Which of the following methods of decay does not result in an element different from that of the original parent nucleus?
a. alpha followed by negative beta followed by another negative beta
b. alpha followed by beta
c. alpha followed by gamma followed by another gamma
d. alpha followed by positive beta followed by another positive beta
a
You might also like to view...
A 4.0-kg block is lowered down a 37° incline a distance of 5.0 m from point A to point B. A horizontal force (F = 10 N) is applied to the block between A and B as shown in the figure. The kinetic energy of the block at A is 10 J and at B it is 20 J. How much work is done on the block by the force of friction between A and B?
A. ?58 J B. ?53 J C. ?68 J D. ?63 J E. ?47 J
Briefly describe two key pieces of evidence that support the Big Bang theory.
What will be an ideal response?
Notice the well-defined spiral arms in this photograph of the galaxy M51. What makes the spiral arms so much brighter than regions between the arms?
A) the presence of many massive young stars in the spiral arms B) the presence of many old, red giant stars in the spiral arms C) the presence of many hot interstellar bubbles in the spiral arms D) The spiral arms are bright because nearly all the galaxy's stars are located within them.
Which of statement below about black holes is not true?
A) Although we are not 100% certain that black holes exist, we have strong observational evidence in favor of their existence. B) If you watch someone else fall into a black hole, you will never see him (or her) cross the event horizon; you'll only see him fade from view as the light he emits or reflects becomes more and more redshifted. C) A spaceship passing near a 10-solar-mass black hole is much more likely to be destroyed than a spaceship passing at the same distance from the center of a 10-solar-mass main-sequence star. D) If you fell into a black hole, you would experience time to be running normally as you plunged rapidly across the event horizon.