Determine the energy (in mega joules) required to use an oven at full rated capacity of 4kW, and a microwave with a rating of 1000W, for 30 minutes each.
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Determine the energy (in mega joules) required to use an oven at full rated capacity of 4kW, and a microwave with a rating of 1000W, for 30 minutes each.
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- What load may be used for an electric range rated at not over 12 kW? (Table 220.55) _____Which of the following is the simplest atom that exists? a. carbon b. hydrogen c. oxygen d. sulfurEstimate the cost of cooking a turkey for 3.2 hours in an oven that operates continuously at 16.6A and 183V. If the energy is purchased at an estimated price of 7.8 dollar cents per kilowatt hour.
- determine the power dissipated when a curren of 10 mA flows through an appliance having a resistance of 8 K ohmiosWhat is the thermal efficiency of a coal fired thermal plant having a coal consumption of 0.48 kg/kWh and the calorific value of coal used is 6200 kcal/kg?Compute for the time it takes for an electric stove to consume 60 kJ for a 220-V line drawing 30 A of current.
- Compute for the total energy in kilojoules supplied by the source in the circuit above if the circuit is left on for two hours.An electric heater having power rated 1000W connected to a 240V supply for 10minutes. a) calculate the conductance of the heater element.b) Find the nett charge flowing in the heater element.c) Calculate the no. of free electron that represent for that amount charge obtained.A microwave oven is connected to a 250V supply for 2 hours with a power rating of 1.8kW. Find the total electrical energy consumption and the current rating of the microwave oven?
- ). A laptop computer consumes an average power of 20 W. The rechargeable battery has a voltage of 12 V and capacity of 5800 mAh. How long can the laptop run on a single battery charge?A 3 ohm heater takes 6 amperes while submerged in 1200 grams of water contained in a vessel with a water equivalent to 200 grams. What is the efficiency of the system if the time required for the temperature to change by 70 degrees Celsius is 3.95 hours? 80% 70% 60% 50%A 60 MW thermal station has overall efficiency of 30%. If coal for the station has an energy of 6950 kcal per kg, calculate coal usage per kWh
