MCQ
Which one of the following is dimensionless physical quantity?
- ✓Angle
- BStress
- CForce gradient
- DVelocity gradient
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.......... $\mathrm{gm} / \mathrm{cm}^{3}$

If heat flows through them from $x = 0$ to $x = 2L$ at a steady rate and conductivities of the metals are $K_{cu}$ and $K_{steel}$ $(K_{cu} > K_{steel}),$ then the temperature varies as (convection and radiation are negligible)