I have no idea why I did these questions wrong. Please provide me with the correct answers!

6. [112 Points] PREVIOUS ANSWERS SERFSE1D 17.A.OF.O44. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A flute may be thought of as a pipe open at both ends. When all the holes of a wellidesigned ute are covered and the temperature is 200C, it will produce sound with a frequency of 261.6 Hz (middle C). The speed of sound in air at 20.0C is 343 m/s. (a) Find the length of the flute (in m), assuming middle C is the fundamental. [1555 v m (b) When an identical ute is played at the same time and in the same manner (all holes covered) in a nearby cold room, a beat frequency of 1.53 Hz is heard. Determine the temperature in the cold room (in \"(3). 1622096188 x First, establish if the frequency in the cold room will be greater or smaller than in the warm room. See if you can write an expression which shows how the frequency depends on speed of sound and the length of the flute for both the warm and cold room and then combine these expressions to Obtain the speed of sound in the cold room. Knowing the speed of sound in the cold room and how the speed of sound depends on the temperature, you can now determine the temperature in the cold room. \"C 8. [1/3 Points] DETAILS PREVIOUS ANSWERS SERPSE10 13.6.OP.026. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A communications satellite is launched into circular orbit around the Earth, at an altitude h. The satellite's mass is m, and it was launched from Earth's surface. (Use the following as necessary: R for the radius of the Earth, ME for the mass of the Earth, G for the gravitational constant, m, and h.) (a) How long does the satellite take to complete one circular orbit? An h + RE T = GMF (b) What is the satellite's speed? 2R An h + RE 3 V satellite = GMF X The gravitational force supplied the needed centripetal acceleration, so equate the expression for Newton's law of universal gravitation to the centripetal force, and solve for v. (c) What is the minimum energy input necessary to place this satellite in orbit? Ignore air resistance but include the effect of the planet's daily rotation. (Use the following as necessary: RE, ME, G, m, h, and TE for the period of Earth's rotation.) An RE AE min m + GME RE Roth X In order to place the satellite in orbit, the energy input must equal the change in its initial and final energies. The initial energy, when the satellite is on Earth's surface, is its kinetic and potential energies with respect to Earth's center. That means the satellite has an initial kinetic energy due to Earth's rotation, and potential energy relative to Earth's center. You can find the final kinetic energy from the satellite's speed calculated in part (b), and from its gravitational potential energy at height h.7. [314 Points] PREVIOUS ANSWERS SERFSE1D 13.5.0P.020. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER After the Sun exhausts its nuclear fuel, its ultimate fate will be to collapse to a white dwarf state. In this state, it would have approximately the same mass as it has now, but its radius would be equal to the radius of the Earth. (a) Calculate the average density of the white dwarf (in kg/m3). 1837079187 4 kg/m3 (b) Calculate the surface freeafall acceleration (in m/s 3269501092 .' m/s2 (c) Calculate the gravitational potential energy (in J) associated with a 5.11 kg object at the surface of the white dwarf. 1,060426e+14 x The response you submitted has the wrong Sign. J 2)_ (d) What If? The escape speed from the \"surface" of the Sun, or a distance equal to its radius, is 617.5 km/s. What would be the escape speed (in kmls) from the surface of the white dwarf? 6447 306428 km/s