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Question: A system consists of 0.697 kg of water at 80 degrees C. A paddle wheel does 42 kJ of work stirring the water. The heat energy lost to the environment is 15 kJ. What is the final temperature of the system in degrees C?
question a 30-turn 11.5 cm diameter coil is placed between the pole pieces of an electromagnet. when the magnet is
The average frictional force exerted on him by the pole has a magnitude of 815 N, and his speed at the bottom of the pole is 3.7 m/s. Explain how far did he slide down the pole?
Delivery trucks that operate by making use of energy stored in a rotating flywheel have been used in Europe. What is the kinetic energy of the flywheel after charging
A net force that is quadratically increasing in time is applied to an object. What is time dependence of the object's kinetic energy
You place 73 moles of hydrogen gas in a balloon of volume 2.6 m3, and find the pressure to be 1.4 times atmospheric pressure. What is the typical speed of a hydrogen molecule?
A rotating wheel requires 3.08-s to rotate through 37.0 revolutions. What is the constant angular acceleration of the wheel
Suppose your favorite FM radio station broadcasts at a frequency of 99.9 MHz. What is the wavelenght of this signal
A high fountain of water is located at the center of a circular pool, How high is the fountain
A 68.0 patient is suspended in a raised hospital bed (angle is 50 degrees). What is the maximum mass can be without the patient sliding up the bed
What is the angular velocity of the disk. If a single bit requires 5 µm of length along the motion direction, how many bits/second can the writing head write when it is 3.0 cm from the axis? display all work and explanations.
If the lithospheric plates move on average at 6 cm/yr, what would be a typical recycling time of terrestrial crust
A 2.5-kg block is attached to a spring with k=100 N/m and compress it with a distance of 0.40 m. What is the mechanical energy of the block
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