Which element has 7 valence electrons ? a. nitogen(n) b. neon(ne) c. lithium(li) d. chlorine(ci)

Keneila is attempting to ski down a 20 m high friction free hill for the first time. she has a speed 10 m/s at the top. what is her kinetic energy when she is a the bottom, 20 m ? (a)2500 j (b)9800 j (c)12300 j (d)3100j (e)15000j

How would doubling the made of an object change the objects potential energy

Which of the following is not am example of a polymer? protein nylon kevlar concreta