At this point, you have learned that heat is the of energythat is possessed by an object due to the motion of its particles. When this happens, an object’s changesfrom cool to warmer. There are ways of heat transfer: (a) , where heat is transferred between materials that are in direct contact with each other. While (b) , occurs when heat is transferred by electromagnetic waves (through space). And lastly, (c) is transfer of heat in fluids which makesthe hot fluids to rise and cold fluidstosink

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?