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Question 2
The root-mean-square speed (thermal speed) of a certain sample of carbon dioxide molecules, with
a molecular weight of 44 g/mol, is 396 m/s. What is the root-mean-square speed (thermal speed) of
water vapor molecules, with a molecular weight of 18 g/mol, at the same temperature?
(1) 253 m s.
(2) 396 m s.
(3) 421 m s.
(4) 619 ms.
(6) None of the above,

Ok i am attempting to my niece attach a galvanized wire (like a tether for a dog) at the corner of two fences, making a tightwire if you will and we drilled a hole in a softball and she hits it. the ? and problem is that we can not get the wire taunt enough where it doesnt sag after hitting the ball once, and the wire sags and wobbbles. its a 15 ft rubber covered galvanized wire and one can adjust the length of the placing of the wire by having it make the corner of 2 fences become a it can be adjusted, however, with all our human strength and pliers we could not make it taunt as possible. is there anything other that attaching it to a car to do this. sorry abt the length but it would mean the world to my niece if i could solve this came up with the entire idea herself, and she is 14 and paid for the wire and did as much work as i did drilling a hole through a softball wide enough for attaching piece at each end of the wire that clips on to the fence. . any ideas welcome if serious. but awesome if it is a fact. much obliged. bucky bukowski buckman

Can you match these to the correct definition

If anyone who can me with this hw? i would really appreciate it