Abumblebee flying through the air picks up a net charge of +40 pc, due in part to the triboelectric effect (charge transfer by friction) from collision with small dust particles*. the presence of this positive charge on their bodies the bumblebees locate negatively charged flowers when foraging for pollen and nectar**. the natural electric field near the surface of the earth has an average magnitude of 120 n/c and is directed downward. the mass of a typical bumblebee is 0.10 grams. calculate the ratio of the coulomb force on the bee to the gravitational force on the bee. note that (1pc = 10^{-12} c)(1pc=10 −12 c). [for small number answers, use the scientific “e” notation : 0.0076 = 7.6e-3 ]

Explanation:

The Coulomb force on the bee is:

where

is the charge of the bee

is the magnitude of the electric field

Substituting into the formula,

The gravitational force on the bee is

where

is the bee's mass

is the gravitational acceleration

Substituting into the formula,

So, the ratio between the two forces is

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19