a particle is moving in a straight line with a constant acceleration of 4m/s^2. Initially the particle is a rest of 0, and after t seconds its displacement from 0 to 98. the value of t in seconds is

i believe it is b. what was the cause of the big bang

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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.

your answer is, orbit around the nucleus