PHY-102 Topic 7 Exam 2

PHY-102 Topic 7 Exam 2

Complete Exam 2 according to the directions provided by your instructor.

The exam will cover concepts from Topics 5-7.

PHY-102 Exam 2

1 Which phenomenon of light explains the separation of light into colors in a rainbow?

• Refraction
• The Doppler effect
• Polarization
• Dispersion
• Interference

2 Which of the following waves is NOT an electromagnetic wave?

• Light
• X-rays
• Infrared
• Radio waves
• Sound

3 When ethanol (empirical formula C2H6O) burns, it combines with oxygen and forms carbon dioxide and water. Which of the following is the balanced chemical reaction for the burning of ethanol?

• C2H6O + O2 → CO2 + H2O
• C2H6O + 2 O2 → 2 CO2 + 3 H2O
• 2 C2H6O + 3 O2 → 4 CO2 + 6 H2O
• C2H6O + 3 O2 → 2 CO2 + 3 H2O
• C2H6O + 2 O2 →  2 CO2 + 2 H2O

4 Which of the following best describes what must happen for a solution to form?

• A solid must dissolve in a liquid.
• A substance must dissolve in water.
• A gas must dissolve in a liquid.
• A substance must dissolve in another substance.
• A solid must be heated to its melting point first.

5 Sulfur dichloride is a cherry-red liquid. Which of the following is true about sulfur dichloride?

• It is a covalent molecule with one sulfur atom for each two chlorine atoms.
• It is an ionic compound with one sulfur atom for each two chlorine atoms.
• It is a covalent molecule with two sulfur atoms for each one chlorine atom.
• It is an ionic compound with two sulfur atoms for each one chlorine atom.
• It is a covalent molecule with one sulfur atom for each one chlorine atom.

6 When light travels from air into a piece of glass, a change in direction may occur. What is the name of this phenomenon?

• Interference
• Reflection
• Dispersion
• Refraction
• Polarization

7 In which of the following types of chemical bond is one or more electron(s) completely transferred from one atom to another?

• Metallic bond
• Ionic bond
• Covalent
• Polarized bond

8 Which of the following is not a form of radioactivity?

• Gamma rays
• X-rays
• Beta particles
• Alpha particles

9 Atoms consist of:

• Protons and neutrons only.
• Neutrons and electrons only.
• Electrons only.
• Protons, neutrons, and electrons.

10 Different components of blood can be separated by their densities in a centrifuge.  This is because blood is:

• A solution
• A suspension
• A compound
• An element
• A pure substance

11 The reason carbon dating works is that:

• There is so much non-radioactive carbon dioxide in the air.
• When a plant or animal dies, it stops producing oxygen.
• Plants and animals are such strong emitters of carbon-14.
• After a plant or animal dies, it stops taking in fresh carbon-14.

12 An explosion occurs 3400m away. Given that sound travels at 340 m/s, how long will it take for the sound of the explosion to reach you?

• less than a second
• 3 seconds
• 10 seconds
• 100 seconds

13 Which of the following is NOT a physical property?

• Density
• Flammability
• Hardness
• Melting point

14 Which process supplies the energy converted to electrical energy in a nuclear power plant?

• The release of steam from underground hot springs.
• The fusion of small nuclei.
• The fission of large nuclei.
• The combustion of natural gas.
• The burning of coal.

15 In the periodic table, a set of properties repeat from:

• element to element.
• column to column.
• row to row.
• group to group.

16 What is the ultimate source of all electromagnetic waves?

• Vibrating molecules
• Radio antennas
• Light bulbs
• Vibrating charged particles
• Vibrating atoms

17 Which of the following statements is true?

• Chemical reaction rates vary with the conditions of the reaction, but nuclear decay rates do not.
• Nuclear decay rates vary with the conditions of the reaction, but chemical reaction rates do not.
• Both chemical reaction rates and nuclear decay rates vary with the conditions of the reaction.
• Neither chemical reaction rates nor nuclear decay rates vary with the conditions of the reaction.

18 Oxygen-16, oxygen-17, and oxygen-18 are:

• Different elements.
• Different ions.
• Different isotopes.
• Different materials

19 Radioactive isotopes can be used:

• As a tracer in a medical test.
• To determine the age of an archeological artifact.
• To increase the shelf life of produce.
• All of the above.

20 When two or more waves are at the same place at the same time, which phenomenon occurs?

• Reflection
• Refraction
• Dispersion
• Interference
• Polarization

21 An element is characterized by:

• The number of protons in the atom.
• The mass of the atom.
• The number of neutrons in the atom.
• The size of the atom.

22 When two light nuclei fuse together, mass

• Is conserved.
• Is converted to energy.
• Is created from energy.
• Is increased.

23 If you dip your finger repeatedly into a surface of still water, you create waves. If you dip your finger at a lower rate,

• the higher the frequency and the longer the wavelength.
• the lower the frequency and the shorter the wavelength.
• the lower the frequency and the longer the wavelength.
• the higher the frequency and the shorter the wavelength.

24 The loudness of a sound wave is most closely related to

• The frequency of the vibrations.
• The wavelength of the wave.
• The speed of the wave.
• The amplitude of the vibrations.

25 The primary colors of light are:

• Red, blue, and green
• Red, yellow, and blue
• Magenta, cyan, and yellow
• Green, blue, red and yellow

26 Which of the following is an example of a compound?

• A neon gas.
• Table salt crystals.
• A sample of soil from the yard.
• bar of gold.

27 You perceive the sound of a siren to have a higher frequency when the ambulance is approaching you than when it is receding from you.  Which of the following statements about this observation is true?

• The difference is a figment of your imagination.
• The difference is due different intensities of the sound.
• The difference is caused by the mechanical properties of sound.
• The difference is unique for sound waves and cannot be observed for light.
• The difference is known as the Doppler Effect.

28 Which subatomic particle has a negative charge?

• A proton
• A neutron
• An alpha particle
• A gamma ray
• An electron

29 Which of the following is an example of a chemical change?

• An ice cube melting.
• A sheet of metal being formed into a jewelry box.
• A candle burning.
• A window breaking.

30 Which of the following is an example of a solution?

• The atmosphere.
• Milk
• An Italian salad dressing.
• Muddy water.

Course: PHY-102 Introduction to Physical Science
School: Grand Canyon University

• Due Date (Double Check): 19/09/2021
• Willing to Pay (USD): 120