How are electromagnetic waves different from mechanical waves? (2 points)
a
Electromagnetic w...
How are electromagnetic waves different from mechanical waves? (2 points)
a
Electromagnetic waves are all high frequency; mechanical waves are all low frequency.
b
Electromagnetic waves can travel through a vacuum; mechanical waves require a medium.
c
Electromagnetic waves are visible; mechanical waves are invisible.
d
Electromagnetic waves always reflect; mechanical waves always refract.
Answers: 2
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How is acceleration calculated? a. initial velocity - final velocity / timeb. initial velocity + final velocity / timec. final velocity - initial velocity / timed. final velocity / timele select the best answer from the choices provided0oood00save and exitnextmark this and return
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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.
Answers: 1
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