A spring has a spring constant of 115 N/m. How much force is required to
stretch the spring 0.75 m past its natural length?
THERE
O A. 112 N
OB. 86.3 N
O C. 72.1 N
Ô D. 153 N
PAR
SUBMIT

How is coal extracted from mountaintop removal mines? a. dynamite is used to create underground tunnels where miners go to extract the coal. b. dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal. c. coal in mountaintops is extracted by digging strips in the landscape to reach the coal. d. placer deposits in mountain river bottoms are removed by

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An architect plans to use solar energy to heat the next house he designs. what principle of absorption and infrared energy can be applied to the design of the new house? how could she apply to those principals?