Chemistry, 22.11.2019 12:31 jetblackcap
The effort needed when a simple machine is used is best described by which of these statements?
a) the effort force is always smaller than the force needed without the machine.
b) the effort force is always greater than the force needed without the machine.
c) the effort force is most often smaller than the force needed without the machine.
d) the effort force is most often greater than the force needed without the machine.
Answers: 2
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Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]
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The effort needed when a simple machine is used is best described by which of these statements?
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