The Mpemba effect is the name given to the assertion that it is quicker to cool water to a given temperature when the initial temperature is higher.
Marie Curie was a polish-french physicist and chemist who conducted pioneering research on radioactivity.
Geosphere, hydrosphere, atmosphere, and biosphere.
Therefore, the correct answer is D.
Let distance be x.
Time in going, t 1 = x/50
Time in coming, t 2 = x/40
Total time T = x/40 +x/50 = 9x/200
Average speed = total distance/ total time
=( x+x)/(9x/200)= 2x ×200/9x = 400/9 = 44.44 km/h
Answer:
Gravitational field strength =weight/mass
Explanation:
14.8N/4.0kg
3.7N/kg