If the fuel he carries produces 36 kJ of heat per gram when it burns, how much fuel should he carry? (For the sake of simplicity, assume that the transfer of heat is 100 %% efficient.)

As we know that

Q = mc(T2 - T1)

Q = (2.9 kg) x (1000 g/1 kg) x (4.18 J/g*oC) x (100 oC - 24 oC)  

Q = 921272 J

so, 921272 J x (1 kJ/1000 J) x (1 g/36 kJ) = 2.6 x 101 g

when the use of electricity burdens the fuse and miniarure circuit beakers and there is a possibility of a fuse then they automatically cut off the electricity supply to your homes and after you fix the problem u jzt switch it on and it continues the supply of electricity to ur homes

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.