Question
Tea gets cooled when sugar is added to it. Why?
✓
Answer
The sugar absorbs heat energy from the tea and hence temperature of the tea decreases.
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
The surface tension of water is 72 dyne/cm. Convert it in SI unit.
The value of force impulse will be equal to which quantity? Write its formula.
Answer the following: The absolute temperature (Kelvin scale) T is related to the temperature tc on the Celsius scale by tc = T – 273.15.
A spring of force constant k is broken into n equal parts (n > 0). What will be the spring factor of each part?
Under which condition $(i)$ the centre of buoyancy coincides with the centre of gravity $(ii)$ the centre of buoyancy does not coincide with the centre of gravity.
→It is easier to pull lawn roller than to push it. Why?
Name the waves which do not require any material medium for their propagation.
Science, like any knowledge, can be put to good or bad use, depending on the user. Given below are some of the applications of science. Formulate your views on whether the particular application is good, bad or something that cannot be so clearly categorised:
→- Mass vaccination against small pox to curb and finally eradicate this disease from the population. $($This has already been successfully done in India$).$
- Television for eradication of illiteracy and for mass communication of news and ideas.
- Prenatal sex determination.
- Computers for increase in work efficiency.
- Putting artificial satellites into orbits around the Earth.
- Development of nuclear weapons.
- Development of new and powerful techniques of chemical and biological warfare.
- Purification of water for drinking.
- Plastic surgery.
- Cloning.
Fig. depicts four x-t plots for linear motion of a particle. Which of the plots represent periodic motion? What is the period of motion (in case of periodic motion)?
Give the magnitude and direction of the net force acting on. A cork of mass 10g floating on water.