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A proposed ocean thermal energy conversion (OTEC) system is a heat engine that would operate between warm water (18 degree Celsius) at the ocean's surface and cooler water (4 degree Celsius) 1,005 meter below the surface. Calculate the maximum possible efficiency of the system?
An ultrasound unit is being used to measure a patient's heartbeat by combining the emitted 2.0 MHz signal with the sound waves reflected from the moving tissue of one point on the heart. What is the maximum speed of the heart tissue
A merry-go-round of radius 3.0 m, initially at rest, is givena constant tangential push for 1.5s. What is the angular displacement of the wheel between t=0 and t=4s
Determine the moment of inertia for three children weighing 57.0 lb, 42.0 lb and 78 lb sitting at different points on the edge of a rotating merry-go-round, which has a radius of 12 ft.
An 68.0-m-long brass rod is struck at one end. A person at the other end hears two sounds as a result of two longitudinal waves, What is the time interval between the two sounds
A bomb is dropped from an airplane in level flight at a speed of 970 km/h. The altitude of the aircraft is 2000 m. At what horizontal distance from the initial position of the aircraft will the bomb land.
A box rests on top of a flat bed truck. The box has a mass of m = 18.0 kg. The coefficient of static friction between the box and truck is ?s = 0.82, what is the frictional force the truck exerts on the box
A hot-air balloon is accelerating upward under the influence of two forces, its weight and the buoyant force. What is the acceleration of the rising balloon
a child does 350 J of work while pulling a box from the ground up to his tree house with a rope the tree house is 8.4 m above the ground
A vertical straight wire carrying an upward 24-A current exerts an attractive force per unit length of 8.8 *10-4 N/m on a second parallel wire 7.0cm away. What current (magnitude and direction) flows in the second wire?
If, in actuality, a 750 kg car with an initial speed of 96.0 km/h is observed to coast up a hill to a height of 17.0 m above its starting point, how much thermal energy was generated by friction
A 200-turn circular loop of radius 55 cm is vertical, with its axis on a line running east to west. What is the magnitude of the torque on the loop
A horizontal 810-N merry-go-round of radius 1.30 m is started from rest by a constant horizontal force of 45 N applied tangentially to the merry-go-round
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