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| Question 1 |
| What is the 50% of 2.5 × 10−4? |
| A. | 1.25 × 10−2 | B. | 2.25 × 10−4 |
| C. | 1.25 × 10−4 | D. | 5.0 × 10−2 |
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| Question 2 |
| 0.0001 × 3.23 × 10−2 = ________ |
| A. | 3.23 × 10+2 | B. | 3.23 × 10+4 |
| C. | 323.0 × 10−6 | D. | 3.23 × 10−6 |
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| Question 3 |
| A 2.3 × 10−3 cm long nano fiber is divided into 100 parts. What is the length of a divided part? |
| A. | 2.3 × 10−2 cm | B. | 2.3 × 10−5 cm |
| C. | 2.3 × 10−6 cm | D. | 0.23 × 10−5 cm |
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| Question 4 |
| Old semiconductor technology was capable of producing 90 × 10−9 m wide lines. Latest technology has further reduced the width by 50%. How wide lines can be produced now? |
| A. | 45 × 10−9 m | B. | 90 × 10−9 m |
| C. | 2.5 × 10−9 m | D. | 35 × 10−9 m |
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| Question 5 |
| Light takes about 5.4 × 10−6 seconds to travel one mile in a vacuum. How long will it take the light to travel only one twentieth of a mile? |
| A. | 5.4 × 10−7 seconds | B. | 2.7 × 10−7 seconds |
| C. | 2.7 × 10−6 seconds | D. | 2.7 × 10−5 seconds |
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| Question 6 |
| 4.5 × 10−7 × 2.0 × 10+4 = __________ |
| A. | 3.5 × 10−11 | B. | 3.5 × 10−3 |
| C. | 9.0 × 10−3 | D. | 9.0 × 10−28 |
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| Question 7 |
| What is two seventh of 2.8 × 10−6? |
| A. | 4.0 × 10−7 | B. | 0.8 × 10−6 |
| C. | 8.0 × 10−7 | D. | 8.0 × 10−6 |
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| Question 8 |
A strobe light flashes for one microsecond and then pauses for one microsecond in one flash cycle. Calculate time to complete 10,000 cycles?
one microsecond = 10−6 second,
one millisecond = 10−3 second. |
| A. | 20 millisecond | B. | 1 millisecond |
| C. | 100 microsecond | D. | 20 microsecond |
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| Question 9 |
| What is 6% of 3.9 × 10−4? |
| A. | 2.34 × 10−3 | B. | 2.34 × 10−7 |
| C. | 2.34 × 10−5 | D. | 2.34 × 10−6 |
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| Question 10 |
| What is two-third of 60% of 5.7 × 10−8? |
| A. | 1.14 × 10−9 | B. | 3.42 × 10−8 |
| C. | 2.28 × 10−9 | D. | 2.28 × 10−8 |
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