1. [-11 Points] DETAILS SERPSE10 9.4.0P.011. 0/6 Submissions Used MY NOTES ASK YOUR TEACHER A 10.10-g bullet is fired into a stationary block of wood having mass m = 4.910 kg. The bullet imbeds into the block. The speed of the bullet- pluswood combination immediately after the collision is 0.5910 m/s. What was the original speed of the bullet? (Express your answer with four significant figures.) Em Need Help? QW ._.W 2. [-13 Points] DETAILS SERPSE1O 9.4.0P.O12.MI. 0/6 Submissions Used MY NOTES ASK YOUR TEACHER A neutron in a nuclear reactor makes an elastic, headon collision with the nucleus of a carbon atom initially at rest. (a) What fraction of the neutron's kinetic energy is transferred to the carbon nucleus? (The mass of the carbon nucleus is about 12.0 times the mass of the neutron.) |:l (b) The initial kinetic energy of the neutron is 1.70 x 10'13 J. Find its final kinetic energy and the kinetic energy of the carbon nucleus after the collision. neutron :l J carbon nucleus: J New Help? @@ 3. [-11 Points] DETAILS SERPSE1O 9.4.0P.O13.CTX. 0/6 Submissions Used MY NOTES ASK YOUR TEACHER You are in the early stages of an internship at NASA. Your supervisor has asked you to analyze emergency procedures for extravehicular activity (EVA), when the astronauts leave the International Space Station (155) to do repairs to its exterior or perform other tasks. In particular, the scenario you are studying is a failure of the mannedmaneuvering unit (MMU), which is a nitrogen-propelled backpack that attaches to the astronauts primary life support system (PLSS). In this scenario, the astronaut is floating directly away from the ISS and cannot use the failed MMU to get back. Therefore, the emergency plan is to take off the MMU and throw it in a direction directly away from the ISS, an action that will hopefully cause the astronaut to reverse direction and float back to the station. You have the following mass data provided to you: astronaut: 80.1 kg, spacesuit: 36.8 kg, MMU: 115 kg, PLSS: 145 kg. Based on tests performed by astronauts oating "weightless" inside the [55, the most kinetic energy they can impart to an object by throwing it while floating is about 100 J, measured in the rest frame of the 155. Your supervisor asks you to determine an upper limit of the speed with which an astronaut can drift away from the ISS and rescue himself by throwing his failed MMU. (Give your answer in m/s.) :m/s Need Help