Teste

What is a valence electron?

• An electron which is in the innermost shell of the atom is a valence electron

• An electron which is broken free from an atom is a valence electron

• An electron which is in the outermost shell of the atom is a valence electron

What is the primary reason metals are good conductors of electricity?

• They have free-moving electrons

• They are ductile

• They have high melting points

What is the term for the process of a solid turning directly into a gas?

• Deposition

• Sublimation

• Evaporation

What is the pH of an acidic solution?

• precisely 7

• greater than 7

• less than 7

How is a ‘cantilever’ beam supported?

• A ‘cantilever’ beam supported at both ends only

• A ‘cantilever’ beam supported at one end only

• A ‘cantilever’ beam supported at the middle, and at both ends

Which statement is true, regarding the difference between weight and mass?

• 
  Weight is dependent upon gravity, mass is not dependent upon gravity

• Mass and weight are both dependent upon the magnitude of gravity

• Mass is dependent upon gravity, weight is not dependent upon gravity

1 kg is equivalent to:

• 0,45 lb

• 1 lb

• 2,2 lb

What is the center of gravity (CG) of an object?

• is the centre of the Earth, or any other planet with gravity

• is the geometric centre of any object which has mass

• is the point at which the mass of an object is considered to act

In the context of linear motion, what does a negative acceleration indicate?

• The object is moving in the opposite direction.

• The object is speeding up.

• The object is slowing down.

Which of the following describes the motion of a pendulum?

• Linear motion

• Uniform circular motion

• Simple harmonic motion