15. Among the following objects, which does not have a magnetic field that is in

Question

15. Among the following objects, which does not have a magnetic field that is induced by some flavor of the dynamo effect? a. The Sun b. The Earth c. Mercury d. Jupiter e. Mars B. T/F statements [2pt for correct answer +1pt for correct explanation] 1. Kepler needed to first understand the force of gravity to derive his laws of planetary motion. a. True b. False 2. Measuring the apparent (angular) size of an object is insufficient to determine its physical size. a. True b. False 3. After its fly-by of Jupiter (which gave it a "kick" and redirected its orbit),NASA's New Horizons probe has travelled in a straight line without the aid of an engine (see Figure 2).Therefore its acceleration was zero during that part of its journey. a. True b. False

Explanation / Answer

15)

a) sun

1) false ( kepler law was given even before gravitational Laws)

2) true

3) false ( he has centrepetal acceleration)

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