Answer:
c
Explanation:
Superconductors perform best at very cold temperatures because resistivity of this kind of materials decays drastically with temperature. Chromium is most likely to be the best conductor of electricity because it belongs to the Transition Metal group of the periodic table
Answer:
this is in the middle of the wheel and helps it rotate it is an axle
Time taken = Distance traveled/Average speed
Here distance traveled by the car = 240 km
Average speed of the car = 60 km/hr
So total time taken = 240/60 = 4 hours
= 240 minutes
= 14400 seconds
So the car will take 4 hours to cover 240 kilometers at an average speed of 60 km/hr.
