If each whole wiggle (wave) takes 0.29 seconds, how many times can it do a
whole wiggle in one second? (look at the
top of the screen)
f = 0.29 Hz
(it takes more than one second to make one
whole wave)
frequency = 3.4 Hz
(about 3 and a half waves per second)

The passage that directs air to the lungs is called a. diaphragm. b. larynx. c. bronchi. d. pharynx.

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b.b. at twice the distance, the magnitude of the field is 2b.c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.

Look at the electroscope, describe how you can cause the two leaves at the bottom to repel each other and stay that way