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Question: Power plant that uses the temperature gradient of the ocean has been proposed. The system is to operate between 21°C (surface temperature) and 6°C (water temperature at a depth of about 1 km). (a) What is the maximum efficiency of such a system? % (b) If the power output of the plant is 85 MW, what is the minimum thermal energy absorbed per hour? J/h (c) In view of your answer to part (a), do you think such a system is worthwhile?
A small metal ball with a charge of 0.45 C and a mass of 34 g (0.034 kg) enters a region where there is a magnetic field of 0.55 T. From Newton's second Law, what is the magnitude of the acceleration of the charged ball
Two blocks of the same mass 0.5 kg head-on collide on a frictionless horizontal surface. The velocities before the collision are v1 = 1.0 m/s, v2 = -3.0 m/s. What is the center-of-mass velocity
The potential energy U(r) between any two atoms, when given as a function of the distance between their centers, do the atoms behavemost like a simple harmonic oscillator
A neutron at rest decays into a proton and a electron. How much Kinetic energy (in MeV) is shared by the electron and the proton?
Two disks have equal masses, m, and radii, R. Their moments of inertia are each .5mR^2. find the acceleration of the center of mass of the lower disk
two trains each having a speed of 30 kmh are headed at each other on the same straight track. a bird that can fly 60
A gas mixture contains 2.50 mol of O2 and 3.00 mol of Ar. What is the molar specific heat at constant pressure for this mixture
Most of the motion generated by joints in the human body are examples of levers. An example of a third class lever is the forearm; the force which generates the motion is located in between the pivot point and the resistance force.
On a cloudless day, the sunlight that reaches the surface of the earth has an intensity of about 1.5 × 103 W/m2. What is the electromagnetic energy contained in 5.0 m3 of space
A 2.5-m long board with a mass of 12 kg is placed on a bar so that it is perfectly balanced, i.e., A 22-kg child sits on the left end of the board. What is the torque they exert on the system
Three horizontal forces (the only horizontal ones) act on a box sitting on a floor. One (call it F1) acts due east and has a magnitude of 150lb, Find the magnitude of the third force
q1. a 485 kg sailboat has an acceleration of 0.50 ms2 at an angle of 51deg north of east. find magnitude and direction
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