The "rock eater" penetrated medium and rock with times the speed of other drill bits. * Firm;10
Hard;10
Firm;15
Hard;15

Can someone me with questions 12 and 13 plz.

Select the correct answer from each drop-down menu.describe what happens to a carbon-11 atom when it undergoes positron emission.the decay of a carbon-11 atom _1_, and this causes it to emit _2_.options for 1: > changes a neutron into a proton> changes a proton into a neutron> is hit with a neutron> reconfigures its protons and neutronsoptions for 2: > a negatively charged electron-sized particle> a positively charged election-sized particle> two atoms and several neutrons> two neutrons and two protons

In salt water solution,the salt is the blank