1. An electric boiler rated 2000 Watts connected to 220 volts source raised the temperature of 6 kg mass of water from 5 0C to 100 0C. Assuming no energy is lost to the surrounding (including the container), calculate The cost of electricity incurred if 1 UNIT of electricity cost GHc 0. 20 the resistance of the boiler [Specific Heat Capacity of water is 4200 J/Kg/0C]

Explanation:

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ι вєℓιєνє ιт ιѕ тнє fιяѕт ¢нσι¢є(α.)

нє ѕнσυℓ∂ ѕмιℓє ρσℓιтℓу αи∂ ѕρєαк тσ тнє ρєяѕσи ωнσ ιѕ ιитєяяυριиg αfтєя тнє ∂ιѕ¢υѕѕισи

нσρє ι ¢συℓ∂ нєℓρ.

1.195000

explanation:

total mass=0.0117+0.0137+0.0881+0.0111

total mass= 0.01172kg

total velocity = 0.283-0.743+0.871-0.799+0.155+0.637+0.301=0.102

momentum=mv=0.1172*0.102=1.195000//