Why does the screw have a very low efficiency? because with a low effort it can lift large loads. because it take a huge effort to turn in order to lift large loads. because the input work is much greater than the output work.

Sarah wants to know where in her garden chamomile would grow the best. she thinks chamomile will grow best in the corner of the garden that gets the most sunlight. to test her hypothesis, she decides to plant several groups of chamomile in her garden as an experiment. which of the following variables will sarah need to measure to know which group of plants grew best? a. the location of the plants b. the type of plants c. the height of the plants d. the amount of water she gives the plants

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

8) warming your hands by a fire is an example if which heat transfer? a. conduction b. convection c. radiation d. none of these