By dropping a drop of water on a glowing electric blub, it bursts. This is because glass is a:
Good conductor of heat
Bad conductor of heat
Transparent substance
Good conductor of electricity
Equal volumes of different substances
Have equal weights
Have equal densities
Need not have equal weights
None
Door locks are made of metals because metals:
Have luster
Are opaque
Are good conductors of heat
Are hard and strong
Most of the metals:
Are hard
Are good conductors of electricity
All of these
Salt water is a
Bad conductor of electricity
Insulator
All the above
Clinical thermometers are made up of glass. The important characteristic(s) considered for this selection is/are:
It is a bad conductor of heat
It is transparent
Both A and B
It is strong
1 kg of iron occupies less space compared to 1 kg of sponge. Why ?
Iron has less density than sponge
Iron and sponge have equal densities
Iron has more density than sponge
A mirror is
Opaque
Transparent
Tanslucent
Opaque objects:
Reflect most of the light falling on them
Transmit most of the light falling on them
Absorb most of the light falling on them
Are strong and hard
Which of the following material is hard, opaque and shines when freshly cut ?
Rubber
Wood
Tin
Plastic
