The composition of electrician solder is
A). Lead-37%, tin-63%
B). Iron-37%, tin-63%
C). Lead-37%, Steel-63%
D). Steel-37%, copper-63%
Lead-37%, tin-63%
The composition of electrician solder is Lead-37%, tin-63%.
1. Who among the following is credited for the discovery of ''Expanding Universe"?
2. The core of an electromagnet is made of soft iron because soft iron has
3. The massive hole in the ozne layer over the Antharctica was first discovered in
5. The value of coefficient of restitution in perfectly elastic collision is
6. Inside an aeroplane, flying at a high altitude,
7. The minimum number of geostationary satellites needed for uninterrupted global coverage is :
9. The magnifying power of an astronomical telescope can be decreased by
10. Metals are good conductor of heat?than insulator because