oh my goodness 18 views and still no answer?
is it cause no one can be bothered to answer or you dont get' it' like me?
I get question A but the rest i dont get, can someone give me a clear worked out answer to each question thanks a lot.
you walk up a 100m high mountain, which takes you 5 hours . walking on the flat consumes about 400w. you are hoping to lose some of your 70kg with all this excercise but on the way you eat four small chocolate bars, which according to the wrapper will each supply 1130kj.
A) calculate the energy you expend during the 5 hour walk, assuming that while you are climbing, your body works with an efficieny of only 15%?
B) calculate the energy that must be obtained from your body after the energy from the chocolate has been used?
C) if fat converts to energy at a rate of 38MJ-1 how much mass are you likely to lose?
A unit like Joules is named after a person so it is capitalized: "J," not "j." The same comment applies to Watts (W).
The unit meter has the designation "m." The prefix mega ( ) has the designation M. Are you trying to say that fat converts to energy at a rate of . In other words you mean that 1 kg of fat, when converted, provides 38 MJ of energy?
The problem I have is that the answer for A is
The answer for B is
which is vastly greater than the energy expended in A.
I wouldn't say it's a trick question, simply that someone made a typo somewhere.