You are playing a musical instrument with two strings. The linear mass density of string A is 2.1 g/cm and that of string B is 3.4 g/cm. Both strings are under the same amount of tension. You find that the frequency of the second harmonic on string A is the same as the frequency of the third harmonic on string B. What is the ratio of the length of string B, to that of string A (i.e., what is LB/LA)?

Consider the resonant oscillation shown in the image below, where a string of length 0.8 m and mass of 4.5 gr, has been stretched with an unknown tension. If the frequency of the transverse waves in the string is 440 Hz, what is the tension of the string in N?

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?

A 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)?

Which of the following diseases is more likely to occur through contact with contaminated water in industrialized countries than in non-industrialized countries?

Individuals who are allergic to penicillin generate ___ antibody against the antibiotic.

May 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.”  

The 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)….

This 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___”.

Food irradiation requires a nuclear reactor, which produces radioactive waste.