4.) A 500-watt electric heater is used to change the temperature of 257 g of water...
5. (a) An insulated container contains 1kg of water and a 50 Watt heater. How long does it take the heater to raise the temperature of the water by 10°C? (b) How long would it take if the container was filled with 1kg of air instead of water? The specific heat of air is roughly 0.24cal/g. K.
4. An electric immersion heater normally takes 100 minutes to bring cold water in insulated container to a certain temperature, after which a thermostat swi heater off. One day the line voltage is reduced by 60% because of overload does the heating of water take now? Assume that the resistance of the heat does not change. switches th How long
An electric heater is used to boil small amounts of water and consists of a 10-Ω coil that is immersed directly in the water. It operates from a 120-V socket. How much time is required for the heater to raise the temperature of 0.38 kg of water from 29 °C to the normal boiling point? Take the specific heat capacity of water to be 4186 J/(kg·C°).
A 50-gallon electric water heater is used to heat tap water with an initial temperature of 15oC. The heating level is set at a maximum while several people are taking their showers. If the maximum heating level of the heater is 7.5kW of electricity and the water use rate is 3 gal/min, what is the temperature of the water exiting the heater? Assume that the system is at steady state and the heater is 100% efficient; that is it is...
3. a) An electric water heater uses 5500 W (240 V) of electrical power. It has a capacity of 40 gallons (150 liters or 150 kg). If the initial temperature of the water in the water heater is 20° C, how long will it take to heat the water to a final temperature of 60° C at 100% efficiency? b) How long will it take to heat the water to a final temperature of 60°C at 80% efficiency? c)If electrical...
A small electric immersion heater is used to heat 57 g of water for a cup of instant coffee. The heater is labeled “190 watts” (it converts electrical energy to thermal energy at this rate). Calculate the time required to bring all this water from 24°C to 100°C, ignoring any heat losses. (The specific heat of water is 4186 J/kg·K.) How can I solve this problem?
How long does a 57 kW water heater take to raise the temperature of 110 L of water from 24°C to 37°C? The specific heat of water is 4186 J/kg·K. The density of water is 1.00 g/cm3.
How long does a 65 kW water heater take to raise the temperature of 160 L of water from 24°C to 37°C? The specific heat of water is 4186 J/kg·K. The density of water is 1.00 g/cm3
How long does a 64 kW water heater take to raise the temperature of 150 L of water from 22°C to 38°C? The specific heat of water is 4186 J/kg·K. The density of water is 1.00 g/cm3.
The 120 V electric heater in a coffee maker has a resistance of 15 Ω. How long will it take for this heater to raise 7 cups (1540 g) of water from 20∘C to the ideal brewing temperature of 90∘C? Express your answer in minutes.