Physics, 22.07.2019 21:30 kamayabrown668
A120.0-v motor draws a current of 7.00 a when running at normal speed. the resistance of the armature wire is 0.720 ω. (a) determine the back emf generated by the motor. (b) what is the current at the instant when the motor is just turned on and has not begun to rotate? (c) what series resistance must be added to limit the starting current to 15.0 a?
Answers: 1
Physics, 22.06.2019 04:50
Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves
Answers: 2
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
Physics, 22.06.2019 08:30
Pl asaaap ! match the term to the correct description. a type of wave that transfers energy where the particles in the medium move perpendicular to the direction in which the energy is traveling. a type of wave that transfers energy where the particles in the medium move parallel to the direction in which the energy is traveling. movement that is back and forth, like an equal sign = a type of wave that transfers energy where the particles in the medium move in a circle motion while the energy travels left or right. movement that is like a t transfers energy from one location to another 1. wave 2. parallel movement 3. perpendicular movement 4. transverse wave 5. longitudinal wave 6. surface wave
Answers: 1
Physics, 22.06.2019 15:50
An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )
Answers: 1
A120.0-v motor draws a current of 7.00 a when running at normal speed. the resistance of the armatur...
Geography, 03.06.2021 07:10
Computers and Technology, 03.06.2021 07:10
Arts, 03.06.2021 07:10
Mathematics, 03.06.2021 07:10
Mathematics, 03.06.2021 07:10
History, 03.06.2021 07:10
English, 03.06.2021 07:10
Mathematics, 03.06.2021 07:10
English, 03.06.2021 07:10