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A large steam pipe is covered with 1.7-cm-thick insulating material of thermal conductivity 0.21 J/(s m °C). How much energy is lost every second when the steam is at 205 °C and the outside of the pipe has a temperature of 20°C? The pipe has a circumference of 8 m and a length of 70 m. Neglect losses through the ends of the pipe.
How much waste heat is produced by an electrical power station that uses 1.45 ? 1014 J of heat input with an efficiency of 38.0%, What is the ratio of waste heat to work output
A 140-m-wide river flows due east at a uniform speed of 3.9 m/s. A boat with a speed of 7.8 m/s relative to the water leaves the south bank pointed in a direction 39o west of north. How long does it take for the boat to cross the river
What is the maximum speed with which a 1060kg car can round a turn of radius 75m on a flat road if the coefficient of static friction between tires and road is 0.80.
A plastic bag is filled with hydrogen at atmospheric pressure and 18.0 oC. Assume that the mass of the bag is negligible and take the temperature of the outside air to be 0 oC. With the help of this "balloon" we want to lift a 44.0 kg girl off her..
A river flows due south with a speed of 2.00m/s{\rm m}/{\rm s} . A man steers a motorboat across the river, Find the horizontal component of the book's velocity
Determine the resolution limit set by diffraction . what average force do you need to apply to stop the sled? Utilize the concepts of impulse and momentum.
The construction of a flat rectangular roof (4.7m x5.3m) allows it to withstand a maximum net outward force of20007N. At what wind speed will this roof blow outward
Illustrate at what horizontal distance, x, from the base of the building will the rock strike the ground? Assume the ground is level and that the side of the building is vertical. The acceleration of gravity is 9.8 m/s2 .
A gold prospector finds a solid rock that is composed solely of quartz and gold. The mass and volume of the rock are, Find the mass of the gold in the rock
A large tank of water is full and has a depth of 10.0 m. What is the pressure at the bottom of the tank
The electric field strength is 40800 N/C inside a parallel-plate capacitor with a 2.2 mm spacing. obtain the proton's speed when it reaches the negative plate
Estimate the number of breaths taken by a human being during an average lifetime
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