Why might you want to use a single fixed pulley?
a to reduce the force needed to raise objects
b to raise or lower heavy objects
c
to raise or lower lightweight objects

d
to reduce the weight of lifted objects

Which figures of speech appear in this excerpt from john keats’s “ ode to autumn “?

The diagram shows the layers of earth. convection currents in which region influence the movement of tectonic plates

Juan and carol were studying invertebrates in biology. they knew that segmented or earth worms preferred a dark, moist habitat. during this lab, they would be investigating the responses of organisms called planaria or dugesia tigrina. these were simple flatworms that still had a one-way digestive system and a very simple nervous system. juan and carol placed the planaria in a petri dish containing cool, distilled water that was partially covered with black paper. they shined a light on the dish. next, they removed the paper and placed a small amount of chicken liver at one end of the dish. they added a few large salt crystals to the water. finally, they added drops of hot water to the cool water in the petri dish. their results can be seen in the data table. according to their experiment, all but one conclusion is valid.