Aman stands on a platform that is rotating (without friction) with an angular speed of 1.0 rev/s; his arms are outstretched and he holds a brick in each hand. the rotational inertia of the system consisting of the man, bricks, and platform about the central vertical axis of the platform is 6.0 kg·m2. by moving the bricks the man decreases the rotational inertia of the system to 2.0 kg·m2.?

Explanation:

Given

angular velocity

Combined moment of inertia of stool,student and bricks

Now student pull off his hands so as to increase its speed to suppose rev/s

After Pulling off hands so final moment of inertia is

Conserving angular momentum  as no external torque is applied

nec chapter 5 contains

c. information on special occupancy areas

nec chapter 6 covers

a. special equipment

which of the following rules contain the words shall or shall not and must be adhered to?

b. mandatory rules

which of the following rules identify actions that are allowed but not required and typically cover options or alternative methods?

c. optional rules

which of the following serves as the introduction to the nec and provides an overview of the book?

a. nec article 90

organizations that test products for safety are

c. nrtls

the nec is published by the

a national fire protection association

the nec is divided into

b. 9 chapters

the nec provides informative annexes for

c. informational materials and examples

two terms from nec article 100 that trainees should become familiar with are

b. labeled and listed

explanation:

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.