Physics

# A student gave a formula for the coefficient of thermal conductivity $K = \frac { d } { A \left( \theta _ { 1 } - \theta _ { 2 } \right) t }$ where $d$ is the thickness, $A$ is the area, $\theta _ { 1 }$ and $\theta _ { 2 }$ are the temperatures and $t$ is the time. The dimensional formula of the missing term is

$M L ^ { 2 } T ^ { - 2 }$

You're just one step away

Single Correct Medium Published on 18th 08, 2020
Questions 244531
Subjects 8
Chapters 125
Enrolled Students 203

#### Realted Questions

Q1 Subjective Medium
The rate of flow of a liquid through a capillary tube of length $L$ and radius $r$ under a pressure difference $p$ is given by the poiseuille's formula $V = \pi \,p\,{r^4}/8\eta L$. Determine the dimensions of the coefficient of viscosity $\eta$ of the liquid.

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q2 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

Q3 Subjective Medium
Check the correctness of the equation $F_C=\dfrac{mv^2}{r}$, where the terms have their.

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q4 Single Correct Medium
The resistance of a metal is given by $R = V/I$, where $V$ is potential difference and $I$ is the current. In a circuit, the potential difference across resistance is $V = (8 \pm 0.5)V$ and current in resistance, $I = (4 \pm 0.2)\mathring{A}$. What is the value of resistance with its percentage error?
• A. $(2 \pm5.6\%)$
• B. $(2 \pm0.7\%)$
• C. $(2 \pm35\%)$
• D. $(2 \pm11.25\%)$

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q5 Single Correct Medium
Subtract $2.5 \times {10}^{4}$ from $3.9 \times {10}^{5}$ and give the answer to correct number of significant figures.
• A.  $3.6\times 10^6$
• B.  $3.6\times 10^5$
• C.  $36\times 10^5$
• D.  $36\times 10^6$

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020