A force-carrying particle is a(n)
a. lepton
b. baryon
c. meson
d. intermediate (or gauge) boson
e. hadron
D
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A positively charged particle has a velocity in the negative z direction at point P. The magnetic force on the particle at this point is in the negative y direction. Which one of the following statements about the magnetic field at point P can be determined from this data?
a. Bx is positive. b. Bz is positive. c. By is negative. d. By is positive. e. Bx is negative.
The position of a mass that is oscillating on a spring is given by x = (12.3 cm) cos[(1.26s-1)t]. What is the velocity of the mass when t = 0.815 s?
A) - 13.3 cm/s B) 13.3 cm/s C) 8.02 cm/s D) - 8.02 cm/s E) 0 cm/s
Multiple-Object Accelerating Systems: The figure shows a 100-kg block being released from rest from a height of 1.0 m. It then takes 0.53 s for it to reach the floor. What is the mass m of the block on the left? There is no friction or mass in the pulley, and the connecting rope is very light. 
A. 16 kg B. 14 kg C. 13 kg D. 11 kg
In a given period, the element of Group ______________ has the lowest ionization energy
Fill in the blank(s) with correct word