Krishne wants to measure the mass and volume of a key. which tools should she use? a balance and a beaker of water a balance and a meter stick a beaker of water and a ruler a ruler and a meter stick

the answer is A

potential energy is directly proportional to height.

more height = more potential energy.

greatest increase in height = greatest increase in potential energy

where are the points with the greatest increase in height ?

has to be c-e or d-e .

c) up is the direction the magnetic force is acting on the charge.