Tor f halogens are the basis of all fossil fuels.

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Write down two additional questions about earth's magnetic field that will make your presentation more informative.

Under the action of a constant force an object accelerates at 7.8 m/s2. what will the acceleration be if (a) the force is halved? (b) the object's mass is halved? (c) the force and the object's mass are both halved? (d) the force is halved and the object's mass is doubled?