The capacity of a storage battery, such as those used in automobile electrical systems, is rated in ampere-hours (a? h). a 50 a? h battery can supply a current of 50 afor 1.0 h, or 25 a for 2.0 h, and so on. a) what total energy can be supplied by a 13v , 60a? h battery if its internal resistance is negligible? answer= jb) what volume (in liters) of gasoline has a total heat of combustion equal to the energy obtained in part (a)? (see section 17.6; the density of gasoline is 90 kg/m 3.)answer= lc) if a generator with an average electrical power output of 0.45 kw is connected to the battery, how much time will be required for it to charge the battery fully? answer= h

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?

Match these items. 1. coulombs __force 2. ohms __emf 3. centimeters __resistance 4. newtons __charge 5. volts __length

Mackinzie walks 4 blocks west, then 2 blocks south, then 4 blocks east, and,finally, 1 block south. what is the magnitude of her total displacement duringthis walk (in blocks)?