Abusinessman enters the same revolving door on the right, pushing with 555 n of force directed perpendicular to the door and 0.594 m from the hub, while a boy exerts 376 n perpendicular to the door, 1.45 m to the left of the hub. (a) find the torques exerted by each person.

what direction is considered positive for torque? that is, find out if clockwise or counterclockwise is positive.
what direction is the torque exerted by the boy? n

Explanation:

It is given that,

Force acting on the door,

Perpendicular distance,

The torque acting on the business man is given by :

.........(1)

Force applied by the boy,

Perpendicular distance,

The torque acting on the boy is given by :

.........(2)

From equation (1) and (2) it is clear that the force applied by the business man is less than the boy.

Let clockwise direction is taken as positive while counterclockwise direction is negative. As the boy is pushing to the left of the hub. So, the direction of the torque exerted by the boy is counterclockwise. Hence, this is the required solution.

radiation

explanation:

heat is transmitted by radiation

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me