Physics

The unit of length is


SOLUTION

Let unit of length, time and mass be $$L_1,T_1$$ and $$M_1$$ respectively.

According to question

$$9.8\;LT^{-2}=3\;L_1T^{-2}$$

$$\displaystyle\frac{1}{2}(272.1)(448)^2ML^2T^{-2}=100\;M_1L_1^2T_1^{-2}$$

$$(272.1)(448)\;MLT^{-1}=10M_1L_1T_1$$

by solving above equation $$L_1=153.6\:L$$

$$\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;=153.6\,m$$

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!


Subjective Medium Published on 18th 08, 2020
Next Question
Questions 244531
Subjects 8
Chapters 125
Enrolled Students 199
Enroll Now For FREE

Realted Questions

Q1 Single Correct Medium
Dimensions of coefficient of viscosity are
  • A. $$ML^2T^{-2}$$
  • B. $$ML^2T^{-1}$$
  • C. $$ML^{-1}T^{-1}$$
  • D. $$MLT$$

Asked in: Physics - Units and Measurement


1 Verified Answer | Published on 18th 08, 2020

View Answer
Q2 Single Correct Medium
The units of three physical quantities $$x,y$$ and $$z$$ are $$gcm^2\;s^{-5},gs^{-1}$$ and $$cms^{-2}$$ respectively. The relation between $$x,y$$ and $$z$$ is
  • A. $$\;z=x^2y$$
  • B. $$\;y^2=xz$$
  • C. $$\;x=yz^2$$
  • D. $$\;x=y^2z$$

Asked in: Physics - Units and Measurement


1 Verified Answer | Published on 18th 08, 2020

View Answer
Q3 Single Correct Medium
A person was weighing $$102.1\  kg$$ last week and gained $$0.28 \ kg$$ this week. His weight as of now is correctly expressed as :
  • A. $$102.38\  kg$$
  • B. $$102.3\  kg$$
  • C. $$102.4\  kg$$
  • D. $$102\  kg$$

Asked in: Physics - Units and Measurement


1 Verified Answer | Published on 18th 08, 2020

View Answer
Q4 Single Correct Medium
The power of lens is $$P=\dfrac{1}{f}$$, where '$$f$$' is focal length of the lens. The dimensions of power of lens is:
  • A. $$[LT^{-2}]$$
  • B. $$[M^0L^{-1}T^0]$$
  • C. $$[M^0L^0T^0]$$
  • D. None of these

Asked in: Physics - Units and Measurement


1 Verified Answer | Published on 18th 08, 2020

View Answer
Q5 Single Correct Medium
Which of the following is not a derived quantity?
  • A. The floor area of a room
  • B. The height of a room
  • C. The volume of air in a room
  • D. The weight of air in a room

Asked in: Physics - Units and Measurement


1 Verified Answer | Published on 18th 08, 2020

View Answer