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A 100 gram aluminum calorimeter contains 250 gram of water. The two metals are in thermal equilibrium at 10°C. Two metallic blocks are placed in the water. One is a 50 gram piece of copper at 72°C. The other sample has a mass of 73 gram and is originally at a temperature of 100°C. The entire system stabilizes at a final temperature of 20°C. Compute the specific heat of the unknown sample.
J/kg•°C
a solenoid used to produce magnetic fields for research purposes is 2.5m long with an inner radius of 30cm and 1200
in a ski race starting from rest a 65kg skier descends through 120 meters of vertical drop nd finishes his run at 58 miles per hour. how much work is done by the skier
Obler's paradox presented the contrary facts that the universe had to be infinite and uniform in order to be stable and if the universe was infinite the night sky should be as bright the surface of the stars. How was the paradox resolved?
A traffic light, weighing 668N is hung from the center of acable of negligible weight that is stretched horizontally btween two poles that are 18.3m apart. What is the tension in the cable
A horizontal spring is lying on a frictionless surface. One end ofthe spring is attached to a wall whle the other end is connected toa movable object. The spring and object are compressed by0.074 m, released from rest, and subsequently oscillate b..
You're designing a toy rocket to be launched by a spring. The launching apparatus has room for a spring that can be compressed 14cm, and the rocket's mass is 65 g. If the rocket is to reach analtitude of 35 m, what should be the spring constant?
an airplane travels 85 km,62degrees north of east. Its displacement is represented by the vector A in the drawing
You have two identical containers, one containing gas A (mA = 6.64 ×10?27 kg) and one containing gas B (mA = 1.39 ×10?27 kg). At what temperature will you accomplish your goal
an ideal transformer steps down 120 volts to 12.0 volts and the 2630- turn secondary supplies 12.0 amperes. What is the ratio output power to input power
A capacitor is connected across an ac generator whose frequency is 751 Hz and whose peak output voltage is 140 V. What is the magnitude of the maximum charge on one plate of the capacitor
A square with sides of length 2m is perpendicular to a magnetic field of strength 10 T. If the square is rotated by 60 degrees, what is the change in magnetic flux through the square
Water at 22.0 °C is sprayed onto 0.203 kg of molten gold at 1063 °C (its melting point). What is the minimum mass of water that must be used
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