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Answer the following statement true (T) or false (F)
True
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A 10.0-kg box starts at rest and slides 6.0 m down a ramp inclined at an angle of 10° with the horizontal. If there is no friction between the ramp surface and crate, what is the velocity of the crate at the bottom of the ramp? (g = 9.8 m/s2)
a. 6.1 m/s c. 10.7 m/s b. 3.5 m/s d. 4.5 m/s
An object is placed 100 cm in front of a diverging lens with a focal length of magnitude 25 cm. A converging lens having a focal length of magnitude 33.33 cm is placed 30 cm past the first lens. Where is the final image formed?
A) 30 cm after the second lens B) 20 cm in front of the first lens C) 3.0 meters before the second lens D) 100 cm after the second lens E) 3.0 cm before the second lens
The Milky Way and other spiral galaxies ____
a. must have formed recently, because they contain young stars b. formed spiral arms as the result of major collisions with other galaxies c. created their disks through the process of galactic cannibalism d. must be very old because they contain so much gas and dust e. cannot maintain their disk structure if they suffer a major collision
Briefly summarize current knowledge about the term Np in the equation Number of Civilizations = Np × flife × fcivilization × fnow
What will be an ideal response?