7. A 45.0-kg block of ice at 0°C is sliding on a horizontal surface. The initial speed of the ice is 7.30 m/s and the final speed is 3.30 m/s. Assume that the part of the block that melts has a very small mass and that all the heat generated by kinetic friction goes into the block of ice. Determine the mass of ice that melts into water at 0°C. grams 60 ss

A 60.0-kg runner expends 359 W of power while running a marathon. Assuming 12.5% of the energy is delivered to the muscle tissue and that the excess energy is removed from the body by sweating, determine the volume of bodily fluid (assume it is water) lost per hour. (At 37.0°C the latent heat of vaporization of water is 2.41 ✕ 106 J/kg.) cm3

H78

5. A 0.400-kg of ice is initially at temperature of -12.0 °C. How much heat is required to melt two-third the mass of the ice only? J

2.12 A mass of 5 kg of water is contained in a piston-cylinder device at 125 kPa. Initially, 2 kg of the water is in the liquid phàse and the rest is in the vapor phase. Heat is now transferred to the water, and the piston, which is resting on a set of stops, starts moving when the pressure inside reaches 300 kPa. Heat transfer continues until the total volume increases by 20%. a) Determine the initial and final temperatures. b) Calculate the mass of liquid water when the piston first starts moving. c) Calculate the work done during this process. d) Show the process on a P-V diagram

If a copper pipe requires 6.7 J to raise its temperature by 1 °C, what is the quantity of heat required to raise the temperature from 25°C to 29°C?   Question options: a. 72.8 J b. 362 J c. 623 J d. 27.1 J e. 263 J