Energy is released during a nuclear reaction due to a conversion between mass and energy. Mass is not conserved. The initial and final amounts are different. If a total of 1.0 gram of mass is "missing", how much energy has been released?
a. 9.0 × 10^11 J
b. 9.0 × 10^17 J
c. 9.0 × 10^15 J
d. 9.0 × 10^13 J
e. 9.0 × 10^16 J
D
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Convert a speed of 4.50 km/h to units of ft/min. (1.00 m = 3.28 ft)
A) 0.246 ft/min B) 82.3 ft/min C) 246 ft/min D) 886 ft/min E) 165 ft/min
A 900-kg car traveling 30.0° south of east at 12.0 m/s suddenly collides with a 750-kg car traveling north at 17.0 m/s
The cars stick together after colliding. What is the speed of the wreckage just after the collision? A) 7.21 m/s B) 12.2 m/s C) 20.4 m/s D) 25.0 m/s E) 17.3 m/s
Fragmenting during meteorite impacts caused the vesicular basalts found among the lunar samples
Indicate whether the statement is true or false
Scientists are confident that the Moon does not have a large, dense nickel-iron core because
A) the Moon's surface rocks are similar in density to the Moon's average density. B) deep samples taken by the Apollo astronauts found almost no iron. C) the Earth's magnetic field would pull anything with a lot of iron into the Earth. D) unmanned Soviet missions drilled into the Moon's core and did not find iron. E) a thick atmosphere is required for there to be a metal core.