The nand operator (not and) has two inputs and one output. the value of the output is 0 if an only if both inputs are 1. this, you can see, is the not of an and operator. now, recall that an and gate and or gate can each be constructed from two transistors while a not gate can be constructed from one transistor and a resistor. a nand gate can be constructed from two transistors and one resistor. draw the configuration of two transistors and resistor that implement a nand gate.

where is the circuit diagram ?

i am pretty sure it is c because when people are closer together, they cannot move as freely. picture being in a mostly full elevator, for instance. the people are right next to you, and you can barely move.

a.) travels faster in solids because the particles are closer together.

air is a gas water is a liquid

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.