?
a.) relativity
b.) optics
c.) quantum mechanics
d.) waves
Quantum mechanics
Calculate the following, and express the answer in scientific notation with the correct number of significant figures: (0.82 + 0.042)(4.4 x 10^3)
What is "3.8 x 10^3"
What is 15.1 m/s expressed in kilometer per hour?
54.36 km/hr = 54.4 km/hr
Three values were obtained for the mass of a metal bar: 8.83 g; 8.84 g; 8.82 g. The known mass is 10.68 g. The values are (accurate or precise)
What is "precise"
If a space shuttle can travel 17,000 miles per hour, how many meters per second does it travel?
(1 mile = 1.609 km)
correct sig fig
7.6 x 103 m/s
How many significant figures does 0.050200 mg have?
What is "5"
hitting the bullseye on a dartboard is (accuracy or precision)
accuracy
1,234,000. has how many sig figs?
7
The area of physics involved in testing whether the alloy can affect a magnetic compass needle.
a. thermodynamics
b. relativity
c. optics
d. electromagnetism
What is "electromagnetism."
The speed of light is known to be 2.99792458 x 10^8 m/s. Express this value with 3 significant figures.
What is "3.00 x 10^8"
If the change in position (distance) x (with units of m) is related to velocity v (with units of m/s) in the equation x = Av, the constant A has which dimension?
What is "second"