ROI stands for return-on-investment.
Answer the following statement true (T) or false (F)
True
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Waves on a String: A crane lifts a 2500-kg beam using a steel cable whose mass per unit length is 0.650 kg/m. What is the speed of transverse waves on this cable if the upward acceleration of the beam is a steady 3.00 m/s2?
A. 194 m/s B. 578 m/s C. 1220 m/s D. 1880 m/s E. 222 m/s
Cartridge brass can be extensively deformed into thin-walled sections because it does not _________-harden.
Fill in the blank(s) with the appropriate word(s).
One of the absorption lines of hydrogen has a rest wavelength of 656 nm (at rest means with respect to the observer, like in a lab). You observe several stars and measure the wavelength of this same hydrogen absorption line in each star
Based on the measured wavelength of this line, which star is moving towards the Earth the fastest? A) 670 nm B) 640 nm C) 656 nm D) 630 nm E) 680 nm
Which of the following radiations has the greatest frequency?
a. Infrared b. Visible c. Ultraviolet d. X-rays