If someone falls asleep sitting in a chair ,no matter how long they are left there where is blood never going to pool

Modify the equation fδt=δ (mv) to find the force of friction.

In a given chemical reaction, the energy of the products is greater than the energy of the reactants. which statement is true for this reaction?

Hydrogen atoms are excited by a laser to the =4n=4 state and then allowed to emit. what is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed from this system? 8 6 2 7 4 5 1 3 calculate the wavelength of the 4⟶14⟶1 transition. =λ=