One mole of nickel (6 1023 atoms) has a mass of 59 grams, and its density is 8.9 grams per cubic centimeter. You have a long thin bar of nickel, 2.7 m long, with a square cross section, 0.06 cm on a side. You hang the rod vertically and attach a 27 kg mass to the bottom, and you observe that thebar becomes 1.38 cm longer. From thesemeasurements, it is possible to determine the stiffness of one inter-atomic bond in nickel.1) What is the spring stiffness of the entire wire, considered as asingle macroscopic (large scale), very stiff spring? 2) How many side-by-side atomic chains (long springs) are there in this wire? This is the same as the number ofatoms on the bottom surface of the nickel wire. Note that the cross-sectional area ofone nickel atom is (2.23 10-10)2 m2.3) How many interatomic bonds are there in one atomic chain running the length of the wire?4) What is the stiffness of a single interatomic "spring"?

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.

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

a displacement distance is size of displ

answer and explanation;