What is the wavelength of a wave?

a. the distance traveled by the wave during one full cycle
b. the amount of cycles that occur in a given time
c. the distance from the beginning to the end of a cycle
d. the amount of time that one full cycle takes

Two red blood cells each have a mass of 9.0 multiply.gif 10-14 kg and carry a negative charge spread uniformly over their surfaces. the repulsion arising from the excess charge prevents the cells from clumping together. one cell carries −2.50 pc of charge and the other −3.10 pc, and each cell can be modeled as a sphere 7.5 μm in diameter. (a) what speed would they need when very far away from each other to get close enough to just touch? assume that there is no viscous drag from any of the surrounding liquid. answer is: 321 m/s how do i find this (b) what is the maximum acceleration of the cells in part (a)? answer is: 1.38e+10 m/s2 how did they find this answer

How would doubling the made of an object change the objects potential energy

Which is the best for showing percentages of different types of cars sold(gas hybrid , electric , other ) in the united states ?