Two radio antennas are 10 km apart on a north-south axis on high mountain tops at the seacoast. The antennas broadcast identical AM radio signals,
in phase, at a frequency of 4.70 MHz. A steamship, 200 km offshore, travels toward the north at 15 km/h and passes east of the antennas. A radio on board the ship is tuned to the broadcast frequency. The reception of the radio signal on the ship is a maximum at a given instant. How much later until the next occurrence of maximum reception? (c = 3.00 108 m/s)
A) 5.1 min
B) 3.8 min
C) 6.4 min
D) 7.7 min
E) 8.9 min
Question 2
) A supercritical fluid least resembles
A) a solid.
B) a liquid.
C) a gas.
D) All of the above.
Question 3
In what phase of matter are the particles no longer moving?
A) solid
B) liquid
C) gas
D) none of the above
Axis (C2)
Radio Telescope
South African cave sites.
North Atlantic Oscillation
Polar wandering paths for Eurasia and North America