A 3.00 gram dart compresses a spring by 4.00cm. The dart lands 3.60m downrange when fired horizontally from the gun from a height of 113cm. All answers must be given in standard S. I. units as a number without units, using precisely 2 significant digits. (e. g. 12.0N = 12 or 0.3s = .30)

what is the air-time of the dart
what is the horizontal velocity of the dart
what is the initial kinetic energy of the dart
what is the spring constant

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:

12. a body is a particular amount of matter. it can be a solid, liquid or gas. it can be described as existing in a. size and shape. b. motion and force c. time and space. d. location and movement.

Language is not the only way that humans communicate. describe how we use sound, touch, chemicals, and sight to communicate. need answer asap