as the distance between the fulcrum and the r...

as the distance between the fulcrum and the rock increased, the mechanical advantage of the lever j increased. k decreased. l remained the same. m could not be determined. 25 if the distance between the fulcrum and the point of effort force is 10 times greater than the distance between the fulcrum and the point of resistance force, what will be the mechanical advantage of the lever? a less than 5 b 5 c 10 d greater than 10 26 what will happen if a bar magnet is cut into two unequal pieces? j the longer piece will continue to be magnetic, and the shorter piece will stop being magnetic. k the longer piece will stop being magnetic, and the shorter piece will continue to be magnetic. l both pieces will stop being magnetic. m both pieces will continue to be magnetic. 27 what percentage of earth’s surface is covered with water? a 95% b 71% c 50% d 18% 28 where is most of an atom’s mass located? j ion k nucleus l proton m neutron 29 a tissue is best described as a group of a cells. b organs. c organisms. d organelles.

Answer

# Explanation: ## Step1: Recall lever - mechanical advantage formula Mechanical advantage of a lever $MA=\frac{d_{effort}}{d_{resistance}}$. Given $d_{effort} = 10d_{resistance}$, so $MA = 10$. ## Step2: Recall magnet properties A bar - magnet, when cut into two unequal pieces, both pieces will continue to be magnetic because each piece has its own north and south poles. ## Step3: Recall Earth's water - coverage fact About 71% of Earth's surface is covered with water. ## Step4: Recall atom structure Most of an atom's mass is located in the nucleus, which contains protons and neutrons. ## Step5: Recall tissue definition A tissue is a group of cells that work together to perform a specific function. # Answer: 25. C. 10 26. M. Both pieces will continue to be magnetic. 27. B. 71% 28. K. Nucleus 29. A. cells