Physics, 12.11.2019 04:31, bluebunny1231999

# Energy is conventionally measured in calories as well as in joules. one calorie in nutrition is one kilocalorie, defined as 1 kcal = 4 186 j. metabolizing 1 g of fat can release 9.00 kcal. a student decides to try to lose weight by exercising. he plans to run up and down the stairs in a football stadium as fast as he can and as many times as necessary. to evaluate the program, suppose he runs up a flight of 95 steps, each 0.150 m high, in 63.0 s. for simplicity, ignore the energy he uses in coming down (which is small). assume that a typical efficiency for human muscles is 20.0%. therefore when your body converts 100 j from metabolizing fat, 20 j goes into doing mechanical work (here, climbing stairs). the remainder goes into extra internal energy. assume that the student's mass is 74.0 kg.(a) how many times must the student run the flight of stairs to lose 1.00 kg of fat? times(b) what is his average power output, in watts and horsepower, as he runs up the stairs? whp(c) is this activity in itself a practical way to lose weight?

Answers: 3

Physics, 21.06.2019 17:20, londonval

Your 249 ml cup of coffee is too hot to drink when served at 82 degree celsius. what is the mass of an ice cube taken from a -21 degree celsius freezer, that will cool your coffee to a pleasant 54 degree celsius. specific heat of the water is 4190 j/kg c, specific heat of ice is 2090 j/kg c, heat of fusion of ice is 3.33 x 10^5 j/kg

Answers: 3

Physics, 21.06.2019 19:00, michael2737

Aman tries to push a box of mass 4 kg with a force of 5 n but the box remains stationary if the coefficient of static friction is 0.45, what is the value of the maximum force of friction?

Answers: 2

Physics, 21.06.2019 22:00, penaabel6202

Which units can be used to measure length or distance? check all that apply. gram meter kilometer liter inch

Answers: 1

Physics, 22.06.2019 01:20, lizzyhearts

Asingle seismograph can accurately locate the epicenter of an earthquake. t or f

Answers: 2

Energy is conventionally measured in calories as well as in joules. one calorie in nutrition is one...

Spanish, 06.07.2019 00:00

History, 06.07.2019 00:00

History, 06.07.2019 00:00

Biology, 06.07.2019 00:00

Biology, 06.07.2019 00:00