what is the shape of the line graph that shows the temperature change over time of the liquid before it starts to boil?​

Because you said over time then shape of curve depends on heat input and mass of fluid and specific heat of 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.