kWh Amount of kilowatts used times the amount of time used in hours. Example: 500 watts used for 30 minutes =.5kW x.5 hours =.25 kWh.

Slides:

Advertisements

Similar presentations

Electricity & Safety in the Home

Advertisements

Analysing energy graphs Learning Objective Be able to analyse a graph and relate the key features to real world events Brilliant outcome.

Lesson 3: Buying Electricity.  MUST understand how electric current transfers energy  SHOULD calculate the cost of energy used  COULD use appropriate.

Electrical energy consumption Section 9. Lighting 40 Watts 100 Watts 60 Watts.

Electrical Energy Use in the Home

Understanding Electricity. Electric Current Electric current: the flow of electrons through a conductor (like silver, copper, gold, or aluminum) Electrons.

Electrical Energy Use in the Home

Household Electricity

Connect the appliance to the power rating using an arrow! Appliance Kettle Iron Television Hair dryer Power rating (W) 1100W 65W 1800W 2000W.

Power and Energy. Power Power means work over a time period Units = Watts Electric power is measured in Watts.

Environmental Science Mr. Hartley. What the heck is a kilowatt hour? Before we see how much electricity costs, we have to understand how it's measured.

Power Calculations Noadswood Science, 2011.

Measuring Electrical Energy Lesson 11. Measuring Electrical Energy What is Energy? Energy- The ability to do work Electrical Energy- The energy transferred.

 POWER: the rate of change in energy; also the rate at which work is done or energy is transformed  JOULE (J): the unit for measuring energy  WATT.

LAST SECTION OF CHAPTER 12 AND OF THE ENTIRE ELECTRICITY UNIT Reducing Our Electrical Energy Consumption.

Learning Outcomes Distinguish between Power and Energy. And use the equation Energy = Power x Time Use the equations: Units Used (kWh) = Power (kW) x Time.

Generating and Using Electricity

Using Electrical Formulae Using the formulae you have been taught (V=IR, P=VI, Energy in kWh = kilowatts x hours) first of all work out which formula you.

Understanding Electricity

Understanding Electricity. Electric Current Electric current: the flow of electrons through a conductor (like silver, copper, gold, or aluminum) Electrons.

Power. Your Utilization of Electricity Have you ever heard the word Watt before? Have you ever used the word Kilowatt before? When? When a person is speaking.

Buying Energy20 Apr Class listSeating Plan Buying the POWER!!!! 20 Apr 2012.

ELECTRICITY: CHAPTER 7 Section 3 B. Protecting the Building  Two ways to control current in wiring  Fuse Contains a small wire that melts if too much.

ENERGY.  Energy is measured in Joules (J)  A joule is a small unit of energy NOT JEWELS like these -> JOULES.

Paying for Electricity How much does it cost to watch T.V. for 2 hours?

Units Of Electricity Ashfield Direct Learning Holly Millar Ks4 Energy.

 Amps  Volts  Watts Electricity is priced and sold by the Kilowatt- hour. (kilo-1000) If you use 1000 watts of electricity for 1 hour, you use 1 kwh.

Electrical Power & Energy Chapter 7-3. Electrical Power F Power is the rate at which work is done F Electrical energy is easily converted into other forms.

Electrical Efficiency. Electrical Efficiency Electrical Energy Consumption: the amount of electrical energy used.

5.10 Energy and Power  Energy (E) the ability to do work Measured in Joules (J)  Power (P) the amount of work that can be accomplished in a certain amount.

Calculate the missing quantities for the circuit below.

Power and Energy. Power Electric power - the rate at which electric energy is transformed into another form of energy such as light or heat. P=IV P =

Do Now (10/10/13): What do Watts measure?

Electrical Power & Efficiency.  I will be able to calculate cost to operate and percent efficiency of various devices.

Power Chapter 5.6 WOD is underlined. Question A 2400 kg car can slow from 10 m/s to rest in 3.2 meters.If the car has traditional friction brakes, what.

Power. Your Utilization of Electricity Have you ever heard the word Watt before? Have you ever used the word Kilowatt before? When? When a person is speaking.

Calculating Energy Use and Converting Units Chapter 2.

Electric Power Lesson 2.5. Key Concepts How do you calculate electric power? What factors are used to determine how people pay for electrical energy?

ENERGY. Energy  Energy is measured in Joules (J)  A joule is a small unit of energy NOT JEWELS like these -> JOULES.

Topic 7: Measuring Electric Power. Getting electricity to your home Power generating station  transmission lines  home Step- up transformer Step- down.

Energy Consumption Energy consumption is measured in kilowatt. hours. A kilowatt hour is the amount of energy being consumed per hour. –Energy (kwh) =

By becoming energy aware at home and at school you can save lots of money.  The first step to saving energy is knowing how much you use in the first.

Buying electricity. Calculating the units of electricity The amount of electrical energy (i.e. the amount of electricity) used by an appliance depends.

Understanding Electricity. Electric Current Electric current: the flow of electrons through a conductor (like silver, copper, gold, or aluminum) Electrons.

Energy Calculations Revision Energy = Power x Time (Joule) (Watt) (Second) Energy Power x Time Example 1: How much energy does a 40 Watt bulb use in 2.

Electrical Power and Cost of Electricity

Power and Energy Energy Power

7. Power in electric circuits

Energy Consumption: CO$T.

Power in DC Circuits.

Efficiency Hair dryer TV Lamp Toy Radio Heater Answer

The Cost of Electricity

Using Electrical Formulae

Electrical Power & Energy

Calculating Energy Costs

By: Michelle, Yeovani, Jalen

Electrical Calculations

1 You see a leaf falling to the ground with constant speed. When you first notice it, the leaf has initial total energy PEi + KEi. You watch the leaf.

Electricity Calculations:

Warm up for 1/5-1/6 PHONES UP! You will need INB.

Power Consumption & Cost

P1 Energy and Power.

The Cost of Electrical Energy

Energy and Power.

Notes 7.3 : Calculating Electric Power + Electrical Energy

Presentation transcript:

kWh Amount of kilowatts used times the amount of time used in hours. Example: 500 watts used for 30 minutes =.5kW x.5 hours =.25 kWh

Hair dryer uses 1400 watts. Takes 1 hour a day for every day of the year. The cost is $0.10 for every kWh used. What is the cost per year? 1400W * 1 hr * 1 kW * 365days * $0.10 day * 1000W* 1 yr * kWh

Mom wants you to spend 1 hour every day using a 1500 W vacuum. You want to spend 1 hour every month. At $0.10 per kWh, how much could you save? MOMS 1500W* 1 hr * 1 kW * 365 days * $0.10 day* 1000W * 1 yr * kWh YOURS 1500W * 1hr * 1kW * 12mo. * $0.10 mo *1000W* 1yr * kWh Find difference.

You use 10,000 kWh every year until you buy a solar water heater that saves you 20% of your total consumption. How much $ do you save in 5 years at the rate of $0.10 per kWh $1,000 savings in 5 years

A town uses 800,000 kWh every year. A methane capturing landfill can produce 10 kWh every day for each acre. How many whole acres is needed to supply the town? Answer = 220 acres