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The interior of a house is maintained at 20 degrees Celsius,while the outdoor temperature is -10 degrees Celsius, Thehouse looses heat at the rate of 30kW. At what rate does the entropy of the universe increase because of this irreversible heat flow?
David is driving a steady 21 m/s when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.20 m/s^2 at the instant as David passes.
The molecular mass of helium is 4 g/mol, the Boltzmann's constant is 1.38066×10^?23J/K, the universal gas constant is 8.31451 J/K· mol, What is the average kinetic energy of each helium atom
A person lifts a 5kg cement block a vertical distance of 2.3m and after that aeries the block horizontally a distance of 6m. Determine the work completed by the person and by the force of gravity in this process.
A boxcar of mass 5.32 x 10^4 kg is rolling south at 3.49 m/s when it collides and couples with another boxcar that is rolling north at 5.12 m/s. Find the mass of the boxcar
A charged 2uF capacitor is connected in parallel with 0.5 MOhm resistor. a) How long after the connection is made with the voltage across the capacitor to 75% of its maximum value. b) How much thermal energy will be dissipated across the resistance a..
What must the charge (sign and magnitude) of a particle of mass 1.44g be for it to remain stationary when placed in a downward directed electric field of magnitude 660 N/C.
What is the current in amperes in a wire of radius. The parallel plates in a capacitor, with a plate area of 8.70 cm2 and an air-filled separation of 3.30 mm, are charged by a 8.90 V battery.
a hollow sphere has a mass of 15kg, an inner radius of 12cm and an outer radius of 18cm. What is the rotational inertia of the sphere
A disk of mass M is free to rotate about a fixed horizontal axis. What is the downward acceleration of the mass
The doctors planning a radiation therapy treatment have determined that a 50g tumor needs to receive 0.21J, What is the dose in gray
Given a sphere of charge inside a conductor. The sphere has a radius of 5cm. Find the charge on the outisde of the conductor
High-speed stroboscopic photographs show that the head of a 260 g golf club is traveling at 54 m/s just before it strikes a 46 g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 44 m/s. Find the speed ..
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