4.A hot-water heater is rated at 4500 W and operates at 240 V. (a) Find the resistance in the heating element and the current. (b) How long does it take to heat 125 L of water from 20.0°C to 50.0 °C, neglecting conduction and other losses? (c) How much does it cost at P5.50 per KWh?
4.A hot-water heater is rated at 4500 W and operates at 240 V. (a) Find the resistance in the heating element and the current. (b) How long does it take to heat 125 L of water from 20.0°C to 50.0 °C, neglecting conduction and other losses? (c) How much does it cost at P5.50 per KWh?
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Transcribed Image Text:4.A hot-water heater is rated at 4500 W and operates at 240 V. (a) Find the
resistance in the heating element and the current. (b) How long does it take to
heat 125 L of water from 20.0°C to 50.0 °C, neglecting conduction and other
losses? (c) How much does it cost at P5.50 per KWh?
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