PLEASE HELP ME WITH THIS PHYSICS ASSIGNMENT THERES A TIME LIMIT

Question 7 The diagrams below represents the screen below a ripple tank. The shadows of the straight wave generator and the reflecting barrier are Not yet labelled. The incident waves are shown in blue and the reflected waves are shown in red. The selection below that correctly shows the answered reflection of the waves is selection Marked out of 1.00 a. C. Flag question Reflecting Reflecting barrier barrier Straight wave Straight wave generator generator b. d. Reflecting barrier S Reflecting barrier Straight wave Straight wave generator generatorQuestion 8 When a longitudinal wave moves through a medium, the medium Not yet answered Select one: Marked out of 1.00 O a. moves back and forth parallel to the direction of wave motion but generally stays in the same place. Flag O b. moves back and forth across the motion of the wave as it travels in the direction of wave motion. question O c. moves back and forth across the direction of wave motion but generally stays in the same place. O d. moves back and forth parallel to the direction of the wave motion as it travels in the direction of the wave motion.Question 9 The speed of sound in air is measured at 335 m/s. The frequency of a sound emitted by a source moving toward you is found to be 458 Hz. If the Not yet answered frequency of this sound at the source is actually 375 Hz, then the speed of the source is m/s. (Record your three-digit answer on Marked out of the answer sheet.) 1.00 Flag questionQuestion 10 Two-point Interference Pattern Not yet Two in-phase point sources in a ripple tank, S, and S2, generate the interference pattern shown below. Regions with Time left 2:28:30 answered Marked out of destructive or constructive interference are drawn as lines labelled from K to R. 1.00 L M N P Flag question K Q R S Refer to the diagram Two-point Interference Pattern to answer this question. The lines labelled K through R in the diagram indicate either a maximum (constructive interference) or a minimum (destructive interference). Which line represents constructive interference when the path-length difference is 1.01 (this is also called a first-order maximum)?Refer to the diagram Two-point Interference Pattern to answer this question. The lines labelled K through R in the diagram indicate either a maximum (constructive interference) or a minimum (destructive interference). Which line represents constructive interference when the path-length difference is 1.01 (this is also called a first-order maximum)? Select one: O a. Q O b. R Oc. M Od. PQuestion 11 Closed-Pipe Resonance Not yet answered A tuning fork held over a closed pipe produces resonance for particular lengths (L). Marked out of 1.00 (This diagram is not to scale.) Flag Tuning fork B question Tuning fork A Sliding closed-pipe tube Water Refer to the diagram Closed-Pipe Resonance to answer this question. The shortest length (L) of tube for which tuning fork A produces resonance is 12.8 cm. If the speed of sound is 332 m/s, then the frequency of this tuning fork is Hz. (Record your three-digit answer in the answer box.)