The Earth's radius is 6378.1 kilometers. A mad scientist has come up with the simultaneously awesome and terrifying plan to increase the speed of the Earth's rotation until people at the Earth's equator experience a centripetal (radial) acceleration with a magnitude equal to g (9.81 m/s2 ), eectively making them experience weightlessness. If the mad scientist succeeds in their dastardly plan, what would be the new period of the Earth's rotation?

The time period of Earth’s rotation would be 84.4 minutes

Explanation:

Given that,

Centripetal acceleration = 9.81 m/s²

Radius ,r = 6378.1 km

Velocity, v

Centripetal acceleration is

Time period is given by

Hence, the time period of Earth’s rotation would be 84.4 minutes

there is no correct list among the choices you've provided.

the list might look something like this:

-- baby human

-- piccolo

-- flute

-- soprano singer

-- trumpet

-- tenor singer

-- trombone

-- baritone singer

-- baritone horn

-- bass singer

-- tuba

since i had to make up the list myself, i made it easy on myself, and i didn't try to shuffle the string instruments and woodwinds into it too.

b.a device that inputs heat into a cool object