When 150 joules of work is done on a system by
an external force of 15 newtons in 20. seconds,
the total energy of that system increases by
(1) 1.5 x 10
(3) 3.0 x 10)
(2) 2.0 x 10-
(4) 2.3 x 103]

Note: the following questions are unrelated to the balmer series or the martian. refer to your course notes. a sun-sized star will spend most of its lifetime as a: white dwarf b. red giant c. protostar d. main-sequence star

Which of the following is a homogenous mixture? o a. a toy box filled with toys o b. blood o c. trail mix o d. spaghetti and meatballs submit

Apebble is thrown into a calm lake, ripples are formed from the center and move outward. the water particles in the lake travel in a circular pattern that moves up and down on the surface of a lake, and the energy travels a) diagonally. b) downward. c) horizontally. d) upward.