It's caused by blood pooling in the legs, so there's insufficient return to the heart and brain. Normally, moving one's legs helps to pump blood back to the heart through muscle contraction. Locking the knees makes standing still easier, but reduces use of the leg muscles. In some people, this pooling may lead to hypoperfusion of the brain and fainting, which is essentially the body's way of putting the brain and the legs and the heart at the same level.
Robert Hooke discovered cell structure and named cell
Butane, C₄H₁₀ will undergo only London dispersion forces when interacting with other molecules of the same kind.
London dispersion force:
- The weakest intermolecular force is called the London dispersion force.
- When the electrons in two nearby atoms occupy positions that cause the atoms to temporarily form dipoles, the resulting transient attractive attraction is known as the London dispersion force.
- There are instances when this force is referred to as an induced dipole-induced dipole attraction.
Butane molecules only exhibit London dispersion forces because they are non-polar and have a symmetrical distribution of electron density.
<u><em>Butane:</em></u>
- It is a covalent non-polar molecule. Every C-C and C-H bond is non-polar. This is because there is little or no electronegativity difference between C and C in C-C bonds and none between C and H in C-H bonds.
Learn more about the London dispersion force here,
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The organ that creates urea are the kidneys..
