Auniform, solid metal disk of mass 6.10 kgkg and diameter 30.0 cmcm hangs in a horizontal plane, supported at its center by a vertical metal wire. you find that it requires a horizontal force of 4.29 nn tangent to the rim of the disk to turn it by 3.40 ∘∘, thus twisting the wire. you now remove this force and release the disk from rest.

10.84406 Nm/rad

0.068625 kgm²

2.00066 rad/s

0.49983 s

Explanation:

F = Force = 4.29 N

R = Radius =

= Angle =

m = Mass of disk = 6.1 kg

Torsional constant is given by

The torsion constant is 10.84406 Nm/rad

Moment of inertia is given by

The moment of inertia is 0.068625 kgm²

Frequency is given by

The frequency is 2.00066 rad/s

Time period is given by

The time period is 0.49983 s

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.