Physics

When we express the velocity of light, $$30,00,00,000/ ms^{-1}$$, in standard form up to three significant figures, it's value is:


ANSWER

$$3.00\times { 10 }^{ 8 }\ { ms }^{ -1 }$$


SOLUTION
Since all the zeros on the right of last non zero digit in the decimal part are significant.
$$\Rightarrow 300000000=3.00\times 10^{8}\ m/s$$ 
View Answers

You're just one step away

Create your Digital Resume For FREE on your name's sub domain "yourname.wcard.io". Register Here!


Single Correct Medium Published on 18th 08, 2020
Next Question
Questions 244531
Subjects 8
Chapters 125
Enrolled Students 203
Enroll Now For FREE

Realted Questions

Q1 Single Correct Hard
Which of the following does not have the same dimension?
  • A. Electric flux, Electric field, Electric dipole moment
  • B. Pressure, stress, Youngs modulus
  • C. Electromotive force, Potential difference, Electric voltage
  • D. Heat, Potential energy, Work done

Asked in: Physics - Units and Measurement


1 Verified Answer | Published on 18th 08, 2020

View Answer
Q2 Single Correct Medium
Find the value of following on the basis of significant figure rule:
$$1.00\times 2.88$$ is equal to:
  • A. $$2.88$$
  • B. $$2.880$$
  • C. $$2.9$$
  • D. None of these

Asked in: Physics - Units and Measurement


1 Verified Answer | Published on 18th 08, 2020

View Answer
Q3 Single Correct Medium
Lithium reacts with water to produce hydrogen gas and lithium hydroxide. What (approx.) volume of hydrogen collected over water at 22$$^oC$$ and 750 mm $$Hg$$ pressure by the reaction of 0.208 g of $$Li$$?
$$\left[ { VP }_{ { H }_{ 2 }O }\ =\ 19.8\ mm\ Hg \right]$$
  • A. 360 mL
  • B. 375 mL
  • C. 735 mL
  • D. 55 mL

Asked in: Physics - Units and Measurement


1 Verified Answer | Published on 18th 08, 2020

View Answer
Q4 Single Correct Medium
Available capacity(s) of standard measuring flask is / are :
  • A. 50 ml only
  • B. 100 ml only
  • C. 200 ml only
  • D. all of these

Asked in: Physics - Units and Measurement


1 Verified Answer | Published on 18th 08, 2020

View Answer
Q5 Single Correct Medium
Light years is the unit of:
  • A. time
  • B. length
  • C. mass
  • D. none of these

Asked in: Physics - Units and Measurement


1 Verified Answer | Published on 18th 08, 2020

View Answer