Physics Mid term questions
C1. A room in a house has a floor area of 120 ft2. Which of the following is most likely the approximate volume of the room?
b. 30 m3
C2. When SI units are plugged into an equation, it is found that the units balance. Which of the following can we expect to be true for this equation?
a. The equation will be dimensionally correct.
C3. How long has it been that scientists have accepted that the nucleus of the atom consists of neutrons and protons? Think of your answers in terms of order of magnitude.
b. about a century
C4. Consider the sine of any angle between 30° and 40°. If the angle were doubled, what would happen to the sine of the angle?
c. It would increase but be less than double.
C5. There are other ways of expressing uncertainty besides significant figures. For example, suppose a quantity is known to have a value between 20.4 and 20.0 and our best estimate of the value is midrange at 20.2. We could write the number as 20.2 +/- 0.2 and say that the number has a 1% uncertainty. We would also say it has 3 significant figures. If we square a number with 1% uncertainty (i.e., 2 parts in about 200) and 3 significant figures, what results?
b. A number with 2% uncertainty and 3 significant figures.
1. Since 1983 the standard meter has been defined in terms of which of the following?
d. the distance light travels in a certain fraction of a second
2. Since 1967 the standard definition for the second has been based on which of the following?
a. characteristic frequency of the cesium-133 atom
3. In mechanics, physicists use three basic quantities to derive additional quantities. Mass is one of the three quantities. What are the other two?
c. length and time
4. The prefixes which are abbreviated p, n, and G represent which of the following?
c. 10-12, 10-9, and 109
5. The ratio M/m of the prefixes M and m has what value?
c. 109
6. One year is about ________ seconds while one day is exactly ________ seconds.
b. 30 m3
C2. When SI units are plugged into an equation, it is found that the units balance. Which of the following can we expect to be true for this equation?
a. The equation will be dimensionally correct.
C3. How long has it been that scientists have accepted that the nucleus of the atom consists of neutrons and protons? Think of your answers in terms of order of magnitude.
b. about a century
C4. Consider the sine of any angle between 30° and 40°. If the angle were doubled, what would happen to the sine of the angle?
c. It would increase but be less than double.
C5. There are other ways of expressing uncertainty besides significant figures. For example, suppose a quantity is known to have a value between 20.4 and 20.0 and our best estimate of the value is midrange at 20.2. We could write the number as 20.2 +/- 0.2 and say that the number has a 1% uncertainty. We would also say it has 3 significant figures. If we square a number with 1% uncertainty (i.e., 2 parts in about 200) and 3 significant figures, what results?
b. A number with 2% uncertainty and 3 significant figures.
1. Since 1983 the standard meter has been defined in terms of which of the following?
d. the distance light travels in a certain fraction of a second
2. Since 1967 the standard definition for the second has been based on which of the following?
a. characteristic frequency of the cesium-133 atom
3. In mechanics, physicists use three basic quantities to derive additional quantities. Mass is one of the three quantities. What are the other two?
c. length and time
4. The prefixes which are abbreviated p, n, and G represent which of the following?
c. 10-12, 10-9, and 109
5. The ratio M/m of the prefixes M and m has what value?
c. 109
6. One year is about ________ seconds while one day is exactly ________ seconds.