You have three charged particles that are initially very far apart from one another, and you must bring then together to form an equilateral triangle of side length, l. particles a and b each carry a charge -q, and particle c carries a charge 4q. how much work must you do to form the triangle? how much work must you do to rearrange the particles so that they are in a straight line with particle c in the center and a distance l between adjacent particles?

answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.

conservation of mass

mass before something happens = mass afterwards

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000