Describe how the sun's rotation is responsible for observed polarities of sunspots
What will be an ideal response?
The Sun's differential rotation wraps its magnetic field lines around the equator as it turns. The north-south orientation of the field lines becomes oriented east-west. Convection further mixes the field pattern, until the field lines are tangled and kinked like a garden hose. Occasionally, the field lines burst out of the surface, forming a sunspot pair in the east-west direction.
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A wrench is placed at 30 cm in front of a diverging lens with a focal length of magnitude 10 cm. What is the magnification of the wrench?
A) 4.0 B) 0.67 C) -0.67 D) -0.25 E) 0.25
A mass sits at rest on top of a table. Which two forces are interaction pair forces and thus are equal and opposite?
A. the force of gravity on the mass due to the earth and the force of gravity on the earth due to the mass B. the force of gravity on the mass due to the earth and the contact force on the table due to the mass C. the contact force on the mass due to the table and the force of gravity on the earth due to the mass D. the force of gravity on the mass due to the earth and the contact force on the mass due to the table
How does volcano activity connect to warning signs?
What will be an ideal response?
Which of the following is the most convincing observation that suggests that like Europa, Ganymede may also have a subsurface ocean?
A) the detection of salts on the surface that may have been brought up from below the crust B) the presence of young grooved terrain that may be the result of cryovolcanism C) the fact that it is the largest moon in the solar system and, hence, should have plenty of internal heat to maintain liquid water beneath its surface D) in addition to its internal magnetic field, Ganymede has a magnetic field induced by Jupiter which is consistent with a salty ocean beneath its crust