If the cost of electricity is $0.140/kWh, calculate the cost of: a) leaving the 40W kitchen light on for 3 weeks, and b) heating a cup of water for 4 minutes using a 1150W microwave oven.
Added by Diane C.
Step 1
Step 1: Calculate the cost of leaving the 40W kitchen light on for 3 weeks. Show more…
Show all steps
Your feedback will help us improve your experience
Sri K and 82 other Physics 101 Mechanics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
An electric stove with four burners and an oven is used in preparing a meal as follows. Burner 1: 20 minutes $\quad$ Burner 2: 40 minutes Burner 3: 15 minutes Burner 4: 45 minutes Oven: 30 minutes If each burner is rated at $1.2 \mathrm{kW}$ and the oven at $1.8 \mathrm{kW},$ and electricity costs 12 cents per $\mathrm{kWh}$ calculate the cost of electricity used in preparing the meal.
A full kettle of water takes 3 minutes to boil. At 7p per kWh, calculate how much this costs.
Rashmi P.
If electrical energy costs $\$ 0.12$ per kilowatt-hour, how much does it cost to (a) burn a $100-$ W light bulb for 24 $\mathrm{h}$ ? (b) Operate an electric oven for 5.0 $\mathrm{h}$ if it carries a current of 20.0 $\mathrm{A}$ at 220 $\mathrm{V}$ ?
Recommended Textbooks
University Physics with Modern Physics
Physics: Principles with Applications
Fundamentals of Physics
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD