A person hears an echo from the top of a tower, 2.2 seconds after the sound is produced how far away is the tower from the person? Speed of the sound in the air is 332m/s

What occurs when vibrations traveling through an object match the object's natural frequency? a. reflection b. refraction c. diffraction d. resonance

Two people timed an object with a stop watch. They each got a slightly different result how could this be?

Which of the following statements best describes the object's motion between the time period of 23s to 30s? A. the object is at rest B. the object has a negative velocity C. the object has a positive velocity D.

How is frequency in a transverse wave similar to frequency in a longitudinal wave?

A wave pulse traveling to the right along a thin cord reaches a discontinuity where the rope becomes thicker and heavier.

Which moon has a thick atmosphere made mostly of nitrogen?

J. J Thompson proposed that atoms were made up of positively charged particles with electrons scattered into them. How did he reach this conclusion?

A bathroom scale is compressed 0.21 in. when a 210 -lb person stands on it. Assuming that the scale behaves like a spring that obeys Hooke's law, how much does someone who compresses the scale 0.06 in.

Explain what happens when a ferromagnetic material is made into a permanent magnet.

You are drawing a branching diagram to show the relationship between Turtles frogs and alligators which two organisms does the diagram indicateas having the most recent common ancestor