Imagine that you’re observing a collision. Which action would allow you to determine whether the collision is inelastic? A.
Measure the force of impact.
B.
Observe whether the colliding objects change their shape.
C.
Measure the acceleration of the colliding objects.
D.
Measure the mass of the colliding objects.

Its B, observe weather the colliding objects change their shape .

Explanation:

I hope this will help you, if not so advance sorry :)

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.

laticia draws the diagram below to show earth’s magnetic field.

answer

the arrows to the right of earth should point up.