Amassless spring is attached to a support at one end and has a 2.0 μc charge glued to the other end. a -4.0 μc charge is slowly brought near. the spring has stretched 1.2 cm when the charges are 2.1 cm apart. what is the spring constant of the spring?

Which best describes the first law of thermodynamics as compared to the second law of thermodynamics? a. the first law describes how thermal energy is conserved but not the direction it moves. b. the first law describes the direction thermal energy moves but not how it is conserved. c. the first law describes how thermal energy can be created but not how it can be destroyed. d. the first law describes how thermal energy can be destroyed but not how it can be created.

Use 4 to 5 complete sentences, explain the concepts of beats and how beats are produces.

Which of the following is not used to measure wind? oa. psychrometero b. wind socko c. weather vaneo d. anemometer