# Physical Science

posted by .

Julia and Wayne heat their house during the winter with an electric heater. The thermostat on the heater is set to 20 °C and the thermostat is cycling on and off as it keeps the room temperature stable. Julia walks out of the room leaving the light on. Wayne tells Julia that she is wasting electricity. Julia says that she’s not.

• Physical Science -

She is probably not, as the energy in the light bulb is just adding to the heat in the room, causing the heater to cycle on less often.

## Respond to this Question

 First Name School Subject Your Answer

## Similar Questions

1. ### science

How is homeostasis maintained in the digestive system?
2. ### physcial science

Does a 5000-watt heater use twice the energy of a 2500-watt heater. What calculation do I need to do to compare these and answer the question?
3. ### AP Physics

You go to kitchen to boil water. You pour 280 gram of water to a container, and put the container on a 293 W electric heater. Assume that all the heat from the heater is used to heat the water. The specific heat of water is 4.19 J/g …
4. ### College Physics

On average, an electric water heater operates for 3.4h each day. If the cost of electricity is \$0.3 kWh, what is the cost of operating the heater during a 30-day month?
5. ### Physics

24 kg of water are heated by a thermostatically controlled 4Kw electric heater. The thermostat switches the heater on at 60 degree centigrade and off at 65 degree centigrade. If the time between switching off and switching on is 3.0 …
6. ### Physics

A 1500 W room heater is used daily for 4 hours during winter. If the cost per kWh is \$0.5, what is the monthly (30 days) expense in using the room heater?
7. ### Math

For each 10-degree adjustment on your water heater thermostat, you can reduce carbon dioxide emissions by 500 pounds a year. By how many pounds will you reduce your carbon dioxide footprint if you turn down your water heater thermostat …
8. ### thermodynamics

Julia and Wayne heat their house during the winter with an electric heater. The thermostat on the heater is set to 20°C and the thermostat is cycling on and off as it keeps the room temperature stable. Julia walks out of the room …
9. ### Science

in a homes central heating system when the room temperature measured by the thermostat reaches a set value the thermostat sends a message to the heater and the heater switches off These action are an examples of a
10. ### Science

In a home's central heating system when the room temperature measured by thermostat reaches a set value, the thermostat sends a message to the heater, and the heater switches off. These actions are an example of: A. a model. B. feedback. …

More Similar Questions