The number L = 8.0 x 10^4 cm can be expressed as:
Correct answer: B. L = 0.8 km
- A. L = 8.0 x 10^6 mm
- B. L = 0.8 km
- C. L = 0.8 x 10^2 m
- D. L = 8.0 x 10^3 m
Explanation
B is the answer as converting 80000 cm to meters would give us 800 m as we divide 80000 cm by 100 cm/m. Converting meters to kilometers, we must divide 800 m by 1000 m/km to get 0.8 km
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Measurements
Physical quantities are expressed with SI base and derived units, while measurement limits are described through accuracy, precision, absolute and percentage error, and significant figures. Dimensional analysis checks equations, derives relationships and detects inconsistent units, but it cannot determine numerical constants or distinguish quantities with identical dimensions.
Practise Measurements
262 free Measurements MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 11 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Measurements questions
Which of the following is not a base unit in the SI system?
In SI units, the unit of Candela is used for the measurement of:
How many significant figures are there in 0.4793?
The base units of Young's Modulus are:
Which of the following is dimensionless quantity?
Which of the following is not a S.I. base quantity: