A full-term fetus typically has a mass of 3.50 kg. (a) What pressure does the weight of such a fetus create if it rests on the mother’s bladder, supported on an area of 90.0 cm2 ? (b) Convert this pressure to millimeters of mercury and determine if it alone is great enough to trigger the micturition reflex (it will add to any pressure already existing in the bladder).
Tuesday, January 23, 2018 Light: The Cosmic Messenger ASTR 203 - Light • A disturbance in the electromagnetic force thru which energy is transported • Dual Natures - Light as a wave fλ=c - Light as a particle E=hf photon • Light as a Wave - A wave is a pattern which is revealed by its interaction w/ particles • Wavelength: distance between adjacent crests • Amplitude: height of crest, how far crest is from the middle • Frequency: # of crests that pass thru a point each second. Measured in hertz (Hz) - All light travels w/ speed c=300,000 km/s - For a wave, its speed: s= fλ - Speed of light is a constant, c - For light: fλ=c - The higher f is, the smaller λ is, & vice versa - Our eyes recognize f (or λ) as