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Low back strain can be caused by: Extreme physical exertion. Falling. Bending or crouching repeatedly. Lifting heavy objects if you are not in shape. It can also be caused by emotional stress ...
A pulled muscle occurs when you tear or overstretch some of the muscle fibers. This can happen if you overwork the muscle or twist it too hard. You will probably notice pain and swelling, and the ...
bruising or discoloration. swelling. a “knotted-up” feeling. muscle spasms. stiffness. weakness. In a mild strain, a torn muscle may feel slightly stiff, but still flexible enough for use. A ...
Symptoms. Throwing out your back can cause the following symptoms: back stiffness that keeps you from moving well. intense low back pain. muscle spasms, or intense bouts of muscle tightening and ...
The triangular objects on either side of the flippers that propel the ball toward the opposite side. solenoid. A coil, with another coil or magnet inside, used in flippers, kickers, and other mechanical devices. When the coils are energized, the opposing magnetic fields cause the inner piece to move.
Precomposition with a function probably provides the most elementary notion of pullback: in simple terms, a function of a variable where itself is a function of another variable may be written as a function of This is the pullback of by the function. It is such a fundamental process that it is often passed over without mention.
Pullback (differential geometry) This article is about pullback operations in differential geometry, in particular, the pullback of differential forms and tensor fields on smooth manifolds. For other uses of the term in mathematics, see pullback. Let be a smooth map between smooth manifolds and . Then there is an associated linear map from the ...
Muscle rigidity refers to stiffness or tension in your muscles. This tends to happen when muscles contract for a long period of time, often due to stress. But certain medications and underlying ...