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A transparent oil with index of refraction 1.28 spills on the surface of water (index of refraction 1.33), producing a maximum of reflection with normally incident green light (wavelength 500 nm in air). Assuming the maximum occurs in the first order, determine the thickness of the oil slick. nm
A person wears a hearing aid that uniformly increases the sound level of all audible frequencies of sound by 27.6 dB. What is the intensity delivered to the eardrum
coming back to your room one night, you see your roommate balancing an apple on top of their head. what is the corresponding Newtons third law interaction pair force
A series R-L-C circuit is connected to a 170 Hz ac source that has Vrms=80.0 V. What average power is delivered to the circuit by the source
Gold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber. (a) If a sample of gold with a mass of 7.948 g, is pressed into a leaf of 1.547 m thickness.
A man is holding an 8.00-kg vacuum cleaner at arm's length, a distance of 0.550 m from his shoulder. What is the torque on the shoulder joint if the arm is horizontal
80 cm3 of water takes 12 min to cool from 40?C to 15?C in a draft; it is contained in a copper calorimeter of mass 150 g, Calculate the specific heat of the suspension in SI units
A 30,000-kg freight car is coasting at 0.850 m/s with negligible friction under a hopper that dumps 110,000 kg of scrap metal into it. What is the final velocity of the loaded freight car
A penny has a mass of 2.50 g, a diameter of 19.55 mm, find the density of the material from which the penny is made
A toddler, initially standing next to his father in the front yard, walks slowly away from his dad in the direction of 30.0? N of E for 3.50 meters. How far was the distance he walked due south
A 120 kg hiker puts on a pair of snowshoes that have an effective combined surface area of 0.80 square meters. How much pressure does he exert on the snow
The coefficient of kinetic friction between block and ramp
Two harmonic oscillators A and B, of mass m and spring constant ka and kbm respectively, are coupled together by a spring of spring constant kc. Find the normal frequencies w' and w'' and describe the normal modes of oscillation if kc^2 = kakb.
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