(5) A spider hangs from a strand of silk whose radius is 3.23E6 m. The density of the silk is 1400 kg/m3, when the spider moves, waves travel along the strand of silk at a speed of 292 m/s. Determine the mass of the spider. (Note: The weight of the silk is negligible compared to the tension, so assume tension is constant.) Submit Answer Tries 0/10 0 a (6) Sidhu uses a 5.42 m long rope to pull Aarna (m = 71.5 kg) horizontally across the floor with a coefcient of kinetic friction of Pk = 0.200 at a constant speed of 3.38 m/s. Aarna signals to Sidhu to stop by "plucking\" the rope, sending a wave pulse forward along the rope. The pulse reaches Sidhu 245.0 ms later. What is the mass of the rope? Submit Answer Tries 0/10 " q (7a) Tsunamis are fastmoving waves often generated by underwater earth quakes. In the deep ocean their amplitude is barely noticeable, but upon reaching shore, they can rise up to the astonishing height of a six story building. One tsunami, generated near the Aleutian islands in Alaska, had a wavelength of 830 km and traveled a distance of 3970 km in 5.5 h. What was the speed (in m/s) of the wave? Tries 0/10 (7b) What is the frequency of the wave? : Tries 0/10 (7c) What is the period of the wave? :l Tries 0/10 "a (8) Earthquakes are essentially sound waves travelling through the earth. They are called seismic waves. Because the earth is solid, it can support both longitudinal and transverse seismic waves, which travel at different speeds. The speed of longitudinal waves, called P waves, is 7501.0m/s. Transverse waves, called 5 waves, travel at a slower 4431.0m/s. A seismograph records the two waves from a distant earthquake. If the 5 wave arrives 2.87min after the P wave, how far away was the earthquake? You can assume that the waves travel in straight lines, although actual seismic waves follow more complex routes. :} Submit Answer Tries 0/10 "a (9) A hammer taps on the end of a 6.52 m long metal bar at room temperature. A microphone at the other end of the bar picks up two pulses of sound, one that travels through the metal and one that travels through the air. The pulses are separated in time by 9.19 ms. What is the speed of sound in this metal? (the speed of sound in air is mm :1 '0 a (10) The drawing shows a frictionless incline and pulley. The two blocks are connected by a wire (mass per unit length = 0.0281 kg/m) and remain stationary. A transverse wave on the wire has a speed of 73.0 m/s. Neglecting the weight of the wire relative to the tension in the wire, find the masses m1 and m2 of the blocks. (10a) m1: Submit Answer Tries 0/ 10 (10b) m2: Submit Answer Tries 0/10 Submit AII