An amusement park ride spins its occupants in a circle with a radius of 2.30 m. how many revolutions per minute does the ride need to spin at if the riders feel a centripetal acceleration equal to that of the earth’s gravity?

11.67 revolutions per minute

Explanation:

Centripetal acceleration a  =  r ω ²

Where, ω  is angular velocity.

From the question, centripetal acceleration equal to that of the earth’s gravity

                                      g  =  r ω ²

substituting the values of acceleration due to gravity g and radius r                                      

                                   9.8 = 2.30 x ω ²

                                   ω ² =

                                   ω ² = 4.261

                                   ω  =

                                   ω  = 2.06 rad/second

Angular velocity ω =

where T is the period ⇒ time taken to complete one revolution

Substituting the calculated value of ω into the equation to solve for period T

                                    2.06   =

                                    T =

                                    T = 3.05 seconds

The revolutions per minute =

                                             = 11.67 revolutions per minute

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electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia