11.     what are the two gases that escaped earth's atmosphere during early formation?  
            a.  hydrogen and helium    b.  helium and nitrogen    c.  hydrogen and nitrogen    d.  helium and oxygen 

Two nitro no2 groups are chemically bonded to a patch of surface. they can't move to another location on the surface, but they can rotate (see sketch at right). it turns out that the amount of rotational kinetic energy each no2 group can have is required to be a multiple of ε, where =ε×1.010−24 j. in other words, each no2 group could have ε of rotational kinetic energy, or 2ε, or 3ε, and so forth — but it cannot have just any old amount of rotational kinetic energy. suppose the total rotational kinetic energy in this system is initially known to be 32ε. then, some heat is removed from the system, and the total rotational kinetic energy falls to 18ε. calculate the change in entropy. round your answer to 3 significant digits, and be sure it has the correct unit symbol.

How heavy is thanos? a) 3000 lbs b) all of it c) the price of tea in china d) heavy enough

According to the tide table below what time of day will the highest tide occur? (2 pt) the highest tide will occur at