Please select a subject first
Advertisements
Advertisements
Write a short note on different types of clocks.
Concept: undefined >> undefined
Advertisements
A simple barometer was first constructed by _______.
Concept: undefined >> undefined
Match the following.
| Barometer | reduce friction |
| Increasing area of contact | Atmospheric pressure |
| Decreasing area of contact | cause of friction |
| Lubricants | increases friction |
| Irregular surface | decreases friction |
Concept: undefined >> undefined
Vidhya feels that mercury is costly. So, instead of mercury she wants to use water as a barometric liquid. Explain the difficulty of constructing a water barometer.
Concept: undefined >> undefined
If the thickness of a vibrating string is increased, its pitch _____.
Concept: undefined >> undefined
______ are used to lift heavy iron pieces.
Concept: undefined >> undefined
What is artificial magnet? Give examples.
Concept: undefined >> undefined
Distinguish between natural and artificial magnets?
Concept: undefined >> undefined
How will you convert a ‘nail’ into a temporary magnet?
Concept: undefined >> undefined
Which of the following is the working principle of Rockets?
Concept: undefined >> undefined
PSLV and GSLV are India’s popular satellites.
Concept: undefined >> undefined
Water contains _____ and _____ element.
Concept: undefined >> undefined
Match the following.
| Atom | Building block of matter |
| Element | Atoms of different kinds |
| Compound | Atoms of the same kind |
| Molecule | Smallest unit of a substance |
Concept: undefined >> undefined
Why are utensils made up of aluminium and brass?
Concept: undefined >> undefined
Name the compounds produced when the following substances burn in oxygen.
- Carbon
- Sulphur
- Phosphorous
- Magnesium
- Iron
- Sodium
Concept: undefined >> undefined
Why does the fish die when it is taken out of water?
Concept: undefined >> undefined
