If a 9-Watt light bulb is on for 3 seconds, how much energy did it put out? A 1/3 of a Joule 3 Joules 27 Joules 3 degrees Kelvin __ 27 degrees Kelvin

## Step 1
The power of a device is the rate at which it consumes energy. In this case, the power of the light bulb is given as 9 Watts. This means that the bulb consumes 9 Joules of energy every second.

## Step 2
The light bulb is on for 3 seconds. Therefore, the total energy consumed by the bulb is the product of the power and the time.

### **Energy = Power * Time**

## Step 3
Substitute the given values into the formula.

### **Energy = 9 Watts * 3 seconds**