Spontaneous combustion reactions describe which of the following?
a. A substance that absorbs its own heat of reaction ultimately reaching its autoignition point, at which it self-ignites.
b. The ignition of materials from a piloted ignition source
c. Ignition from a hot surface
d. Combustion in oxygen-rich environments
A
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Spina bifida is the most frequently occurring, permanently disabling, and devastating of all birth defects. It affects approximately one out of every ________ newborns in the United States
a. 100 b. 1,000 c. 10,000 d. 100,000
Which description describes a reverse muscle action in the gluteal muscle?
a. The gluteal muscle reverses action when, from a standing position, a person does hip extension, then bends forward at the waist. b. The gluteal muscle reverses action when, from a standing position, a person does knee flexion with hip extension, then bends forward at the hips. c. The gluteal muscle reverses action when, from a standing position, a person does hip flexion, then bends laterally at the waist. d. The gluteal muscle reverses action when, from a standing position, a person does hip flexion, then bends forward at the hips.