Thursday

November 27, 2014

November 27, 2014

Posted by **Anonymous** on Monday, February 6, 2012 at 11:37am.

Answer in units of J

How much of energy is used if the appliance is an electric oven that draws 70.0 A of current?

Answer in units of J

How much energy is used if the appliance is a television with a resistance of 10.0 ?

Answer in units of J

Any help or information on how to solve these would be greatly appreciated, Thanks!

- Physics -Electricity -
**Damon**, Monday, February 6, 2012 at 11:49amwell, first figure out the number of seconds

24 h * 60 min/h * 60 s/min = 8.64 *10^4 s

a Watt is a Joule/second so Joules = Watts * seconds

30 *8.64 * 10^4 = 2.59*1^6 Joules

watts = Volt * amps

watts = 314 * 70

Joules = 314*70 * 8.64*10^4

watts = V^2/r = (314)^2/10 ohms

Joules = (314^2/10) *6.64*10^4

314 is a VERY strange voltage for appliances.

- Physics -Electricity -
**Anonymous**, Monday, February 6, 2012 at 11:56amLife saver, thanks!

**Answer this Question**

**Related Questions**

university, physics - A coffee maker is rated at 1200 W, a toaster at 1100 W, ...

Physics - An Electricity account shows that a household has used 1400 units of ...

Physics - An Electricity account shows that a household has used 1400 units of ...

Electricity - Refrigerators requires a lot of electricity and uses the most ...

algebra - Your monthly commission as an appliance sales person is represented by...

Algebra - Your monthly commission as an appliance sales person is represented by...

Physics - 1)A 2.0-V battery is connected in a circuit with an ammeter and an ...

physics(electricity) - A 9V battery has an electric potential difference of 9V ...

physics - How much kinetic energy is gained by an electron that is allowed to ...

Physics - A battery with an emf of 10.3 V and internal resistance of 1.03 Ω...