people who eat at least five servings a day of a 40 percent lower risk
for certain cancers than people who eat only two or fewer servings.

a. fish
b. skim milk and yogurt
c. oats and beans
d. fruits and vegetables

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

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=

Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?