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1) a piece of aluminum of mass .2kg at temperature .2kg at temperature 20C is placed in beaker containing 1.5 kg of water at 80C. Find the final temp after equilibrium is reached
2) How much water at 20C must be added to 1 kg of ice at 0C in order to end up with everything at a final temperature of 10C.
3) A 2 kg piece of metal at 60C is added to .5kg of water at 0C. if the final equilibrium temperature is 28C, what type of metal is it?
4) Briefly describe a possible method for measuring the heat of combustion of a material.
a workman on the scaffolding outside one of the science classrooms drops a wrench. a physics student bored with the
Which of the following is not a valid criterion for the acceptance of a physical law or theory?
A circuit is connected in parallel with two capacitor C1=6F and C2=3F with seperate switches S1,S2 and has a voltage of 20V. capacitor C1 is first charged by closing switch S1. switch S1 is then opened , and charged capacitor is connected to the un..
protons are projected with an initial velocity v0 = 10410m/s into a region where a uniform electric field E = 710 N/C is present. The protons are to hit the target that lies a horizontal distance of 1.27mm from the point where protons are launched..
At what temperature is the root-mean-square speed of nitrogen molecules equal to the root-mean-square speed of hydrogen molecules at 15.0°C? (Hint: The molar mass of Hydrogen is 1.008g/mol and the molar mass of Nitrogen is 14.007 g/mol) of each eleme..
A large tank is divided into two parts by a partition. The first part contains 5 kg of refrigrtant-134a at 80oC, 900 kPa. Determine the work and heat transfer during this process
Assume the car is moving at 72 km/hr when the brake pedal is applied. Assume that the radius of the wheel is 15 cm. What is the maximum power.
What is minimum important in returning blood to the heart? Negative intrathoracic pressure, valves and veins, the pumping action of skeletal muscles, or the pushing of blood by arterial system.
Three capacitors of 2.0, 9.0, and 15.0? F are joined together in parallel. What is their equivalent capacitance
A 2.00-nF capacitor with an initial charge of 5.06 µC is discharged through a 1.28-k? resistor. What is the maximum current in the resistor
You may solve this problem using either tabulated values from the tables or constant specific heats. Calculate the rate of heat addition
A star with the same mass and diameter as the sun rotates about a central axis with aperiod of about 28.4 days. What would be the new rotation period (s) of the star
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