conservation of angular momentum the torque caused by the two opposing forces fg and -fg causes a change in the angular momentum l in the direction of that torque (since torque is the time derivative of angular momentum). this causes the top to move back upright. in a closed system, angular momentum is constant...
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"one of the great things about these systems is that the weight, centre of gravity and footprint of the load really doesn't matter as long as the cylinders and shoes aren't overloaded. in comparison, the weight, size and cog of a load is critical information when choosing a crane to mobilize," says smith...
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euros secured for new photovoltaic projects in poland - - whisky cull barrels provide renewable energy source for canadian grower - - netherlands: powerhouse takes over gas portfolio of gas natural europe - - "scaling up co-generation for a flexible heat supply could be the next step - - china: large-scale...
"we realized that this was an incredibly efficient way of growing crops," olesen said. upon researching into how large commercial greenhouses use this technology, olesen and smith began looking into how it could be used on a smaller scale. while the technology never made it into refugee camps, they started...