Make I the subject
E=VIt...
![ansver](/tpl/images/cats/User.png)
Answers: 2
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Physics
![question](/tpl/images/cats/fizika.png)
Physics, 21.06.2019 16:30
In this experiment, you will use a track, a toy car, and some washers to explore newton’s first two laws of motion. you will make observations and collect data regarding the motion of these objects. in the space below, write a general scientific question that you will answer by doing this experiment.
Answers: 1
![question](/tpl/images/cats/fizika.png)
Physics, 21.06.2019 17:00
Why is alternating current more effective at long–distance travel than direct current? a. the power lines are made out of conductors. b. transformers increase or decrease voltage as needed. c. the ac generator is more efficient. d. ac has lower voltage than dc.
Answers: 1
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 04:30
Erosion of the beach is normally a slow process. however, in certain situations, large chunks of shore may wash out to sea. what could cause this to happen?
Answers: 3
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 08:00
Aheat engine running backward is called a refrigerator if its purpose is to extract heat from a cold reservoir. the same engine running backward is called a heat pump if its purpose is to exhaust warm air into the hot reservoir. heat pumps are widely used for home heating. you can think of a heat pump as a refrigerator that is cooling the already cold outdoors and, with its exhaust heat qh, warming the indoors. perhaps this seems a little silly, but consider the following. electricity can be directly used to heat a home by passing an electric current through a heating coil. this is a direct, 100% conversion of work to heat. that is, 19.0 \rm kw of electric power (generated by doing work at the rate 19.0 kj/s at the power plant) produces heat energy inside the home at a rate of 19.0 kj/s. suppose that the neighbor's home has a heat pump with a coefficient of performance of 4.00, a realistic value. note: with a refrigerator, "what you get" is heat removed. but with a heat pump, "what you get" is heat delivered. so the coefficient of performance of a heat pump is k=qh/win. an average price for electricity is about 40 mj per dollar. a furnace or heat pump will run typically 200 hours per month during the winter. what does one month's heating cost in the home with a 16.0 kw electric heater? what does one month's heating cost in the home of a neighbor who uses a heat pump to provide the same amount of heating?
Answers: 2
You know the right answer?
Questions
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/geografiya.png)
Geography, 02.08.2019 08:10
![question](/tpl/images/cats/istoriya.png)
History, 02.08.2019 08:10
![question](/tpl/images/cats/mat.png)
Mathematics, 02.08.2019 08:10
![question](/tpl/images/cats/geografiya.png)
Geography, 02.08.2019 08:10
![question](/tpl/images/cats/mkx.png)
![question](/tpl/images/cats/istoriya.png)
History, 02.08.2019 08:10
![question](/tpl/images/cats/mat.png)
Mathematics, 02.08.2019 08:10
![question](/tpl/images/cats/mat.png)
Mathematics, 02.08.2019 08:10
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/biologiya.png)
Biology, 02.08.2019 08:10
![question](/tpl/images/cats/mat.png)
Mathematics, 02.08.2019 08:10
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 02.08.2019 08:10
![question](/tpl/images/cats/biologiya.png)
Biology, 02.08.2019 08:10
![question](/tpl/images/cats/mat.png)
Mathematics, 02.08.2019 08:10
![question](/tpl/images/cats/mat.png)
Mathematics, 02.08.2019 08:10