Calculate the reaction energy (Q value) for the reaction 7Li + 1H ? 4He + 4He, given the following masses:
7Li: 7.016005 u
1H: 1.007825 u
4He: 4.002603 u
(1 u = 931.5 MeV/c2)
A) 15.37 MeV B) 17.35 MeV C) 17.53 MeV D) 13.57 MeV E) 13.35 MeV
B
You might also like to view...
Which of the following correctly describes the situation when Jackie returns to Earth? (Ages in this problem refer to biological ages—that is, how much time has passed for each sister since she was born.)
A) It's the year 2050, and both twin sisters are 70 years old. B) It's the year 2050. Gwen (who stayed home) is 70 years old, but Jackie is only a little older than her age of 20 when she left. C) It's the year 2050. Gwen is 70 years old. Jackie is 19. D) It's the year 2100. Gwen and Jackie are both 120 years old. E) According to Gwen, Jackie returns to Earth in the year 2050, but according to Jackie, she returns in the year 2001.
A string with a fixed frequency vibrator at one end is subjected to varying tensions. When the tension is 20 N, a resonance with 3 antinodes results. What tension would cause a resonance with 2 antinodes in this string?
A. 30 N B. 45 N C. 80 N D. 8.9 N E. 13 N
A car goes around a curve at 40 m/s. An accelerometer in the car measures the centripetal acceleration of a 2 kg body in the car to be 8 m/s2 . The radius of the curve is __________
Fill in the blank(s) with correct word
A 1200-kg pick-up truck traveling south at 15 m/s suddenly collides with a 750-kg car that is traveling east. The two vehicles stick together and slide along the road after colliding
A highway patrol officer investigating the accident determines that the final position of the wreckage after the collision is 25 m, at an angle of 50° south of east, from the point of impact. She also determines that the coefficient of kinetic friction between the tires and the road at that location was 0.40. What was the speed of the car just before the collision? A) 20 m/s B) 4.8 m/s C) 14 m/s D) 23 m/s E) 17 m/s