Recalling that iron lies at the lowest point of the "nuclear energy curve," which of the following nuclear reactions would "release" [that is, convert to other forms] nuclear energy from iron?
A) Fusion
B) Fission
C) Both of the above.
D) None of the above.
E) This is the wrong answer.
D
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A 3.0 kg object is moving to the right at 4.0 m/s. It collides in a perfectly inelastic collision with a 6.0 kg object moving to the left at 2.0 m/s. What is the total kinetic energy after the collision?
A. 62 J B. 25 J C. 12 J D. 0.0 J
Compared to the planets in our own solar system, exoplanets have
A) a much narrow range of composition B) a much wider range of compositions C) an almost identical range of compositions D) completely different compositions
Several resistors are connected in series. Which of the following statements is correct? Choose all that are correct
1.The equivalent resistance is greater than any of the resistances in the group. 2.The equivalent resistance is less than any of the resistances in the group. 3.The equivalent resistance depends on the voltage applied across the group. 4.The equivalent resistance is equal to the sum of the resistances in the group. 5.None of those statements is correct.
A 60.0-kg person drops from rest a distance of 1.20 m to a platform of negligible mass supported by an ideal stiff spring of negligible mass. The platform drops 6.00 cm before the person comes to rest
What is the spring constant of the spring? A) 2.56 × 105 N/m B) 3.92 × 105 N/m C) 5.45 × 104 N/m D) 4.12 × 105 N/m E) 8.83 × 104 N/m