NAME TEAMWORK# FINAL(p-4) PHYS 1401 1- How much i end up with all liquid at 20°C

Question

NAME TEAMWORK# FINAL(p-4) PHYS 1401 1- How much i end up with all liquid at 20°C? 2- In moving a 40.0-kg desk from one side of a room to the other, a person finds that a horizontal force of 280 N is needed to set the desk in motion, and a F force of 200 N is needed to keep it in motion at constant velocity. (a) What are the coefficients of static and kinetic friction. m/s. (b) Calculate the force needed if the desk accelerate at 0.2 (c) Draw the free-body diagram. mg (1.8) 3- suppose your bicycle tire is fully inflated with absolute pressure of 2x 10 N/m at a temperature of 25.0°C. What will it's gauge pressure be after its temperature has risen to 35.00 C? There are no appreciable leaks nor change in volume.

Explanation / Answer

1) Cice*mice*(T1-T0) + Cf * mice = Cwater*mwater*(T2-T0)

here, Cice is the specific heat of ice = 2.108 J/gK

Cwater is the specific heat of water = 4.187 J/gK

Cf is the heat of fusion of ice = 333.55J/g

T1 = -10oC

T2 = 20oC

To = 0oC (melting point of ice)

substituting the requisite values in the equation and solving for mice, we get

mice = 118.1g

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