The lowest frequency that can be made by a guitar string is called the ________ (2 words).
What will be an ideal response?
fundamental frequency
first harmonic
fundamental harmonic
1st harmonic
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Polarization: For a beam of light, the direction of polarization is defined as
A. the beam's direction of travel. B. the direction of the electric field's vibration. C. the direction of the magnetic field's vibration. D. the direction that is perpendicular to both the electric and magnetic field vectors.
A ray of light in plastic reaches the edge of the plastic. The medium surrounding the plastic is air and the angle of incidence is larger than the critical angle. What will happen?
A. The ray will refract out of the plastic, bending toward the normal line B. The ray will experience total internal reflection, the angle of reflection being smaller than the angle of incidence C. The ray will experience total internal reflection, the angle of reflection being larger than the angle of incidence D. The ray will refract out of the plastic, bending away from the normal line E. The ray will experience total internal reflection, the angle of reflection equaling the angle of incidence
Why might increasing the temperature alter the rate of a chemical reaction?
A) The molecules will have a higher kinetic energy and bump into one another harder. B) The molecules are less reactive at higher temperatures. C) The molecules will more likely combine with other atoms at high temperature to save space. D) The density decreases as a function of temperature and this leads to an increase in volume which drops the rate of reaction. E) none of the above
Most of the gold, platinum, and rare-earth elements present in the universe are created by neutron star mergers
Indicate whether the statement is true or false