a. With your group members, write an equation that describes the graph line shown below. Note that v is the speed of a wave on a string, F is the magnitude of the force exerted on the end of the string (equal to the tension in the string), and u is the mass per unit length of the string. Check to see if this equation consistent with the data in Activity 2.2? v (m/s) 10 (F/p³ (m/s) 10 b. Determine the speed of a wave pulse on a 0.080-kg/m string when a person pulls, exerting a 2.0-N force on the end of the spring.

Suppose you shake a slinky continuously in an up and down fashion such that a transverse waves propagate horizontally down its length. If you count 15 peaks have been made during a time of 2.03s, what is the frequency of the wave (in Hz)? V Note: In the space below, please enter you numerical answer. Do not enter any units. If you enter units, your answer will be marked as incorrect.

Please answer number 2.

The ability to hear a "pin drop" is the sign of sensitive hearing. Suppose a 0.53 g pin is dropped from a height of 31 cm, and that the pin emits sound for 1.4 s when it lands. Part A Assuming all of the mechanical energy of the pin is converted to sound energy, and that the sound radiates uniformly in all directions, find the maximum distance from which a person can hear the pin drop. (This is the ideal maximum distance, but atmospheric absorption and other factors will make the actual maximum distance considerably smaller.) Express your answer using two significant figures. Hνα ΑΣφ ? r = km