Answer: 9300 kcal
Explanation: Given: Latent heat of fusion of aluminum is 93 kcal/kg.
That is for melting 1 kg of aluminium at 660 amount of heat required is = 93kcal
Thus for 100 kg of aluminium at 660 amount of heat required is=
Thus the amount of energy needed to melt 100 kg of aluminum at the melting point is 9300 kcal.
Answer:
1000j
Explanation:
work done = force x distance
w = 5 x 10 x 20 = 1000joules
Cellular base station transmit:
Wavelength = 0.34961 meter . . . . . Frequency = 857.505 MHz
Phone transmit:
Wavelength = 0.36455 meter . . . . . Frequency = 822.363 MHz
Difference in frequency = 35.14 MHz