Considering a 700-W toaster, how much energy (in Joules) would be needed to toast a slice of bread for 2.0 minutes?
a Watt is a Joule per second
700 W * 120 s = ? J
To calculate the amount of energy needed to toast a slice of bread, we can use the equation:
Energy (Joules) = Power (Watts) x Time (seconds)
Given that the toaster has a power of 700 Watts and the toasting time is 2.0 minutes (which is equal to 120 seconds), we can substitute these values into the equation:
Energy (Joules) = 700 Watts x 120 seconds
Now we can calculate the energy needed:
Energy (Joules) = 84,000 Joules
Therefore, it would require 84,000 Joules of energy to toast a slice of bread for 2.0 minutes in a 700-W toaster.
To calculate the energy required to toast a slice of bread, we need to use the formula:
Energy (in Joules) = Power (in Watts) × Time (in seconds)
Given that the toaster has a power rating of 700 Watts and the toasting time is 2.0 minutes, we need to convert the time to seconds:
2.0 minutes = 2.0 × 60 seconds = 120 seconds
Now we can calculate the energy required:
Energy (in Joules) = 700 Watts × 120 seconds = 84,000 Joules
Therefore, it would require 84,000 Joules of energy to toast a slice of bread for 2.0 minutes using a 700-Watt toaster.