mass of 6.00 kg. Consider that the melting temperature of aluminum is 660 ° C and that its specific heat at room temperature and at a constant pressure is 910 J/kg · °C Consider that all the mechanical energy that is dissipated when the car stops is transferred to the brakes as heat and that energy is not transferred out of the brakes by heat. The brakes initially are at 20.0 degrees Celsius and through calculations using the following formula n(K.E) = m,CAT= m,c (Tm-To) the number of times that the car can be stopped from 25 m /s before the brakes start to melt is 7 What are some of the ignored effects in the calculation of the number of times that the car can be stopped from 25 m/s that are relevant to a more realistic assessment of brake heating?

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A car has a mass of 1500 kg, and its aluminum brakes have an overall
mass of 6.00 kg.
Consider that the melting temperature of aluminum is 660 ° C and that
its specific heat at room temperature and at a constant pressure is 910
J/kg · °C
Consider that all the mechanical energy that is dissipated when the
car stops is transferred to the brakes as heat and that energy is not
transferred out of the brakes by heat. The brakes initially are at 20.0
degrees Celsius and through calculations using the following formula
n(K.E) = m,CAT= m,c (Tm-To) the number of times that the car can be
stopped from 25 m/s before the brakes start to melt is 7
What are some of the ignored effects in the calculation of the number
of times that the car can be stopped from 25 m/s that are relevant to a
more realistic assessment of brake heating?
Transcribed Image Text:A car has a mass of 1500 kg, and its aluminum brakes have an overall mass of 6.00 kg. Consider that the melting temperature of aluminum is 660 ° C and that its specific heat at room temperature and at a constant pressure is 910 J/kg · °C Consider that all the mechanical energy that is dissipated when the car stops is transferred to the brakes as heat and that energy is not transferred out of the brakes by heat. The brakes initially are at 20.0 degrees Celsius and through calculations using the following formula n(K.E) = m,CAT= m,c (Tm-To) the number of times that the car can be stopped from 25 m/s before the brakes start to melt is 7 What are some of the ignored effects in the calculation of the number of times that the car can be stopped from 25 m/s that are relevant to a more realistic assessment of brake heating?
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