Metals are good conductor of heat?than insulator because
1). their atoms are relatively aprt
2). they contain free electron
3). they have reflecting surface?
4). none of these
1. Specific gravity is defined as the ratio of
2. In a diesel engine the high temperature needed to ignite the fuel Is achieved by
3. Which liquid is the most viscous?
4. If a copper wire Is increased to double its length Its resistance will become
5. Which is a common first indicator of an approaching thunderstorm?
6. Sound waves are similar to the?waves
7. Who among the following is credited for the Corpuscular theory of light?