AP EAMCET · PHYSICS · Thermal Properties of Matter
The heat energy released by water of mass \(2 \mathrm{~kg}\) when it is cooled by \(10^{\circ} \mathrm{C}\) is
(Specific heat capacity of water \(=4200 \mathrm{~J} \mathrm{~kg}^{-1} \mathrm{~K}^{-1}\) )
- A \(42000 \mathrm{~J}\)
- B \(21000 \mathrm{~J}\)
- C \(63000 \mathrm{~J}\)
- D \(84000 \mathrm{~J}\)
Answer & Solution
Correct Answer
(D) \(84000 \mathrm{~J}\)
Step-by-step Solution
Detailed explanation
Mass, \(\mathrm{m}=2 \mathrm{~kg}\) Temperature, \(\Delta \mathrm{T}=10^{\circ} \mathrm{C}\) Heat capacity, \(c=4200 \mathrm{JKg}^{-1} \mathrm{~K}^{-1}\) Heat energy is given by…
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
- A particle of mass ' \(m\) ' at rest on a rough horizontal surface with a coefficient of friction ' \(\mu\) ' is given a velocity ' \(u\) '. The average power impaired by friction before it stopsAP EAMCET 2024 Medium
- A projectile is thrown in the upward direction making an angle of \(60^{\circ}\) with the horizontal with a velocity of \(140 \mathrm{~ms}^{-1}\). Then the time after which its velocity makes an angle \(45^{\circ}\) with the horizontal is (Acceleration due to gravity, \(g=10 \mathrm{~ms}^{-2}\) )AP EAMCET 2019 Medium
- A body is projected with a velocity \((\hat{\mathrm{i}}+2 \hat{\mathrm{j}}) \mathrm{ms}^{-1}\), where \(\hat{\mathrm{i}}\) is along the horizontal and \(\hat{\mathrm{j}}\) is vertically upward. Then the equation of its trajectory is \(\left(\mathrm{g}=10 \mathrm{~ms}^{-2}\right)\)AP EAMCET 2017 Easy
- A ball is projected upwards. Its acceleration at the highest point isAP EAMCET 2021 Easy
- In an experiment, four quantities \(a, b, c, d\) are measured with percentage errors 2\%, \(1 \%, 3 \%\) and 5\%, respectively. Quantity \(P\) is measured as \(P=\frac{a^2 b^2}{c d}\). Find the percentage error in measuring \(P\).AP EAMCET 2021 Easy
- The number of rotational degrees of freedom of a diatomic moleculeAP EAMCET 2022 Easy
More PYQs from AP EAMCET
- In a matrix \(A\), if all the sub matrices or \(k\) orcer are singular and there is one non-singular sub matrix of order r \((r < k)\), then the rank \((\rho)\) of the matrix AAP EAMCET 2023 Easy
- If in a right angled triangle \(\mathrm{ABC}\), the hypotenuse \(|\overrightarrow{A B}|=p\) then \(\overline{A B} \cdot \overline{A C}+\overline{B C} \cdot \overline{B A}+\overline{C A} \cdot \overline{C B}=\)AP EAMCET 2017 Easy
- If the vector \(\overline{\mathrm{i}}-7 \overline{\mathrm{j}}+2 \overline{\mathrm{k}}\) is along the internal bisector of the angle between the vectors \(\bar{a}\) and \(-2 \bar{i}-\bar{j}+2 \bar{k}\) and the unit vector along \(\bar{a}\) is \(x \bar{i}+y \bar{j}+z \bar{k}\) then \(\mathrm{x}=\)AP EAMCET 2025 Medium
- A circular disc of diameter 0.8 m and mass 4 kg is rolling on a smooth horizontal plane. If 2.56 N m torque is acting on the disc, then its angular acceleration isAP EAMCET 2025 Medium
- If \((l, m)\) is the circumcentre of an equilateral triangle inscribed in the ellipse \(\frac{x^2}{a^2}+\frac{y^2}{b^2}=1\) having vertices at points with eccentric angles \(\theta_1, \theta_2\) and \(\theta_3\), then \(\frac{2}{3}\left[\cos \left(\theta_1-\theta_2\right)+\cos \left(\theta_2-\theta_3\right)+\cos \left(\theta_3-\theta_1\right)\right]=\)AP EAMCET 2019 Medium
- If \(A=\left[\begin{array}{ccc}1 & 2 & -2 \\ 2 & -1 & 2 \\ -1 & 1 & -2\end{array}\right]\), then \(A+2 A^{-1}=\)AP EAMCET 2025 Medium