Question 6 (8 points] A person uses a 512 Hz tuning fork to find the first two resonant lengths of a closed air column in a very warm classroom. The first length measured was 17.1 cm and the second resonant length was 51.3 cm. (a] Draw diagrams to show the standing wave pattern in each length and indicate the length in wavelengths. (b) Calculate the wavelength of the tuning fork at that temperature (c) Use the lab observations and analysis to find the speed of sound and the temperature of the room Question 7 (8 points] A receiver on a football team runs 8.0 m [E] and then turns abruptly to run 12.0 m [W]. If the entire motion takes 5.0 s, determine the receiver's (a] total distance travelled. (b) total displacement. (b) average speed. (c) average velocity Question 8 (9 points] Ms. Fizics pushed a large crate of textbooks (75 kg) down the hall to her office. She pushed as hard as she could and the crate accelerated down the hall at a rate of 1.5 m/s2. There was a coefficient of kinetic friction of 0.48 between the crate and the floor. (a) Draw a free-body diagram for the crate (b) Determine the net force on the crate. (c) Determine the crate's normal force. (d) Determine the force of friction on the crate (e) Determine the force exerted by May Fizies