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#1 A microwave oven has a power requirement of 1,261 W. A frozen dinner requires 4.1...

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Physics

#1 A microwave oven has a power requirement of 1,261 W. A frozendinner requires 4.1 min to heat on full power.

(a) How much electrical energy (in kWh) is used?
_________kWh

(b) If the cost of electricity is 13¢ per kWh, how much does itcost to heat the dinner? (Do not round your final answer.Fractional cent values are acceptable.)
______________¢

#2 - A student who weighs 556 N climbs a stairway (verticalheight of 2.6 m) in 23 s.

(a) How much work is done?
__________J

(b) What is the power output of the student?
__________W

Answer & Explanation Solved by verified expert
4.5 Ratings (892 Votes)
The concept used is of energy consumed and power initially icalculate the    See Answer
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