Hi, i'm new here! i need , i will give points! a force of 13 n is applied to the handle of a screwdriver being used to pry off the lid of a
paint can. as the input force moves through a distance of 0.25 m, the screwdriver does 2
j of work on the lid. what is the efficiency of the screwdriver? show your work.
you pull the rope of a pulley 8 meters to lift the box on the other end a distance of 2
meters. what is the ideal mechanical advantage of the pulley system? show your work.
a pot of water has a mass of 950g. the specific heat of water is 4.18 j/kg•℃. how much
heat must be absorbed to raise the temperature of the water from 28℃ to 85℃? show
your work.
Answers: 3
Biology, 22.06.2019 02:00
Which of the following describes a negative feedback loop? when the heart rate is too high, the body sends hormones that continually increase the heart rate higher. when a pregnant woman is in labor, the body sends hormones that increase the intensity of contractions, which then increases the secretion of the same hormones. when blood sugar is too low, the body sends hormones that raise blood sugar until it reaches a typical level and hormone secretion slows. when a person is jogging, the body sends hormones that continually decrease the rate of oxygen supply to the legs.
Answers: 1
Biology, 22.06.2019 19:30
Why are lipids and proteins free to move laterally in membranes?
Answers: 1
Biology, 23.06.2019 00:00
Which process the first step in making a protein from dna intrsuction
Answers: 1
Hi, i'm new here! i need , i will give points! a force of 13 n is applied to the handle of a screw...
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