Question

How much heat is produced by a 2kw electric heater when it is operated for 30 minutes

Answer 1

Answer: 8.6*10^5 calorie.

Explanation:

Answer 2

Answer:

$\bold{36 \times 10^{5}}$J or 860 kcal is produced

Explanation:

According to formula we know that power = heat/ time. Here we need to calculate heat so we can this equation as follows- heat = power x time.

Here power is given P = 2kw and time is also given which is 30 mint.

First convert kilo watt into watt. 1 kw = 1000 watt so 2kw will be equal to 2000watt

Convert 30 minute into second = 30 minute = 30 x 60 = 1800 sec.

Heat = power x time  

2000 x 1800 = 36, 00000 joules or $36 \times 10^{5}$J or 860 kcal