![subject](/tpl/images/cats/fizika.png)
Tim is given a new quantity called Electrical Current. Which of the following questions could Tim ask to determine whether the quantitiy is a vector or a scalar?
O A Who discovered electric current?
O B. What are the base units of electric current?
OC. What is the symbol for electric current?
O D. Does electric current have a direction?
![ansver](/tpl/images/cats/User.png)
Answers: 1
Another question on Physics
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 06:20
Clothing made of several thin layers of fabric with trapped air in between, often called ski clothing, is commonly used in cold climates because it is light, fashionable, and a very effective thermal insulator. so it is no surprise that such clothing has largely replaced thickand heavy old-fashioned coats. (a) consider a jacket made of five layers of 0.1-mm-thick synthetic fabric (k = 0.13 w/m·°c) with 1.5-mm-thick air space (k = 0.026 w/m·°c) between the layers. assuming the inner surface temperature of the jacket to be 28°c and the surface area to be 1.25 m2, determine the rate of heat loss through the jacket when the temperature of the outdoors is 0°c and the heat transfer coefficient at the outer surface is 25 w/m2·°c. (b) what would your response be if the jacket is made of a single layer of 0.5-mm-thick synthetic fabric? what should be the thickness of a wool fabric (k = 0.035 w/m·°c) if the person is to achieve the same level of thermal comfort wearing a thick wool coat instead of a five-layer ski jacket?
Answers: 1
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 12:50
Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.
Answers: 2
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 18:30
Aheavy piece of hanging sculpture is suspended by a90-cm-long, 5.0 g steel wire. when the wind blows hard, the wire hums at its fundamental frequency of 80hz. what is the mass of the sculpture?
Answers: 3
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 23:30
Four 5-gram blocks of metal are sitting out in the sun and absorb the same amount of heat energy. use the following specific heat capacity data to determine which block will increase its temperature the most.
Answers: 2
You know the right answer?
Tim is given a new quantity called Electrical Current. Which of the following questions could Tim as...
Questions
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 07.12.2021 09:10
![question](/tpl/images/cats/mat.png)
Mathematics, 07.12.2021 09:10
![question](/tpl/images/cats/en.png)
English, 07.12.2021 09:10
![question](/tpl/images/cats/istoriya.png)
History, 07.12.2021 09:20
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 07.12.2021 09:20
![question](/tpl/images/cats/geografiya.png)
Geography, 07.12.2021 09:20
![question](/tpl/images/cats/istoriya.png)
History, 07.12.2021 09:20
![question](/tpl/images/cats/mat.png)
Mathematics, 07.12.2021 09:20
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 07.12.2021 09:20
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/obshestvoznanie.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 07.12.2021 09:20
![question](/tpl/images/cats/istoriya.png)
History, 07.12.2021 09:20
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/ekonomika.png)
![question](/tpl/images/cats/geografiya.png)
Geography, 07.12.2021 09:20
![question](/tpl/images/cats/mat.png)
Mathematics, 07.12.2021 09:20