Question
Why does cause more severe burns than water at $100^0C?$
✓
Answer
Steam causes more severe burns than water at $100^oC$ because every gram of steam gives out $2260$ J of heat energy while condensing. This much quantity of heat is additional to the heat contained in $1$ g of boiling water.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
How will you oonnect five resistors, each of the value one ohm, to obtain an equivalent resistance of $0.2 \Omega$
→Calculate the height through which a body of mass 0.5 kg is lifted if the energy spent in doing so is 1.0 J . Take $g =10 m s ^{-2}$.
→Write approximate wavelength for (i) blue (ii) red light. Which colour has the higher speed in a vacuum? Which colour has the higher speed in the glass?
Fig 3.17 below shows a lever in use.
(a) To which class of lever does it belong?
(b) If $FA =80 cm , AB =20 cm$, find its mechanical advantage.
(c) Calculate the value of $E$.
→(a) To which class of lever does it belong?
(b) If $FA =80 cm , AB =20 cm$, find its mechanical advantage.
(c) Calculate the value of $E$.
(a) State expression for electric work in terms of potential difference, current and time.
(b) An electrical heater is rated $4 kW, 220 V$. Find the cost of using this heater for 12 hours if one kWh of electrical energy costs ₹ 3.25 .
→(b) An electrical heater is rated $4 kW, 220 V$. Find the cost of using this heater for 12 hours if one kWh of electrical energy costs ₹ 3.25 .
A piece of iron of mass $2.0$ kg has a thermal capacity of $966 J /{ }^{\circ} C$. Find: (i) Heat energy needed to warm it by $15^{\circ} C$, and (ii) Its specific heat capacity in SI unit.
→Why should a radioactive substance not be touched by hand?
Why are the waves mentioned by you not audible to us?
State the factors that can increase the speed of rotation of the coil in a D.C. motor.
State one condition for a body to execute free vibrations.