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You have a 85.5-cm-long copper rod with a rectangular cross section of dimensions 5.21 cm by 7.45 cm. You maintain the ends of the rod at 48.7°C and 85.1°C, but otherwise insulate the rod from its environment. Find the heat current through the rod. The thermal conductivity of copper is 385 W/(m·K).
A black thin-walled cylindrical can, 10.0 cm in diameter and 20.0 cm tall is filled with water at 100°C and suspended in a 20°C room. Determine the initial rate of heat transfer due to radiation
A 5.40×10-2- wad of putty is thrown horizontally at the block, hitting it with a speed of 2 and sticking. far does the putty-block system compress spring.
Two masses connected by a rope are being pulled along a frictionless floor by a Force of 10 N. obtain the tension in the rope connecting the two masses
Ultrasonic waves with a frequency of 2.5MHz are used to monitor the heartbeat of a fetus. Calculate the range of beat frequencies observed for motion of the heart toward and away from the monitor
An average force of 201 N is exerted to draw the string back 1.3 m. unless otherwise directed, imagine that air resistance is negligible. Illustrate energy bar graphs to solve the difficulty .
Four point charges have the same magnitude of 2.4 X 10^-12 C and are fixed to the corners of a square that is 4.0 cm on a side. Determine the magnitude of the net electric field
A ball with a mass of .100 kg is on a spring that is 10.0 m above the ground with a spring constant of 543 N/m and has been compressed .125 m. Determine the initial kinetic energy of the ball
You are an engineer in charge of designing a new generation of elevators for a prospective upgrade to the empire state building. Before the state legislature votes on funding for the project.
A converging lens of focal length 18 cm is 30 cm to the left of a diverging lens of focal length - 6 cm. a coin is placed 12 cm to the left of the converging lens. Find (a) location and (b) magnification of the coin's final image.
The angle of incidence at a solid/liquid boundary is 75.9°, and the index of refraction of the solid is n = 1.50. What is the largest index of refraction that the liquid can have
Airflow through a long, 0.2 m^2 air conditioning duct maintains the outer duct surface temperature at 10 C. If the horizontal duct is uninsulated and exposed to air at 35 C in the crawl space beneath a home, what is the heat gain per unit length of t..
A painter is standing on scaffolding that is raised at constant speed. As he travels upward, he accidentally nudges a paint can off the scaffolding and it falls a distance 15.4m to the ground. find the speed of the can just before it hits the groun..
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