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A system consists of 4.0 kg of water at 85 degrees Celsius 35 J of work is done on the system by stirring with a paddle wheel, whlie 69 J of heat is removed. What is the change in internal energy of the system.
A 900-kg car traveling east at 15.0 m/s collides with a 750-kg car traveling north at 20.0 m/s. The cars stick together. What is the speed of the wreckage just after the collision
Consider the skateboarder in the figure below. If she has a mass of 49 kg, an initial velocity of 23 m/s, what is the work done by friction on the skateboarder
A chemistry student with a mass of 75 kg is riding a steadily moving Ferris wheel. What would the normal force be on the student at the top of the wheel if the wheel's velocity were doubled
What is the amplitude of subsequent oscillations
A disk of radius "r" and uniform surface charge density finalized_jax">\(\sigma\) spins with angular velocity %u03C9 about the y-axis
A 170, 35.0 cm-diameter turntables rotate on frictionless bearings at 53.0. A 20.0 block sits at the center of turntable. A compressed spring shoots the block completely outward along a frictionless groove in the surface of the turntable.
What is Fx of the magnitude of the skiers velocity.
An ideal gas expands at a constant total pressure of 2.5 atm from 3.45 L to 6.70 L. What is the total work done on the gas in the process
how fast is the mass moving when leaves the spring. What is her velocity relative to the ice surface.
Calculate the peak output voltage of a simple generator whose square armature windings are 5.50 cm on a side
A copper wire and an aluminum wire of the same length have the same resistance. What is the ratio of the diameter of the copper wire to that of the aluminum wire
Find out the angle between the filter's polarizing axis and the direction of polarization of light necessary to increase the ratio of the clouds' intensity to that of blue sky so that it is three times the normal value.
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