When Cassini entered orbit around Saturn, it caused the planet's orbit to change
Indicate whether the statement is true or false
TRUE
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Composite _________is produced by laying fibers in random directions in a plane.
Fill in the blank(s) with the appropriate word(s).
Radio telescopes are generally ________ than visible-light telescopes.
A) much larger B) much smaller C) much more expensive D) located at much higher altitudes
While examining the spectrum of a galaxy you find all the hydrogen lines are shifted to longer wavelengths. This galaxy is
A) moving away from us. B) moving towards us. C) expanding explosively. D) blue shifted. E) not forming new stars.
A 100 kg crate is attached to a rope wrapped around the inner disk as shown. A person pulls on another rope wrapped around the outer disk with force F to lift the crate
What force F is needed to lift the crate 2 m?