General Physics 1 - Summative Assessment 1.1

A micro scale measures the mass of a certain bacteria to be 15 nanogram. What is this measure when expressed in unit grams?

• 1.5 x 10^–10 g

• 1.5 x 10^–8 g

• 1.5 x 10⁸ g

• 1.5 x 10¹⁰ g

An OTG flash drive stores a data up to 64 Gigabytes. What is this measure in unit bytes?

• 6.4 x 10^–10 bytes

• 6.4 x 10^–8 bytes

• 6.4 x 10⁸ bytes

• 6.4 x 10¹⁰ bytes

The size of the smallest dust particle is approximately 1 x 10^–4 m, which is its equivalent when written in a decimal form?

• 0.001 m

• 0.0001 m

• 0.00001 m

• 0.000001 m

A dust particle approximately weighs 0.00001 g, which is its equivalent in decimal form?

• 1 x 10⁵ g

• 1 x 10⁴ g

• 1 x 10^–5 g

• 1 x 10^–4 g

Four different people weigh a standard mass of 5.00 g on the same balance. Each person obtains a reading of exactly 9.70 g for the mass of the standard. Which of the following implies the results in which the balance was used?

• precise but not accurate

• both accurate and precise

• accurate but not precise

• neither accurate nor precise

Which of the following situations shows low accuracy and high precision?

• A basketball player strikes the ball in different portions of the rim and doesn’t make a basket.

• A player doesn’t make any basket but always strikes the same portion of the rim.

• A player makes a basket even though he strikes at different portions of the rim.

• A player whose free throws always make the basket the same way.

Which of the following situations shows high accuracy and low precision?

• A basketball player strikes the ball in different portions of the rim and doesn’t make a basket.

• A player doesn’t make any basket but always strikes the same portion of the rim.

• A player makes a basket even though he strikes at different portions of the rim.

• A player whose free throws always make the basket the same way.

The following may reduce the effect of random errors EXCEPT

• calibrating instruments correctly

• perfecting experimental technique

• always taking measurements under standard conditions

• repeating the measurement numerous times and averaging the result

If you do not keep your line of sight directly over the length measurement, how will your measurement most likely be affected?

• Your measurement will have fewer significant figures.

• Your measurement will suffer from instrumental error.

• Your measurement will be less accurate.

• Your measurement will be less precise.

Which of the following CANNOT be a source of a measurement error?

• uncalibrated instrument

• mechanical defects

• incorrect observation

• measured objects