What is effort arm
don't say the answer of gogle ​

effort arm mean the use of any work by using your hand force motion or by hand power

effort arm is a class of lever

Explanation:

Classes of lever are pivot effort and load

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.

higher potential

explanation:

because it is in a high speed so it must move into a of high potential