Power Required for Typical Objects

Light

In order to estimate this value, I looked at the light bulb in my bedside lamp, that has a 60 Watt bulb inside of it. I'm pretty sure that this is the standard Wattage of a bulb, so I just estimated that a light needs 60 Watts.

TV

For the TV estimation, I researched how HD TVs work. I did not look up how much energy they use. So when I looked up how they work, the website said that the perimeter of the TV has LED lights. I decided to use the LED lights that we used in my estimation, so with 3.2 V x 0.02 A for the power of each bulb x 1200 bulbs in a 2 x 3 ft tv screen = approximately 80 Watts.  

Computer

For the computer, I looked at the bottom of my laptop which shows the voltage and current of my laptop. It said 19.5 v and 3.2 A, so I multiplied those together to find the power, P=IV which turned out to be about 70 Watts.


Car

For the car, I thought of the average horsepower of a car and then looked up the conversion of horsepower to watts. I figured an average car has around 250 horsepower, and the conversion is 1 hp = 746 Watts, so I multiplied 250 hp x 746 to get about 90,000 Watts.

Motorcycle

Here, my process was the same, but I estimated the average motorcycle to use 50 hp x 746 to get about 40,000 Watts.

Fridge

My process for the fridge is a bit iffy, but it was the best I could think of. So, the specific heat of air is about 1, so I knew that it took 1 joule to heat 1 gram of air 1 degree Celsius, so I figured that it would take the same amount of energy to decrease temperature, which I'm not sure if that even works. But I figured that I could think of the amount of air in the fridge in liters to figure out the grams of air in the fridge. Also I figured the difference in energy is about 16 degrees Celsius, bringing the room temperature of 21 to 4.4. So I figured that there was about 50 liters of air in the fridge. 16 x 50 = 800 Watts.
 

Oven

I used the same kind of process, but this time 10 liters of air x 150 degrees Celsius which is approximately 2,000 Watts.

Radio

For the radio, I looked at the bottom of it. It said 9 Volts and 2.5 amps, so I multiplied those two and got about 20 Watts.