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Perfluorooctane sulphonate (PFOS) is considered to be a persistent environmental pollutant, with a half life in natural water of approximately 41 years. It is resistant to hydrolysis, photolysis, and aerobic and anaerobic biodegradation. Explain why PFOS is so resistant to these processes.
Laser light of wavelength 632.8 nm falls normally on a slit that is 0.0250 mm wide. The transmitted light is viewed on a distant screen where the intensity at the center of the central bright fringe is 8.50 W/m2.
water is flowing in a pipe with a varying cross-sectional area and at all points the water completely fills the pipe.
A 52 kg woman and a 70 kg man stand 20.0 m apart on frictionless ice. How far from the man is their center of mass (CM)? If each holds one end of a rope, and the man pulls on the rope so that he moves 2.4 m, then how far from the woman will he be now..
A proton moving freely in a circular path perpendicular to a constant magnetic field takes 0.70µs to complete one revolution. Find the magnitude of the magnetic field
A thin rod of length 0.75m and mass 0.42kg is suspended freelyform one end. It is pulled to one side and then allowed to swinglike a pendulum, how far above that position the center of mass rises
at each moment during its flight a projectile has a velocity v and an acceleration a. the components of these variables
A 78kg astronaut is floating in space, he throws a 600 gram wrench at 20 m/s in the direction away from the space station so that he can begin floating towards space. How fast will he be traveling?
You walk from your house 0.25 miles West to Fred's house, What is your displacement from your initial position
a 0.07 kg bullet traveling at 577 ms hits a 5.6 kg block of wood and stays in the wood. what is the velocity of the
An airport luggage carousel has a slope of 15° down outward. What is the coefficient of static friction between the language and the carousel surface
A displacement vector lying in the xy plane has a magnitude of 50.0 meter and is directed at an angle 120.0 degree above the positive x axis. Find the rectangular components of the displacement vector
When a 58-g tennis ball is served, it accelerates from rest to a speed of 44 m/s. The impact with the racket gives the ball a constant acceleration over a distance of 38 cm. What is the magnitude of the net force acting on the ball?
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