Question

The power of the heater is 50 W. The mass of the sand in the cup is 550 g. The initial temperature of the sand is 20 °C. The heater is switched on for 2.0 minutes. The temperature is recorded until the temperature stops increasing. The highest temperature recorded by the thermometer is 33 °C. (a) Calculate the energy supplied by the heater.

Answer 1

Answer:

6000J

Step-by-step:

To calculate the energy supplied by the heater, we can use the formula:

Energy = Power x Time

where power is measured in watts (W) and time is measured in seconds (s). However, in this problem, we are given the power in watts and the time in minutes, so we need to convert the time to seconds before we can use the formula.

1 minute = 60 seconds

Therefore, 2.0 minutes = 2.0 x 60 seconds = 120 seconds

Now we can use the formula to calculate the energy supplied by the heater:

Energy = Power x Time

Energy = 50 W x 120 s

Energy = 6000 J

Therefore, the energy supplied by the heater is 6000 joules (J).

Hope this helps!