Advertisements
Advertisements
Question
Heat and work are equivalent. This means, ____________ .
Options
when we supply heat to a body we do work on it
when we do work on a body we supply heat to it
the temperature of a body can be increased by doing work on it
a body kept at rest may be set into motion along a line by supplying heat to it
Advertisements
Solution
the temperature of a body can be increased by doing work on it
According to the statement "heat and work are equivalent", heat supplied to the body increases its temperature. Similarly, work done on the body also increases its temperature.
For example: If work is done on rubbing the hands against each other, the temperature of the hands increases. So, we can say that heat and work are equivalent.
When heat is supplied to a body, we do not do work on it. When we are doing work on a body, it does not mean we are supplying heat to the body. Also, a body at rest cannot be set in motion along a line by supplying heat to it. So, these statements do not justify the equivalence of heat and work.
APPEARS IN
RELATED QUESTIONS
The dimensions of emissive power are ______.
The susceptibility of magnesium at 300 K is 2.4 x 10-5. At what temperature will the susceptibility increase to 3.6 x 10-5?
A body cools from 62°C to 54°C in 10 minutes and to 48°C in the next 10 minutes. Find the temperature of the surroundings.
Can the bulb of a thermometer be made of an adiabatic wall?
An aluminium sphere is dipped into water at 10°C. If the temperature is increased, the force of buoyancy
Should a thermometer bulb have large heat capacity or small heat capacity?
When a hot liquid is mixed with a cold liquid, the temperature of the mixture ____________ .
A resistance thermometer reads R = 20.0 Ω, 27.5 Ω, and 50.0 Ω at the ice point (0°C), the steam point (100°C) and the zinc point (420°C), respectively. Assuming that the resistance varies with temperature as Rθ = R0 (1 + αθ + βθ2), find the values of R0, α and β. Here θ represents the temperature on the Celsius scale.
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?
A steel wire of cross-sectional area 0.5 mm2 is held between two fixed supports. If the wire is just taut at 20°C, determine the tension when the temperature falls to 0°C. Coefficient of linear expansion of steel is 1.2 × 10–5 °C–1 and its Young's modulus is 2.0 × 10–11 Nm–2.
Two tumblers of A and B have water at 50°C temperature. If the water from A and B is poured into tumbler C. The temperature of C is ______.
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 ______.
The normal temperature of our body is 37°C.
The degree of hotness and coldness of a body is called ______.
Which state of matter has particles that vibrate about fixed equilibrium positions?
Which of the following correctly differentiates heat from temperature?
