Which three temperature readings all mean the same thing?

All the three given represent the same temperature in different scales

Kelvin is absolute temperature where 273 is added to the centigrade value

K = C+273

HEnce 273 Kelvin when converted into centigrade gives

273-273 = 0 degree centigrade

273 K = 0 C

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Fahrenheit to centigrade conversion is

C=

Hence when F=32, we get C=0

Thus all three are one and the same.

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.

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.