Which of the following best describes the electromagnetic spectrum?

a. includes a small band of visible radiation
b. involves only high frequency waves
c. consists mostly of wavelengths of colored light
d. travels in a pattern of particle motion

Abug is 12 cm from the center of a turntable that is rotating with a frequency of 45 rev/min . what minimum coefficient friction is required so that the bug stays on the turntable?

When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is

A5 foot by 5 foot box culvert is buried 6 feet beneath the surface of the ground. a crosssection of this very long culvert (into and out of the page) is illustrated below. assume that the soil in which the culvert is buried has the following properties: jt = 120 pcf, w = 12%, ko = 0.50, ka = 0.33, and kp = 3.00. calculate the total horizontal force per unit length of culvert (fh) felt on one of the vertical faces of the culvert.