Which statement about seismic waves is FALSE?
A) Both S and P waves can be detected by seismographs.
B) Close to the epicenter, both S and P waves can be recorded.
C) P waves travel faster, so the gap between their arrival times gives the source's distance.
D) Only P waves can be detected in the shadow zone.
E) S waves are blocked by the fluid outer core and cannot be observed on the other side of the planet from the epicenter.
D
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What is the total mass of the Earth's atmosphere? The radius of the Earth is 6.4 × 106 m, and 1 atm = 1.01 × 105 N/m2.
A. 5.3 × 1016 kg B. 1.1 × 1018 kg C. 5.3 × 1018 kg D. 1.1 × 1020 kg E. 5.3 × 109 kg
Suppose you were to try to create a proton-antiproton pair by annihilation of a very high energy photon. The proton and the anti-proton have the same masses, but opposite charges. What energy photon would be required?
A) 1.022 MeV B) 12.2 MeV C) 1880 MeV D) 940 MeV E) 223 MeV
The lift experienced by a helicopter involves an action-reaction pair of forces between the
A) helicopter blades and the air. B) mass of the helicopter and Earth's mass. C) weight of the helicopter and atmospheric pressure. D) motion of the helicopter relative to the ground below. E) any or all of the above
A square is 1.0 m on a side. Point charges of +4.0 ?C are placed in two diagonally opposite corners. In the other two corners are placed charges of +3.0 ?C and -3.0 ?C
What is the potential (relative to infinity) at the midpoint of the square? (k = 1/4??0 = 9.0 × 109 N ? m2/C2 ) A) 1.0 × 104 V B) 1.0 × 105 V C) 1.0 × 106 V D) 0 V E) infinite