QUESTION 1 2 points Save Answer A football player is training with the Battle ropes at the gym, The rope that he is using is 4.12 m long nad has a mass of 11.2 kg. The force exerted by the athlete on the rope is 37.9 N. (a) What is the linear mass density of the rope? QUESTION 2 2 points Save Answer A football player is training with the Battle ropes at the gym, The rope that he is using is 4.12 m long nad has a mass of 11.2 kg. The force exerted by the athlete on the rope is 37.9 N. (b) What is the speed of the waves generated on the rope? QUESTION 3 2 points Save Answer A football player is training with the Battle ropes at the gym. The rope that he is using is 4.12 m long nad has a mass of 11.2 kg. The force exerted by the athlete on the rope is 37.9 N. (c) If the waves have a wavelength of 0.755 m, what is the frequency of the waves? QUESTION 4 3 points Save Answer A new inventor claims to have invented a new type of steam engine that operates between the temperatures of 120.0 C and 550.0 C and therefore has an efficiency of 78.2%. Calculate the efficiency of such steam engine to determine whether she is telling the truth. Give your answer as a percentage (without the % symbol. For example, if you think the percentage is 78.2% just write 78.2) QUESTION 5 4 points Save Answer A can of soda (made of aluminum), initially at room temperature (20.0 C) is placed in the freezer at a temperature of -4.00 C. If the mass of the can is 125.0 g and the specific heat capacity of aluminum is 890.0 J/kg-C, find the amount of heat trasferred from the can to the freezer. Mind the sign! QUESTION 6 2 points Save Answer The frequency of the middle C on the piano is 261.6 Hz. What is the wavelength of sound with this frequency as it travels in air at room temperature? (Take the speed of sound to be 344 m/s) QUESTION 7 6 points Save Answer An artifact is dug out of the ground on a Greek island and the archeologists want to determine the type of material it is made of. They have a tape measure and a very weird scale that measures mass density instead of mass. They measure the three sides of the artifact to be 1.25 mm, 2.75 mm, and 3.45 mm and a mass density of 379.4 g/cm^3. What is the mass of the material, in grams? (Hint: you must do some conversion to get the answer in the appropriate units) QUESTION 8 3 points Save Answer The fort Pitt bridge has a length of 368 m at a temperature of 20.0 C. It is made of steel (coefficient of linear expansion 12.0x 10-6/Co ). What would be the change in length (with the appropriate sign) when the temperature is -22.0 C? QUESTION 9 2 points Save Answer Italian pizza is generally made in a stone wood-fired oven and it is cooked at very high temperatures for a short time (a margherita, aka a cheese pizza, cooks for about 90 second). A typical wood-fired oven reaches a temperature of 450.0 C. What is this temperature in F