Minor Physics Internal CO1

1. What is the standard unit of length in the SI system?

• Meter

• Centimeter

• Kilometer

• Mile

What is the purpose of converting units?

• To simplify calculations

• To ensure consistency

• To increase accuracy

• All of the above

What is the purpose of significant figures?

• To indicate precision

• To indicate accuracy

• To simplify calculations

• To increase accuracy

How many significant figures are in the number 0.0456?

• 2

• 3

• 4

• 5

What is an estimate?

• A precise calculation

• A rough approximation

• A mathematical formula

• A physical law

What is the purpose of orders of magnitude?

• To simplify calculations

• To estimate quantities

• To increase accuracy

• To indicate precision

What is the difference between precision and accuracy?

• Precision is accuracy

• Precision is repeatability

• Accuracy is closeness to true value

• Both B and C

How do you convert units?

• Multiply by a conversion factor

• Divide by a conversion factor

• Add or subtract a conversion factor

• Both A and B

Convert 5000 meters to kilometers.

• 5 km

• 50 km

• 500 km

• 0.5 km

Round off 460.278 grams to two significant figures.

A) 460 g

B) 456 g

C) 4.6 x 10^2 g

D) 0.46 x 10^3 g

• 460 g

• All are correct

• 4.6 x 10^2

• 0.46 x 10^3