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April 20 - General Physics III Homework Assignments Cory...

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Unformatted text preview: General Physics III Homework Assignments Cory poynter Homework Due Date: April 13 Problems: 20-6,9,15,23,26,33,35,52 6) aluminum cup (m a ) = 200g Specific heat of aluminum (c a ) = 900 J/kg°C Water (m w ) = 800g Specific heat of water (c w ) = 4186 J/kg°C Starting temperature (T i ) = 80°C Drop in 1 minute ∆T = 1.5°C Temperature after minute = 78.5°C Q = (m a c a + m w c w )∆T specific heat capacity = ((200g x 900 J/kg°C) + (800g x 4186 J/kg°C) x 1.5°C = 5293.2J = . 5293 2J1min = . 5293 2J60sec = 88.22W 9) aluminum (m al ) = 100g Specific heat of aluminum (c al )= 0.215 cal/g°C water(m w ) = 250g Specific heat of water(c w ) = 1 cal/g°C Temperature of water = 10°C copper (m cu) = 50.0g Specific heat of copper c cu = 0.0924 cal/g°C Temperature of copper = 80°C mass of unknown = 70.0g Temperature of unknown = 100°C equilibrium temperature = 20°C a) Q water + Q al = - Q copper- Q unknown Calorimetry Q water = m w c w ΔT specific heat capacity = (250g)(1 cal/g°C)(20°C -10°C)...
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April 20 - General Physics III Homework Assignments Cory...

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