How many chirps will a snowy tree cricket give is 21 seconds at a temperature of 22 degree celcius

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.

Abar magnet cut in half will form a total ofpoles.a)fourb)eightc)two

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