Atungsten wire has resistance r at 20°c. a second tungsten wire at 20°c has twice the length and half the cross-sectional area of the first wire. in terms of r, the resistance of the second wire is
(1)r/2
(2)2r
(3)r
(4)4r

Write short note on the following ; collision theory, rotation angle and angular velocity, centripetal acceleration, coriolis force, and newton's law of gravitation.

Imagine you work as a consultant, and your daily job involves listening to the constructive criticism of others. as part of your job, you must listen to opposing viewpoints to make important decisions. in this activity, you are a consulting dam engineer. you must make a decision about four different dams; should they be repaired, taken down, or left alone? you will listen to contrasting opinions about what should be done with the dams before you make the final decision. as the consulting dam engineer, what do you decide to do with this dam? explain your reasoning. by making your decision, did you support the opinions of the mayor and/or the dam safety official? why or why not? (site 1)

Chemical energy is a form of energy. a. heat b. kinetic c. potential d. electromagnetic