In ?- decay, the number of protons in the nucleus is
A) decreased by 1.
B) decreased by 2.
C) increased by 1.
D) increased by 2.
E) remains unchanged.
C
You might also like to view...
When a boxer moves into an oncoming punch, the force experienced is
A) decreased. B) increased. C) no different, but the timing is different. D) all of the above
Three identical 50-kg balls are held at the corners of an equilateral triangle, 30 cm on each side. If one of the balls is released,
what is the magnitude of its initial acceleration if the only forces acting on it are the gravitational forces due to the other two masses? (G = 6.67 × 10-11 N ? m2/kg2) A) 3.7 × 10-8 m/s2 B) 2.5 × 10-8 m/s2 C) 1.9 × 10-8 m/s2 D) 4.2 × 10-8 m/s2 E) 6.4 × 10-8 m/s2
An electromagnetic wave has a magnetic field of rms value 3.0 × 10-6 T. What is the intensity of the wave?
A) 0.1 × 103 W/m2 B) 3.0 × 103 W/m2 C) 1.1 × 103 W/m2 D) 2.1 × 103 W/m2 E) 1.5 × 103 W/m2
A high-mass star dies more violently than a low-mass star because:
A) it must always end up as a black hole. B) it generates more heat and its core eventually collapses very suddenly. C) it cannot fuse elements heavier than carbon. D) gravity is weakened by its high luminosity. E) it is most often found as part of a binary system.