Suppose two point charges, Q1 and Q2, are separated by a distance d. Which correctly states Coulomb's Law for the electrical force between them?

A)
F = k·Q1·Q2·d2

B)
F = k·Q1·Q2
d2

C) F = k/Q1·Q2·d2

D) F = k·d2/Q1·Q2

Explain vector addition, triangle method and parallelogram method

Describe different biomes. what are some adaptations that organisms (plants or animals) must have to live in each biome?

The uniform slender bar rests on a smooth horizon- tal surface when a force f is applied normal to the bar at point a. point a is observed to have an initial acceleration aa of 20 m/s2, and the bar has a corre- sponding angular acceleration of 18 rad /s2. deter- mine the distance b.