Range and time of flight down an inclined plane

What is meant by linear equilibrium? Select all possible answer/s.

• The net force is equal to zero

• Fnet=0

• a=0

• F 1 on 2 = - F 2 on 1

What was the historical takeaway from the Michelson & Morley experiment?

• It demonstrated there was no luminiferous aether.

• It demonstrated light must move at the same speed regardless of reference frame.

• It demonstrated light was a wave phenomena.

• It demonstrated that the speed of light was relative.

Crystallography

• science of measuring the crystal structure of a crystal

• science of combining crystals with another crystals

• science of determining the color of a crystal

• science of measuring the reactants of a crystal

What astronomer was the firs to nail down a concrete measure of the speed of light?

• Newton

• Galileo

• Romer

• Plato

How many postulates are there in the special theory of relativity?

• 1
• 2
• 3
• 4

With reference to that same aeroplane, the angle from North at which the plane flies over the ground is given by

• $\cos^{-1}\left(\frac{a}{b}\right)$

• $\sin^{-1}\left(\frac{b}{a}\right)$

• $\tan^{-1}\left(\frac{a}{b}\right)$

• $\tan^{-1}\left(\frac{b}{a}\right)$

Pushing against the wall. Is it an example of work?

• NO

• YES

• MAYBE

• I am not sure

What is your position in your own reference frame?

• $x=ct$

• $x=vt$

• $x=0$

• $x=\frac{cv}{t}$

There are nine different possible combinations of which represents a distinct crystal system.

• True

• False

Which has an Interaxial Angles of

 $\alpha=\gamma=90\degree\ne\beta$  ?

• Monoclinic

• Triclinic

• Hexagonal

• None of this