Physics

# Which of the following is used as SI prefix:

Mega

Hecto

Tera

##### SOLUTION
Mega, Hecto and Tera are used as SI prefix. Mega is used for $10^{6}$, Hecto for $10^2$ and Tera for $10^{12}$.

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Multiple Correct Medium Published on 18th 08, 2020
Questions 244531
Subjects 8
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#### Realted Questions

Q1 Assertion & Reason Medium
##### ASSERTION

A number 2.746 rounded off to three significant figures is 2.75, while the number 2.743 would be 2.74.

##### REASON

In rounding off the uncertain digits, the preceding digit is raised by 1 if the insignificant digit to be dropped is more than 5 and is left unchanged if ; the latter is less than 5.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

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1 Verified Answer | Published on 18th 08, 2020

Q2 Subjective Medium
A  unit of area often used in measuring land areas is the hectare, defined as $10^{4}m^{2}$. AN open pit coal mine consumes $75$ hectare of land, down to a depth of $26\ m$, each year. What volume of earth, in cubic kilometers, is removed in this time?

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Q3 Single Correct Medium
The radius of a sphere is $(2.6 \pm 0.1)$ cm. The percentage error in its volume is
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• B. $3 \times \dfrac{0.1}{2.6} \times 100%$
• C. $\dfrac{{8.49}}{{73.6}} \times 100$
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1 Verified Answer | Published on 18th 08, 2020

Q4 Subjective Medium
Two clocks are being tested against a standard clock located in a national laboratory. At 12:00:00 noon bv the standard clock, the readings of the two clocks are :
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Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

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The order of magnitude of 0.00701 is:
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Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020