12. [-/1 Points] DETAILS OSCOLPHYS2016 28.5.P.037. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER V2 (a) Find the momentum (in kg . m/s) of a 1.30 x 10 kg asteroid heading towards the Earth at 4,250 km/s. (Hint: Use the approximation that y = 1 + - at low velocities. Enter your answer to at 202 least six significant figures.) kg . m/s (b) Find the ratio of this momentum to the classical momentum. (Enter your answer to at least six significant figures.) P P classical + Additional Materials Reading 13. [-/1 Points] DETAILS OSCOLPHYS2016 28.5.P.042. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER (a) Calculate y for a proton that has a momentum of 4.94 kg . m/s. (b) What is its speed (in m/s)? Such protons form a rare component of cosmic radiation with uncertain origins. m/s14. [11 Points] DETAILS OSCOLPHYSZO16 28.6.P.043. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER What is the rest energy of a negative kaon, given its mass is 8.80 x 10'28 kg? Give your answer in joules. J Give your answer in MeV. MeV Additional Materials III Reading 15. [11 Points] DETAILS OSCOLPHYSZO16 28.6.P.046. MY NOTES ASK YOUR TEACH ER PRACTICE ANOTHER ' The Big Bang that began the universe is estimated to have released 1068 J of energy. How many stars could half this energy create, assuming the average star's mass is 4.05 x 1030 kg? Sta ['5 Additional Materials I21 Reading 16. [-11 Points] DETAILS OSCOLPHYSZO16 28.6.P.047. MY NOTES ASK YOUR TEACH ER PRACTICE ANOTHER A supernova explosion of a 2.20 x 1031 kg star produces 1.13 x 1044 J of energy. (a) How many kilograms of mass are converted to energy in the explosion? k9 (b) What is the ratio Am/m of mass destroyed to the original mass of the star? Additional Materials III Reading 17. [11 Points] DETAILS OSCOLPHYSZO16 28.6.P.048. MY NOTES ASK YOUR TEACHER (3) Using data from this table, calculate the mass (in g) converted to energy by the ssion of 1.00 kg of uranium. 9 (b) What is the ratio of mass destroyed to the original mass, Am ? m Am m=E 18. [-/1 Points] DETAILS OSCOLPHYS2016 28.6.P.051. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A positive muon has a rest mass energy of 105.7 MeV, and it decays into a positron and two particles of negligible mass. (The rest mass energy of a positron is 0.511 MeV.) (a) If all the lost mass is converted into the positron's kinetic energy, find y for the positron. (b) What is the positron's velocity? (Enter your answer in terms of c, accurate to at least five significant figures.)