The Sun is powered by the proton-proton cycle
Indicate whether the statement is true or false
TRUE
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The simply supported beam ABC shown below is acted upon by applied axial force P at B; by linearly varying distributed load q on BC; and by applied moments MA and MC. Reaction forces are given in the figure in terms of load variable P. The axial force (N), shear (V), and bending moment (M) at mid-span are (in terms of variables L and P):
(A) 0, 0.22P, 0.63PL
(B) P, 0.29P, 0.33PL
(C) 0, 1.36P, 0.33PL
(D) 0, 0.29P, 0.33PL
A 0.500-kg ball traveling horizontally on a frictionless surface approaches a very massive stone at 20.0 m/s perpendicular to wall and rebounds with 70.0% of its initial kinetic energy
What is the magnitude of the change in momentum of the stone? A) 18.4 kg ? m/s B) 14.0 kg ? m/s C) 3.00 kg ? m/s D) 1.63 kg ? m/s E) 0.000 kg ? m/s
The electric field in a cathode ray tube is supposed to accelerate electrons from 0 to 3.2 × 10^7 m/s in a distance of 2.00 cm. What electric field is required? (me = 9.11 × 10^?31 kg and e = 1.60 × 10^?19 C)
a. 4.6E+4 N/C b. 2.3E+5 N/C c. 1.5E+5 N/C d. 2.9E+5 N/C e. 1.6E+4 N/C
Three particles are placed in the xy plane. A 30-g particle is located at (3, 4) m, and a 40-g particle is located at (?2, ?2) m. Where must a 20-g particle be placed so that the center of mass of the three-particle system is at the origin?
a. (?3, ?1) m b. (+1, +3) m c. (+3, ?1) m d. (?1, ?3) m e. (?0.5, ?2) m