If a substance can be separated by physical means and it is not the same throughout, what is it? question 18 options: a heterogeneous mixture a homogeneous solution a pure substance a compound an element

During spring semester at mit, residents of the parallel buildings of the east campus dorms battle one another with large catapults that are made with surgical hose mounted on a window frame. a balloon filled with dyed water is placed in a pouch attached to the hose, which is then stretched through the width of the room. assume that the stretching of the hose obeys hooke's law with a spring constant of 89.0 n/m. if the hose is stretched by 5.80 m and then released, how much work does the force from the hose do on the balloon in the pouch by the time the hose reaches its relaxed length? unitst 3 number-1497 the tolerance is +/-5% open show work click if you would like to show work for this question:

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?

Sunidhi made a study chart about changes in states of matter. which headings best complete the chart?