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Proving trigonometry identities.
Prove 1-sinx/1+sinx=sec^2x-2secxtanx + tan^x
Subject:
Mechanical and Materials Engineering
Topic:
Mechanical Components Design
Posting ID:
2218
OTA ID:
102833
Mechanism of operation of hydraulic chairs
I need some information as to the mechanism of the working of chairs using hydraulic lifts to raise or lower them.
Subject:
Mechanical and Materials Engineering
Topic:
Mechanical Components Design
Posting ID:
2415
OTA ID:
101026
7 point hinge system (not a parallelogram)
My problem exists with a hinge system I am trying to devise for a design I am currently working on as part of my final year studying. The problem is with a 7 point hinge system that folds around an origin point. Using parallelograms the hinge system works perfectly, but to open the hinges above approx. 90 degrees causes the pivot points to overlap. This is a major problem, which I believe can be avoided (I've seen it done) but don't know how. I've attached an .pdf file, including drawings, of the hinge system, with as close to the solution I can get with trial and error. Any help would be much appreciated.
Subject:
Mechanical and Materials Engineering
Topic:
Mechanical Components Design
Posting ID:
5029
OTA ID:
102523
questions using multipal choic answers on mechanics
a steel block has a volume of 0.08m3 and a density of 7,840 kg/m3, what is the force fo gravity acting on the block (the weight) in water? A.5362.56N b.6150.64N c.6700.56N or d.7600.18N ?
Subject:
Mechanical and Materials Engineering
Topic:
Mechanical Components Design
Posting ID:
15294
OTA ID:
102862
multipal choice question on mechanics
a car with a mass of 2,000. kilograms is moving around a circular curve at a uniform velocity of 25 meters per second. the curve has a radius of 80 meters. what is the centripetal force on the car? a. 625 N B. 703N c. 15,625 N or d. 20,250 N?
Subject:
Mechanical and Materials Engineering
Topic:
Mechanical Components Design
Posting ID:
15296
OTA ID:
102862
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