Yes because the acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
Activation energy is the energy required for a reaction to occur, and determines its rate.<span>
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Objects sink if they are denser than water
Part a)
Power rated on the elevator is given as
now the mass that is lifted above is given as
height of the elevator lifted is
now the potential energy is given as
now power is defined as rate of energy
so it will take 13.5 s to lift up
Part b)
Electrical energy used
so electrical energy used in this process will be 120050 J
<span>The standard DH for this reaction is -852 kJ/rxn. When attacking a problem like this, the first thing to always do is to convert grams (which is a unit of measurement) into moles (which is a unit of chemistry). The atomic weight of aluminum is 26.98 g/mol, so you can divide your mass by the molecular weight to find that you have 1.81 mol of aluminum. Note then that you use up two moles of aluminum per reaction cycle (as defined by the coefficient), so you can divide your number of moles of aluminum by 2 mol Al/rxn. So now you know that you have enough aluminum for .903 reaction cycles, so you can multiply your standard enthalpy by the number of reaction cycles that can progress, and you should end up with a total of -769 kJ of energy, which equates to a release or evolution (rather than an absorption) of 769 kJ of energy.</span>
