The viscosity n of a liquid can be calculated using equation: n=bpt, where b is calibration constant of the viscometer, pis the density of the liquid and t is time of flow through the viscometer. in one experiment, water was used to calibrate the viscometer at 25.0°c, and the time of flow was measured as 200.3+0.2 s. at 25.0°c, the density and viscosity of water are 0.99708 g. mland 8.909 x 10-g. cms, respectively. using the same viscometer, the time of flow was 425.6+0.5 s at 25.0°c for an unknown liquid with density 0.85667 g. ml. determine constant b and the viscosity of the unknown liquid with error analysis.

Starting with only the balmer series light (visible light), how could we ensure that the solar panels generate a current that mark can use for his power station? a)by gradually increasing the brightness (amount) of light that we shine on it. b)by gradually increasing the frequency of the light we shine on it. c)by gradually increasing the wavelength of the light that we shine on it.

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz. what wavelength is produced?

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?