Sound traveling in air at 23 enters a cold front where the air temperature is 2If the frequency of the sound is 1500 Hz, what is the difference in the wavelength between the cold air and the warm air?

A. 0.009 m
B. 0.019 m
C. 0.067 m
D. 0.058 m


A. 0.009 m

Physics & Space Science

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Physics & Space Science

A 4.00 kg object is moving at 5.00 m/s NORTH. It strikes a 6.00 kg object that is moving EAST at 2.00 m/s. The objects have a completely inelastic (stick together) collision. The velocity of the 6.00 kg object after the collision is

A. 2.33 m/s at an angle of 35.0 degrees NORTH of EAST. B. 2.33 m/s at an angle of 59.0 degrees NORTH of EAST. C. 2.00 m/s at an angle of 59.0 degrees NORTH of EAST. D. 2.00 m/s at an angle of 45.0 degrees NORTH of EAST. E. 2.33 m/s at an angle of 45.0 degrees NORTH of EAST.

Physics & Space Science

A football player leaps at 3.0 m/s toward a second football player, who is at the time of the collision moving at 0.5 m/s toward the first player. After the collision, the two players move together at 1.2 m/s. If the originally stationary player's mass is 175 kg, what is the other's mass?

A. 185 kg B. 119 kg C. 165 kg D. 68 kg

Physics & Space Science

Which of the following statements about an open cluster is true?

A) All stars in the cluster are approximately the same color. B) All stars in the cluster are approximately the same age. C) All stars in the cluster have approximately the same mass. D) All stars in the cluster will evolve similarly. E) There is an approximately equal number of all types of stars in the cluster.

Physics & Space Science