Arectangular sign over a store has a weight of 150 lb, with the center of gravity in the center of the rectangle. the support against the wall at point c may be treated as a ball-and-socket joint. at corner d support is provided in the y-direction only. calculate the tensions t1 and t2 in the supporting wires, the total force supported at c, and the lateral force r supported at d. the force r is positive if it points in the +y-direction, and negative if it points in the -y-direction.

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.

dec 23, 2016 - a load of bricks weighing 680 n a distance of 10 m across a parking lot. if if the worker pushes the cart with a constant force of 209 n, what work= force x distance = 220 n x 10 m = 2200 n.m = 2200 j i don't know where the person got it from, but the initial part, work= force x distance me.