The ____ of a planet is the region around the planet where the magnetic field is able to deflect the solar wind and other charged particles
a. aurora
b. magnetosphere
c. hydrosphere
d. corona
e. Schwarzschild radius
B
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Spherical Mirrors: An object that is 4.0 cm tall is placed 15 cm in front of a concave mirror of focal length 20 cm.(a) Where is the image formed and how far is it from the mirror?(b) How tall is the image?
What will be an ideal response?
Although we don't know exactly when clusters, galaxies, or stars began forming, we do know that clusters came first, with galaxies and stars forming later
Indicate whether the statement is true or false
A prismatic bar (diameter d0 5 18 mm) is loaded by force P1. A stepped bar (diameters d1 5 20 mm and d2 5 25 mm with radius of fillets R 5 2 mm) is loaded by force P2. The allowable axial stress in the material is 75 MPa. The ratio P1/P2 of the maximum permissible loads that can be applied to the bars, considering stress concentration effects in the stepped bar, is:
(A) 0.9
(B) 1.2
(C) 1.4
(D) 2.1
Why is Jupiter denser than Saturn?
A) Jupiter has a higher proportion of hydrogen compounds and rocks than Saturn. B) Jupiter's greater mass compresses its interior to a greater extent than that of Saturn. C) Jupiter has a much more massive core than Saturn. D) Jupiter has a greater proportion of helium compared to hydrogen than Saturn.