the answer is A *but I am not sure*
Answer:
option A C E F are scalar quantity option B D Are vector quantity
Required Heat = Q
Q = Mass * specific heat of water * change in temp.
Q = 5g * 1g/cal*degC * 20degC
Q = 100 cal of heat is required
To convert calories to Joules,
1 cal = 4.184 Joules
100cal = 418.4 J of heat is needed
Answer:
For 1 week total cost will be equal to 0.2912
Explanation:
We have given power P = 40 watt
Light is on from 6 pm to 7 am
So total time = 13 hours
We know that energy is given by

So energy will be 
We have given cost per KWh is 0.08
So total cost per day will be = 0.08 ×0.520 = 0.0416
For 1 week that is for 7 day total cost will be = 7×0.0416 = 0.2912