Advertisements
Advertisements
प्रश्न
The temperature of water at the surface of a deep lake is 2°C. The temperature expected at the bottom is
विकल्प
0 °C
2 °C
4 °C
6 °C
Advertisements
उत्तर
4 oC
The density of water is maximum at 4 oC, and the water at the bottom of the lake is most dense, compared to the layers of water above. Therefore, the temperature expected at the bottom is 4oC.
APPEARS IN
संबंधित प्रश्न
A metal ball cools from 64 °C to 50 °C in 10 minutes and to 42 °C in next 10 minutes. The ratio of rates of fall of temperature during the two intervals is _______.
The substance which allows heat radiations to pass through is _______.
(A) iron
(B) water vapour
(C) wood
(D) dry air
Can the bulb of a thermometer be made of an adiabatic wall?
Why do marine animals live deep inside a lake when the surface of the lake freezes?
The density of water at 4°C is supposed to be 1000 kg m–3. Is it same at sea level and at high altitude?
As the temperature is increased, the time period of a pendulum
Water equivalent of a body is measured in ___________ .
Which of the following pairs of physical quantities may be represented in the same unit?
A concrete slab has a length of 10 m on a winter night when the temperature is 0°C. Find the length of the slab on a summer day when the temperature is 35°C. The coefficient of linear expansion of concrete is 1.0 × 10–5 °C–1.
A circular hole of diameter 2.00 cm is made in an aluminium plate at 0°C. What will be the diameter at 100°C? α for aluminium = 2.3 × 10–5 °C–1.
A pendulum clock shows correct time at 20°C at a place where g = 9.800 m s–2. The pendulum consists of a light steel rod connected to a heavy ball. It is taken to a different place where g = 9.788 m s–1. At what temperature will the clock show correct time? Coefficient of linear expansion of steel = 12 × 10–6 °C–1.
The densities of wood and benzene at 0°C are 880 kg m3 and 900 kg m–3 , respectively. The coefficients of volume expansion are 1.2 × 10–3 °C–1 for wood and 1.5 × 10–3 °C–1for benzene. At what temperature will a piece of wood just sink in benzene?
Answer the following question.
Clearly, state the difference between heat and temperature?
Temperature and Heat are ______
Two objects are said to be in thermal contact if they can exchange heat energy.
One day in 1922, the air temperature was measured at 59°C in the shade in Libya ______.
In the formula Q = mcΔT, what does c represent?
Which formula gives the average kinetic energy per molecule of an ideal gas?
According to the Zeroth Law, if A is in thermal equilibrium with B, and B with C, then:
What is the best description of heat in thermodynamics?
