How can a lever system work at a mechanical disadvantage but still be of use to us?
What will be an ideal response
A lever that operates with the load far from the fulcrum and the effort applied near the fulcrum is operating at a disadvantage in terms of power, but the advantage is that the load can move over large distances at a rapid rate. Wielding a shovel is an example.
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The molecular formula for bicarbonate ion is HCO3-. It is therefore a
A. polyatomic anion.?B. polyatomic cation.?C. radioactive isotope.?D. cationic compound.
Intermolecular forces are weak electrostatic attractions that exist between
A. two protons. B. two molecules. C. two atoms.
Drugs called calcium channel blockers may be used to lower blood pressure by causing arteries to vasodilate. How do you suppose these drugs work?
A. They prevent calcium from entering the sarcoplasmic reticulum of smooth muscle. B. They prevent calcium from entering cardiac muscle, thus slowing down the heart rate. C. They prevent calcium from entering smooth muscle, thus allowing the muscle to relax. D. They prevent calcium from exiting the sarcoplasmic reticulum in skeletal muscle. E. They stimulate the calcium pump in smooth muscle, thus removing calcium from the calmodulin.
What causes androgen-insensitivity syndrome?
A. Increased estrogen in the developing fetus B. A lack of testosterone in the developing fetus C. A lack of androgen receptors in the developing fetus D. None of these are correct.