How long must a welding machine with a 50 percent duty cycle cool off? 1 minute out of 10 4 minutes out of 10 5 minutes out of 10 6 minutes out of 10

## Step 1<br />The duty cycle of a welding machine is the percentage of time that the machine can operate continuously without overheating. In this case, the welding machine has a 50% duty cycle, which means it can operate for 50% of the time and then needs to cool off for the remaining time.<br /><br />## Step 2<br />To find out how long the machine needs to cool off, we need to calculate the remaining time. Since the machine operates for 50% of the time, it needs to cool off for the remaining 50% of the time.<br /><br />## Step 3<br />Given that the total time is 10 minutes, the machine operates for 5 minutes (50% of 10) and then needs to cool off for the remaining 5 minutes.