A strong spring is stretched 10 cm by a suspended weight.If the weight is doubled,the spring will stretch
A) no more.
B) another 5 cm,making the total stretch 15 cm.
C) another 10 cm,making the total stretch 20 cm.
D) another 30 cm,making the total stretch 40 cm.
E) more than another 30 cm.
Correct Answer:
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