Physical (11-11)

Which of the following phase changes releases heat?

• W) Melting

• X) Boiling

• Y) Sublimation

• Z) Freezing

How many neutrons does a single atom of carbon-13 possess?

The formation of a mirage in the desert is an example of?

• W) Reflection

• X) Refraction

• Y) Polarization

• Z) Absorption

Expressing your answer in meters, to 2 significant figures, what is the wavelength of a light wave that has a frequency of 200,000 hertz?

Which of the following elements has the lowest atomic number?

• W) Tantalum

• X) Fermium

• Y) Thallium

• Z) Dysprosium

Which of the following statements is true regarding resonance?

• W) A molecule will equilibrate through its resonance structures

• X) All resonance structures contribute equally

• Y) The nitrate ion has three valid resonance structures

• Z) Sigma bonds are most often involved in resonance

Which of the following is true about liquids in general?

• W) Their volume shrinks when becoming a solid

• X) They form droplets due to viscosity

• Y) They are more densely packed than solids

• Z) They always efficiently conduct electricity

Identify all of the following three statements that are true regarding sound: 1) The speed of sound depends on the medium; 2) Sound is a pressure wave; 3) Sound travels faster in water than in air.

• 1) The speed of sound depends on the medium

• 2) Sound is a pressure wave

• 3) Sound travels faster in water than in air

A 0.5-kilogram mass, initially at rest, has a 4-newton force applied to it for 10 seconds. What is the speed, in meters per second, of the mass at the end of the 10 seconds?

• 40

• 20

• 80

• 0

Which of the following quantities is zero for a falling object that has reached terminal velocity?

• W) Velocity

• X) Speed

• Y) Net displacement

• Z) Net force