Three identical (massless) springs are hung from the ceiling. Spring 1: Nothing hung from spring. The spring's bottom is 0.1 m below the ceiling. Spring 2: A 7 N object is hung from the spring. The spring's bottom is 0.7 m below the ceiling. Spring 3: An object of unknown weight is hung from the spring. The spring's bottom is 0.8 m below the ceiling. a.) Find the spring constant that each spring has.

Work = force × a. work b. energy c. distance d. momentum

Gas cloud 1 is likely to form a star. gas cloud 2 is not. based on this information, match the given conditions with each cloud

Which statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.