A metal cube has a mass of 5.81kg and is at rest on a table. The length of one side of the cube is 8.00 cm.
Which row in the table gives the correct values for density of the metal and pressure exerted by the
cube on the table top?
Density of the metal / kg/m3 Pressure due to cube / Pa

A 11300 9080
B 11300 1510
C 11300 908
D 1510 9080
E 1510 1510
F 1510 908

Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?