Title: Pre-Unit Assessment
Course: MNPCC Physics > Section: Introduction to Physics

This assessment is not part of your grade, but rather to help your teacher see where you are starting at with the skills taught in this unit.

Q: Which is the best choice for the measurement of the box depicted here?
- 3.00 cm (Correct!)
- 3.0 cm (That is not precise enough for this ruler.)
- 3.000 cm (That is too precise for this measuring device.)
- 3 cm (That is not precise enough for this ruler.)
A: 3.00 cm
If right: Your answer is correct.
If wrong: Your answer is incorrect.

Q: Which of the following gives the proper SI base unit for each type of measurement:
- Length (m), Mass (kilogram), Time (second), Temperature (Kelvin) (Correct!)
- Length (cm), Mass (gram), Time (second), Temperature (Celsius) (While these are common lab units, they are not the SI base units.)
- Length (in), Mass (pound), Time (second), Temperature (Fahrenheit) (These are the units we commonly use in the United states, but they are not SI units.)
A: Length (m), Mass (kilogram), Time (second), Temperature (Kelvin)
If right: Your answer is correct.
If wrong: Your answer is incorrect.

Q: Which option gives the proper multiplier for each metric prefix?
- 1000 (kilo), 0.01 (centi), 0.001 (milli) (Correct)
- 1000 (milli), 100 (centi), 0.001 (kilo) (Milli and Centi mean smaller than the base unit and Kilo is bigger.)
- 1000 (kilo), 100 (centi), 10 (milli) (Centi is 100 times smaller not bigger, milli is 1000 times smaller.)
- 1 million (milli), 100 (cenit), 0.001 (kilo) (Milli comes from latin and means thousand not million. Also direction of multipliers is backwards.)
A: 1000 (kilo), 0.01 (centi), 0.001 (milli)
If right: Your answer is correct.
If wrong: Your answer is incorrect.

Q: Which of the following correctly displays the proper way to go from 35 cm to m?
- 35 cm * (1 m / 100 cm) (Correct)
- 35 cm * (1 cm / 100 m) (This will give you the correct number, but (1 cm / 100 m) does not equal one and will give the incorrect units.)
- 35 cm * (100 m / 1 cm) (This cancels units correctly, but is not the correct relationship between m and cm.)
- 35 cm * (100 cm / 1 m) (This will not give you the proper unit, you always put the wanted unit over the unit you have.)
A: 35 cm * (1 m / 100 cm)
If right: Your answer is correct.
If wrong: Your answer is incorrect.

Q: How many significant digits are in the number 103000?
- 3 (Correct.)
- 2 (The zero between the 1 and the 3 is significant, there is no way to write the number without it.)
- 6 (The last 3 zeros are not significant, the number can be rewritten as 1.03 * 105)
A: 3
If right: Your answer is correct.
If wrong: Your answer is incorrect.

Q: Which of the following represents the answer to the equation shown below when taking into consideration proper significant digits?

12.267 cm + 0.1 cm =
- 12.4 cm (Correct)
- 12.3 cm (You need to round, not truncate)
- 10 cm (For addition, you use the place of the least precise to determine answer, not the number of digits.)
- 12.367 cm (This is what the calculator would give you, but it is much too precise given the 0.1 cm.)
A: 12.4 cm
If right: Your answer is correct.
If wrong: Your answer is incorrect.

Q: Which of the following represents the answer to the following equation when taking into consideration proper significant digits?

1.0 m / 0.03 s =
- 30 m/s (Correct)
- 33.3 m/s (This has too many significant digits, with multiplication it is the number of digits that matters not the place.)
- 3 m/s (This has the correct number of significant digits, but not the correct magnitude.)
- 33.33 m/s (This is way to precise, your least precise number to start with has one significant digit.)
A: 30 m/s
If right: Your answer is correct.
If wrong: Your answer is incorrect.

Q: A teacher sets out a book that has been properly measured to be 26.34 cm along the spine. Three students made measurements of the same book. Match the teachers comments to the students work.

Student A:  26 cm

Student B: 6.35 cm

Student C: 26.33 cm
- A: Accurate B: Precise C: Precise and Accurate (Correct)
- A: Precise B: Accurate C: Precise and Accurate (You have the terms reversed.)
- A: Accurate B: Precise C: Precise (C is both, you only have to be within the amount of uncertainty to be accurate.)
- A: Precise B: Accurate C: Accurate (You have the terms reversed, and C is both precise and accurate.)
A: A: Accurate B: Precise C: Precise and Accurate
If right: Your answer is correct.
If wrong: Your answer is incorrect.

Q: Which of the following correctly writes the number 206000000 in scientific notation?
- 2.06 * 10^8 (Correct)
- 2.06 * 10^9 (Only count how far you move the decimal, not the total number of digits.)
- 206 * 10^6 (This evaluates to the correct number, but it is not the proper way of doing scientific notation.)
- 2.6 * 10^7 (You can’t change the number, getting rid of that zero changes the number!)
A: 2.06 * 10^8
If right: Your answer is correct.
If wrong: Your answer is incorrect.

Q: Which of the following represents the number 0.0000465 written in proper scientific notation?
- 4.65 * 10^-5 (Correct)
- 4.65 * 10^-4 (Count how many places you move the decimal, not how many zeros there are.)
- 465 * 10^-7 (This would evaluate to the correct number, but it is not the correct form for scientific notation.)
- 4.65 * 10^-7 (Don’t count all the way to the end of the number, only to the first nonzero digit.)
A: 4.65 * 10^-5
If right: Your answer is correct.
If wrong: Your answer is incorrect.