When we say work is done against a force, we mean the force does
a. none of the work. b. positive work.
c. negative work. d. zero work.
c
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What are the planets of our Solar System in order from closest to farthest from the Sun?
What will be an ideal response?
A charge Q is spread uniformly along the circumference of a circle of radius R. A point particle with charge q is placed at the center of this circle. The total force exerted on the particle q can be calculated by Coulomb's law:
A) if you use R for the distance B) if you use 2R for the distance C) if you use 2?R for the distance D) and the result of the calculation is zero E) none of the above
If the stable nuclei are plotted with neutron number vs. proton number, the curve formed by the stable nuclei does not follow the line N = Z. This is predicted by examining how the binding energy is influenced by
a. the volume of the nucleus. b. the size of the nuclear surface. c. the Coulomb repulsion. d. the proton-neutron mass difference.
A spaceship of mass 106 kg is to be accelerated to 0.75c. How much energy does this require?
a. 13.61 × 10^23 J b. 5.95 × 10^23 J c. 5.06 × 10^22 J d. 4.61 × 10^22 J e. 27.00 × 10^23 J