Find the solution of equation 4cos^2 (theta) - 3 = 0 (in the interval [0, 2pi]

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

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?

8. what happens to matter during a chemical reaction