Advertisements
Advertisements
Question
Choose the correct option.
Water falls from a hight of 200 m. What is the difference in temperature between the water at the top and bottom of a waterfall given that the specific heat of water is 4200 J kg-1 °C-1?
Options
0.96° C
1.02° C
0.46° C
1.16° C
Advertisements
Solution
0.46° C
Explanation:
The potential energy at height = kinetic energy at bottom Assuming all kinetic energy is converted into heat, Let ΔT be the rise in temperature of water observed at the bottom
∴ mgh = m s ΔT
∴ ΔT = `"gh"/"s" = (9.8 xx 200)/4200 = 0.467^circ`C
APPEARS IN
RELATED QUESTIONS
Choose the correct option.
Range of temperature in a clinical thermometer, which measures the temperature of the human body, is
Choose the correct option.
If α, β and γ are coefficients of linear, area l and volume expansion of a solid then
Choose the correct option.
Consider the following statements-
(I) The coefficient of linear expansion has dimension K-1.
(II) The coefficient of volume expansion has dimension K-1.
The graph between volume and temperature in Charles’ law is _________.
Write the unit of specific heat capacity.
Define molar specific heat capacity.
What is a thermal expansion?
Give the expression for linear thermal expansion.
Give the expression for volume thermal expansion.
Define latent heat capacity.
Define thermal conductivity.
Write the unit of thermal conductivity.
Explain in detail the thermal expansion.
Describe the anomalous expansion of water. How is it helpful in our lives?
Explain Calorimetry and derive an expression for final temperature when two thermodynamic systems are mixed.
Calculate the number of moles of air is in the inflated balloon at room temperature as shown in the figure.
The radius of the balloon is 10 cm, and the pressure inside the balloon is 180 kPa.
The temperature of a uniform rod of length L having a coefficient of linear expansion αL is changed by ∆T. Calculate the new moment of inertia of the uniform rod about the axis passing through its center and perpendicular to an axis of the rod.
Another name for thermal energy is ______
Which of the following is the fourth fundamental quantity introduced while studying heat?
Which three fundamental quantities were used to describe mechanical systems before studying heat?
What is the difference between temperature and heat energy?
Why is the sense of touch not sufficient to measure temperature scientifically?
