A horizontal mass-spring system is in simple harmonic motion, and the position of the mass can be modeled as x(t) =[0.3m] sin([2s-1]t+π/4), where x is in meters and t is in seconds. At t= 4 s, what is the ratio of the kinetic energy of the mass to its potential energy, K/U?
Read DetailsA solid disk of diameter 16 cm and mass 10 kg is connected to a pivot at the edge of the disk. When the mass is displaced slightly from the equilibrium position and released, what is the angular frequency of the resulting oscillating motion (in rad/s)?
Read DetailsMay 19, 2016 (CNN) “Small turtles may be cute but they are making people sick. That was the warning from U.S. federal health officials on Wednesday. Between January 2015 and April of this year there have been four separate multi-state outbreaks of _______ associated with touching turtles smaller than four inches long.”
Read DetailsThe Alaskan Iditarod dog-sled race commemorates the emergency delivery of a “life-saving” serum that was needed to treat children sick with diptheria in Nome, Alaska in 1925. (Serum is the clear liquid that can be separated from clotted blood.) The “life-saving” serum was a(n)….
Read DetailsThis article below refers to the antibody stimulated through genital contact that helps protect against respiratory diseases. This is ____, the antibody found in secretions of the mucous membranes.Have Sex, Feel (and look) Better “Good lovin’ may have benefits beyond the obvious, studies show. Regular sex may ward off colds and flu, suggests a study from Wilkes University in Wilkes–Barre, Pennsylvania. Subjects who have sex once or twice a week had higher levels of the antibody immunoglobulin ___ than those who connected less frequently. Researchers believe the sex-induced release of feel-good endorphins may boost Ig___”.
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