What would become of the earth's orbit (which you may consider to be a circle) if half of the sun's mass were suddenly to disappear? would the earth remain bound to the sun? [hints: consider what happens to the earth's ke and pe at the moment of the great disappearance. the virial theorem for the circular orbit (problem 4.41) with this one.] treat the sun (or what remains of it) as fixed.

For me a person with a phd and who knows what there talking about.i know the chances of a radiation leak is low but if it does the area within a 96.3 mile radius would be unusable because of contamination

Answerthe energy required is 1.60 × 10⁻¹⁸ j, to three significant figures.explanationwe define electric potential as the ratio electric potential energy to the charge,    then the following gives us the potential difference,      the formula  may be on your formula sheet.the change in electric potential energy would be the energy that would needed to move it from point a to point b. solving for that, we get    using q = 8.00  × 10⁻¹⁹ c and  δv = 2.00 v, we get    the energy required is 1.60 × 10⁻¹⁸ j, to three significant figures.

Answerthe distance between the two ends of the galaxy is 150,000 light years;

This ain't even a question. speak english