During the rock cycle, cooling magma and lava form igneous rock, heat and pressure cause other rocks to turn into metamorphic rock, and weathered rock on the surface is eventually turned into sedimentary rock. rocks move through this cycle at different rates, but it can take some rocks several billion years to complete the cycle. using this information, what is the most likely reason why scientists use models to study the rock cycle a. the rock cycle only affects objects that are too small to be observed directly. b. the rock cycle takes too long to be able to observe it in its entirety. c. the rock cycle is only an abstract idea and does not actually occur in nature. d. the rock cycle no longer occurs on earth.

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3. a worker pushes a 30.5 kg polished stone along a polished table with a force on bonin a straight line for 5.20 s after starting from rest. there is no friction between thestone and the table. at the end of the table. the stone is hooked to a cable with a lengthof 62.0 cm to rotate it to a rough table to store until they can be picked up. the roughtable has a coefficient of static friction 0.702 with the polished stone. remember that 8= 9.80 m/s2a) what is the speed of the stone when it is hooked to the cable? b) what is the tension in the cable while the stone is rotating? (there is still nofriction)c) how much force is needed to make the stone begin sliding from rest on therough table? ius = 0.70262.0 cm30.5 kg20.5 kg6= 0

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