Estimate the power you deliver when starting to walk from a standstill, in W:
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Your body radiates about 88 W in heat energy. How much energy, in J, is radiated in one hour?
Power when starting to walk=changeinKE/time
One watt is a joule per second. How many seconds are in an hour?
You need to put your thinking into these, and let us critique it. Most folks here are not inclined to do that for students.