A 0.03 kg ice cube was melted at 0°C by an application of heat which further increased the temperature of the resulted water to 30°C. Calculate the total heat supplied to the system within this temperature range (Hint: Specific latent heat of fusion of water is 3.34 x 10 5 Jkg -1, specific heat capacity of water is 4200 Jkg -1K -1.)?

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?