When air is blown across the top of an open
water bottle, air molecules in the bottle vibrate
at a particular frequency and sound is produced.
this phenomenon is called
(1) diffraction (3) resonance
(2) refraction (4) the doppler effect

Steelhead trout migrate up stream to spawn.occasionally they need to leap up small waterfalls to continue their journey. fortunately, steelhead are remarkable jumpers, capable of leaving the water at a speed of 8.0 m/s. a. what is the maximum height a steelhead trout can jump? b.leaving the water at 8.0 m/s, the trout lands on top of the water fall 1.8 m high. how long was it in the air?

Which of the the following are examples of projectile motion of both projectile motion and two dimensional motion

Determine the force the sun exerts on an object with a mass of 80.0 kg if that object is on the earth. what is the force exerted by the moon on the same object? what is the force the earth exerts on it?