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  1. M

    Check my answer for power output question

    Homework Statement a 0.25 kg piece of ice at -30°C is warmed by an electric heater and the following graph of temperature is produced. -use the information on the graph to determine the power output of the heater the graph shows that the ice went from -30degC to -10 degC in 150s Homework...
  2. M

    A container holds 8.0kg of water at 25degC...

    Homework Statement how much energy must be added to the water to create 2.0 kg of steam? Homework Equations The Attempt at a Solution I have no idea how im supposed to figure the answer out. what formulas do I use?
  3. M

    Calculate the Net Force

    Homework Statement Homework Equations The Attempt at a Solution 38) c^2=a^2=b^2-2abcosC c=([32.0N]^2=[38.0N]^2-2[32N]*[38N]cos125)1/2 c=62.15N sin law 32/sinA=62.2N/sin125 =24.8 or 25 i have no idea how to do the other two questions. please help ASAP!!!