1. A sample of aluminum weighing 80.0g at 1980C is placed in a beaker containing 250.g of water at 25.00C. What will be the final temperature of aluminum and water together? Assume no heat is lost to surroundings. The specific heat of water and Aluminum are 4.184J/goC and 0.900J/goC.
1. A sample of aluminum weighing 80.0g at 1980C is placed in a beaker containing 250.g of water at 25.00C. What will be the final temperature of aluminum and water together? Assume no heat is lost to surroundings. The specific heat of water and Aluminum are 4.184J/goC and 0.900J/goC.
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Transcribed Image Text:1. A sample of aluminum weighing 80.0g at 1980C is
placed in a beaker containing 250.g of water at 25.00C.
What will be the final temperature of aluminum and
water together? Assume no heat is lost to surroundings.
The specific heat of water and Aluminum are 4.184J/goC
and 0.900J/goC.
2. A 0.20kg ball is thrown at a speed of 15m/s from a
point 150.m above the ground. If the air resistance is
negligible, what will be the speed when the ball just hits
the ground?
3. The power of a heating element is 6000.W. How much
time (in hours) will it take to supply a 6.5 x107J of energy?
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