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A closed hollow sphere of radius R=60.0cm (the surface area of asphere of radius R is 4πR^2) is made of styrofoam havingthermal conductivity k=0.0450 watt/m celsius, A 250 Watt heater isinside the hollow sphere at the center, and it maintains the insideof the box at a constant 40.0 celsius, while the outside of the boxis at 25.0 celsius. The system is in thermal equilibrium, with heatflowing uniformly out of the entire surface of the sphere.
find the thickness(assumed uniform) of the styrofoam wall of thehollow sphere.
An object has a volume of 0.25 m^3 and weighs 3000 N. What will be its apparent weight when submerged in water
A fighter jet is launched from an aircraft carrier with the aid of its own engines and a steam-powered catapult. obtain the work done on the jet by the catapult
A particle has an acceleration of 6.19 m/s^2 for 0.350 s . At the end of this time the particle's velocity is 9.26 m/s What was the particle's initial velocity?
A 5-kg mass moves under the influence of a force F=(2e^t ?)N, where t is time. What is the particle's position as a function of time
An early model of the atom, proposed by Rutherford after his discovery of the atomic nucleus, had a positive point charge, What is the electric field at the surface of the atom
A standing wave on a string is produced when one end is fixed and the other is driven by a 76 Hz oscillator. what is the total length of the string in meters
a pendulum of period 2 s is released from rest at an inclination of 5 degrees to the downward vertical. what is its
On December 3, 2011, Jason sold th ebonds for $383,000 after amortizing $1,000 of the original issue discount. Illustrate what are the nature and amount of Jason's gain or loss?
A heat engine has an efficiency of 35.0% and its power output is 600 W. What is the rate of heat input
During the spin cycle of your clothes washer, the tub rotates at a steady angular velocity of 32.7 rad/s. Find the angular displacement of the tub
Calculate the kinetic energy acquired by a 11 kg nail when it is struck by the 530 kg hammer moving with an initial speed of 4.4m/s.
A 15.0N package of whole wheat flour is suddenly placed on the pan of a scale such as you find in grocery stores. If the pan has negligible weight, find the maximum distance the spring will be compressed
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