Athlete Climbs w/ 4 Potato Chips - Amount Heated 44

  • Thread starter Thread starter soulja101
  • Start date Start date
Click For Summary
SUMMARY

The discussion focuses on calculating the height an athlete can climb using energy from consuming four potato chips, given her mass of 60.0 kg and an energy conversion efficiency of 24%. With an average power output of 325W, the energy derived from the chips, totaling 1.45 million joules, allows her to climb approximately 4476.9 seconds worth of stairs. Additionally, the discussion explores the heating of water using the same energy, determining that 28 grams of potato chips can heat water from 13°C to 20°C, transferring 1130.5 joules of energy.

PREREQUISITES
  • Understanding of energy conversion efficiency
  • Basic knowledge of power calculations (Power = Energy/Time)
  • Familiarity with specific heat capacity (Cp) calculations
  • Ability to manipulate equations involving mass and temperature change
NEXT STEPS
  • Study energy conversion efficiency in physical systems
  • Learn advanced power calculations in physics
  • Explore specific heat capacity and its applications in thermal energy transfer
  • Investigate the relationship between mass, energy, and temperature changes in calorimetry
USEFUL FOR

Students in physics, sports scientists, nutritionists analyzing energy expenditure, and anyone interested in the practical applications of thermodynamics in physical activities.

soulja101
Messages
61
Reaction score
0

Homework Statement


A)If an athlete (whose mass is 60.0kg) has an energy conversion effiency of 24% and she has an average power of 325W when climbing stairs how high would she be able to climb with the energy consumed from eating 4 potatop chips(28g of chips has 610 kJ of energy and 28g of chips is approximately 15 chips.
B)If the bag of chips in the above questions had been burned and used to heat water from 13degrees celsius to 20 degress celsius, then how much water was being heated(assuming 100%energy conversion)

Homework Equations


Eout/Ein*100%


The Attempt at a Solution



m=60.0kg
Efficiecny=24%
P=325 W
 
Physics news on Phys.org
A)Ein= 610 kJ= 6.1*10^6 JEout= Ein*efficiencyEout=6.1*10^6 J *0.24 Eout=1.45*10^6 J Energy consumed from 4 potato chips= 1.45*10^6 JPower=E/tt=E/Pt=1.45*10^6 J /325 Wt=4476.9 secB)Heat energy transferred=mass*Cp*deltaTMass of water=28gCp=4.186J/g*KdeltaT= 20-13=7KHeat energy transferred=28g*4.186J/g*K*7KHeat energy transferred=1130.5 J