What is the power of an engine which can lift 600kg of coal per minute from a mine 20m deep?
A. 2000 w
B. 100 w
C. 1000 w
D. 200 w
Answer:A
What is the power of an engine which can lift 600kg of coal per minute from a mine 20m deep?
A. 2000 w B. 100 w C. 1000 w D. 200 w