The linear momentum of a truck will be greater than that of a bus if
a. the truck's mass is larger than the bus's but its speed is the same
b. the truck's speed is larger than the bus's but its mass is the same
c. the truck's mass and speed are both larger than the bus's
d. any of the above
D
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Radio station KBOB broadcasts at a frequency of 85.7 MHz on your dial using radio waves that travel at 3.00 × 108 m/s
Since most of the station's audience is due south of the transmitter, the managers of KBOB don't want to waste any energy broadcasting to the east and west. They decide to build two towers, transmitting in phase at exactly the same frequency, aligned on an east-west axis. For engineering reasons, the two towers must be AT LEAST 10.0 m apart. What is the shortest distance between the towers that will eliminate all broadcast power to the east and west?
The Hubble Space Telescope can detect Cepheids up to the distance of 100 Mpc
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A tungsten wire is used to determine the melting point of indium. The resistance of the tungsten wire is 3.000 ? at 20.0°C and increases to 4.850 ? as the indium starts to melt. ?tungsten = 4.50 × 10^?3 (°C)?1 . What is the melting temperature of indium?
a. 132°C b. 157°C c. 351°C d. 731°C
A wave that travels from a medium of lower index of refraction to a medium of higher index of refraction undergoes 180° phase changes relative to the incident wave
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