KJ
6 Egy gyümölcs tömege 10 kg. Fajhője 3,8 ko"c
Aszalás kezdetén 40 °C-kal emelkedik a gyümölcs
hőmérséklete. Mennyi hő szükséges ehhez?

Heat required to raise the temperature of the fruits is 1520 kJ

Explanation:

As we know that heat required to raise the temperature of the substance is given as

here we know that

also we have

now by above formula

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.