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1. What are typical efficiencies associated with swimming and how can they be improved?
2. Explain how local ionization of flowing air can accelerate it. How can this be useful?
3. Discuss the main causes of loss of available energy in a turbo-pump and how they can be minimized. What are typical turbo-pump efficiencies?
4. Discuss the main causes of loss of available energy in a turbine and how they can be minimized. What are typical turbine efficiencies?
A man drags a 72.0 kg crate across the floor at a constant velocity by pulling on a strap attached to the bottom of the crate. The crate is tilted 26 degrees above the horizontal, and the strap is inclined 68 degrees above the horizontal. The center ..
The electric field just above the surface of the charged drum of a photocopying machine has a magnitude E of 2.7 x 105 N/C. What is the total charge in coulombs on the drum
The electric field in a region of space is given by the function E = Γx2x^ where Γ is a constant with value Γ = 120 N/C/m2 a) Compute the potential difference ?VAB between the point A at x = 2 m and the point B at x = 4 m. b) Explain how you selected..
A ball of mass 0.30 kg is fired with velocity 160 m/s into the barrel of a spring gun of mass 2.5 kg initially at rest on a frictionless surface. What fraction of the ball's initial kinetic energy is stored in the spring
Compare the torque-transmitting strength of a solid round shaft with that of a solid square shaft of the same size (circle diameter equal to side of square). Compare the weight of the two shafts and also the ratio of strength to weight.
Lightning occurs when there is a flow of electric charge (principally electrons) among the ground and a thundercloud. The maximum rate of charge in a lightning bolt is about 20,000 C/s; this lasts for 100 us or less. How many electrons flow during th..
A company has determined its corporate mission is to pollute the world. Compute the mass of the can of toxic goo
Using the graph method (head-to tail method or parallelogram method), determine the resultant and equilibrant vector (magnitude and direction)
A stuntman sitting on a tree limb wishes to drop vertically onto a horse galloping under the tree. The constant speed of the horse is 10.0 m/s, How long is he in the air
question a rectangular piece of paper is folded so that one corner lands on the opposite corner. the crease is as long
Two guitarists attempt to play the same note of wavelength 6.50cm at the same time, What is the frequency of the beat these musicians hear when they play together
A charged oil droplet falls 5.0 mm in 20.0 s at terminal speed in the absence of an electric field. What are the mass and radius of the drop
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