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Tungsten is used because it has the highest melting point of all the metallic elements. It melts at 3410 degrees Celsius. When current passes through the filament it heats it up. When the filament reaches a certain temperature it starts to give off light, that's how we get a light bulb. The first successful light bulb filaments were made of carbon (from carbonized paper or bamboo).
A man travelled a total distance of 350 km. He travelled first 200 km on car with a speed of 20 km/h and rest of the distance on bike whose speed is 5 k...
The distance between two points 'P' and 'Q' is 2,400 km. Karan and Mohit can cover the distance between 'P' and 'Q' in 40 hours and 32 hours, respective...
A train 180 meters long passes a man walking in the same direction at 6 km/h in 15 seconds. What is the speed of the train?
‘K’ and ‘L’ are going from place ‘X’ to place ‘Y’, which is 1100 km apart. If ‘K’ started 3 hours after ‘L’ but both of them rea...
‘A’ and ‘B’ started moving towards each other at same time with a speed of 27 km/hr and 15 km/hr, respectively. If the distance covered by ‘Aâ...
‘A’ and ‘B’ started moving towards each other at same time with a speed of 25 km/hr and 20 km/hr, respectively. If the distance covered by ‘Aâ...
X started to run from point ‘A’ to ‘B’ at a speed of 28 km/hr at 9:00 am and Y started to run from point ‘B’ to ‘A’ at a speed of 12 km/...
Travelling at a speed of 54 km/h, Chaman reaches a place 3 minutes early. If he had travelled at a speed of 48 km/h, he would have been 1 minute late. W...
‘A’ and ‘B’ started moving towards each other at same time with a speed of 25 km/hr and 15 km/hr, respectively. If the distance covered by ‘Aâ...
Emily walks to the library at 4 km/h and returns at 2 km/h. The total time spent traveling is 9 hours. What is the distance from her home to the library?
