Sentences with phrase «lose mechanical energy»
Not exact matches
In 2000, Mariano Garcia, a mechanical engineer at the University of California, Berkeley, and Anindya Chatterjee, a mechanical engineer at Pennsylvania State University in University Park, published a paper showing that a simplified walker with stiff legs and no torso had no gait that did not involve losing some energy when its legs hit the ground.
https://www.scientificamerican.com/
«Our hypothesis was that the granular temperature can increase temporarily because of this, even though mechanical energy is lost with every collision.»
This was originally developed by physicists to quantify lost energy in mechanical systems, such as a steam engine, but entropy can also be used to measure the range or randomness of a system.
On the other hand, Cleland adds, the potential advantage of a mechanical system over an electronic system is that its qubits might intrinsically lose energy more slowly and thus remain in superposition longer, enabling them to perform more useful, complex calculations.
Muscle contraction is pretty inefficient from a metabolic perspective, with around 50 % of the energy produced lost in the form of heat, instead of being used for moving an object (mechanical energy).
Because of the compression limitation required to prevent «engine knock», a typical gasoline engine can only deliver about 25 % efficiency — only 25 % of the BTU's in a gallon of gasoline are converted to mechanical energy that turns the wheels of the car, the other 75 % is lost in waste heat.
Also, some of the energy used to overcome inertia and accelerate the vehicle — normally lost when the vehicle is slowed, to aerodynamic forces and rolling resistance as well to the mechanical brakes (as heat)-- may be recaptured as electrical energy if regenerative braking is available (see the discussion of hybrid electric drive trains).
OK, so again: ASIDE from all losses and mechanical frictions etc., etc., expended in displacing horizontally without gaining or losing potential gravitational energy, there is a NEW CONDITION with the moved mass.