Particle A has mass m and speed
. Particle B has mass 
and speed 
. How do the magnitudes of their relativistic momenta compare?
A. 
B.
C.
B.
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Magnetic Materials: When a ferromagnetic material is placed in an external magnetic field, the net magnetic field of its magnetic domains becomes
A. smaller. B. zero. C. larger.
The apparent brightness of stars is ranked according to magnitude. The brightest stars were originally ranked as what magnitude?
a. Zero b. Sixth c. First d. None of the above
An object of 1.0 kg mass is pulled up an inclined plane by a constant force of 10 N that causes a displacement of 0.50 m. The angle of inclination with the horizontal is 30°. Neglect friction and use g = 10 m/s2. What is the work done by the 10 N force on the object along the inclined plane?
A) 4.3 J B) 4.3 kg m/s2 C) 5.0 J D) 2.5 J
In a certain cyclotron, a proton of mass 1.67 × 10-27 kg moves in a circle of diameter 1.6 m with an angular speed of 2.0 × 106 rad/s. What is the angular momentum of the proton?
A) 1.3 × 10-21 kg ? m2/s B) 1.8 × 10-21 kg ? m2/s C) 2.1 × 10-21 kg ? m2/s D) 3.2 × 10-21 kg ? m2/s