WBJEE · Physics · Thermal Properties of Matter
The height of a waterfall is \(50 \mathrm{~m}\). If \(g=9.8 \mathrm{~ms}^{-2}\) the difference between the temperature at the top and the bottom of the waterfall is:
- A \(1.17^{\circ} \mathrm{C}\)
- B \(2.17^{\circ} \mathrm{C}\)
- C \(0.117^{\circ} \mathrm{C}\)
- D \(1.43^{\circ} \mathrm{C}\)
Answer & Solution
Correct Answer
(C) \(0.117^{\circ} \mathrm{C}\)
Step-by-step Solution
Detailed explanation
\(\frac{m g h}{J}=m s \Delta t \Rightarrow \Delta t=0.117^{\circ} \mathrm{C}\)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- In Young's experiment for the interference of light, the separation between the slits is \(d\) and the distance of the screen from the slits is \(D\). If \(D\) is increased by \(0.5 \%\) and \(d\) is decreased by \(0.3 \%\) then for the light of a given wavelength, which one of the following is true? "The fringe width.........WBJEE 2019 Medium
- The speed distribution for a sample of \(N\) gas particles is shown below. \(P(v)=0\) for \(v\gt2 v_0\). How many particles have speeds between \(1.2 \mathrm{v}_0\) and \(1.8 \mathrm{v}_0\) ?
WBJEE 2024 Easy - One mole of an ideal monoatomic gas expands along the polytrope \(PV^3=\) constant from \(V_1\) to \(V_2\) at a constant pressure \(P_1\). The temperature during the process is such that molar specific heat \(C_V=\frac{3 R}{2}\). The total heat absorbed during the process can be expressed asWBJEE 2022 Hard
- A modified gravitational potential is given by \(V=-\frac{G M}{r}+\frac{A}{r^2}\). If the constant \(A\) is expressed in terms of gravitational constant (G), mass ( \(M\) ) and velocity of light (c), then from dimensional analysis, \(A\) is,WBJEE 2023 Medium
- An electron of charge \(e\) and mass \(m\) is moving in a circular of radius \(r\) with a uniform angular speed \(\omega .\) Then which of the following statements are correct?WBJEE 2013 Easy
- A force \(\overrightarrow{\mathrm{F}}=a \hat{i}+b \hat{\mathrm{j}}+c \hat{k}\) is acting on a body of mass \(m\). The body was initially at rest at the origin. The co-ordinates of the body after time ' t ' will beWBJEE 2025 Medium
More PYQs from WBJEE
- Consider three vectors \(A=i+j-2 k,\mathbf{B}=\hat{\mathbf{i}}-\hat{\mathbf{j}}+\hat{\mathbf{k}} \text { and } \mathbf{C}=2 \hat{\mathbf{i}}-3 \hat{\mathbf{j}}+4 \hat{\mathbf{k}} . \text { A vector } \mathbf{X} \text { of }\) the form \(\alpha A+\beta B(\alpha\) and \(\beta\) are numbers) is perpendicular to C. The ratio of \(\alpha\) and \(\beta\) isWBJEE 2014 Easy
- Li occupies higher position in the electrochemical series of metals as compared to Cu sinceWBJEE 2012 Easy
- The value of \(\tan \frac{\pi}{5}+2 \tan \frac{2 \pi}{5}+4 \cot \frac{4 \pi}{5}\) isWBJEE 2014 Medium
- If \(z=x+i y,\) where \(x\) and \(y\) are real numbers and \(i=\sqrt{-1}\), then the points \((x, y)\) for which \(\frac{z-1}{z-i}\) is real, lie onWBJEE 2013 Medium
- A piece of wood from an archaeological sample has 5.0 counts min \(^{-1}\) per gram of \(\mathrm{C} - 14,\) while a fresh sample of wood has a count of \(15.0 \mathrm{min}^{-1} \mathrm{g}^{-1}\). If half-life of \(\mathrm{C}-14\) is \(5770 \mathrm{yr}\) the age of the archaeological sample isWBJEE 2014 Medium
- \(\mathrm{Cl}_{2} \mathrm{O}_{7}\) is the anhydride ofWBJEE 2018 Easy