Which of the following waves do not travel at speed of light?

• A) Radio waves
• B) Sound waves
• C) Heat waves
• D) X – rays

A balloon is filled with cold air and placed in a warm room. It is NOT in thermal equilibrium with the air of the room until:

• A) It stops expanding
• B) It rises to the ceiling
• C) It sinks to the floor
• D) It starts to contract

The distance between two adjacent bright fringes is:

• A) d/λL
• B) λd /L
• C) λL/d
• D) L/λd

The wavelength of radiation at 1000 kelvin for a black body is:

• A) 2.9×10-3 m
• B) 2.9×10-3 cm
• C) 2.9×10-6 m
• D) 2.9×10-6 cm

Polarization experiments provide evidence that light is:

• A) nearly monochromatic
• B) some type of wave
• C) a longitudinal wave
• D) a transverse wave

A heat of transformation of a substance is:

• A) The same as the heat capacity
• B) The energy absorbed as heat during a phase transformation
• C) The energy per unit mass absorbed as heat during a phase transformation
• D) The same as the specific heat

Two events occur 100m apart with an intervening time interval of 0.60µs.The speed of a reference frame in which they occur at the same coordinate is:

• A) 0.25c
• B) 1.1c
• C) 0.56c
• D) 0

The two metallic strips that constitute some thermostats must di?er in:

• A) Mass
• B) Rate at which they conduct heat
• C) Coe?cient of linear expansion
• D) Thickness Length

The reason there are two slits, rather than one, in a Young’s experiment is:

• A) to increase the intensity
• B) one slit is for frequency, the other for wavelength
• C) to create a path length difference
• D) one slit is for Electric fields , the other is for Magnetic fields

Why do individuals with hypermetropia have difficulty seeing nearby objects clearly?

• A) Eyes focus light behind the retina
• B) Eyes can't detect light wavelengths
• C) Eyes have a perfect focal length
• D) Eyes focus light in front of the retina

The least distance of distinct vision for normal eye:

• A) 5 cm
• B) 10 cm
• C) 50 cm
• D) 25 cm

Metal pipes, used to carry water, sometimes burst in the winter because:

• A) Metal becomes brittle when cold
• B) Metal contractst more han water
• C) Water expands when it freezes
• D) Outside of the pipe contracts more than the inside

The speed of light in a vacuum is approximately:

• A) 3,000 km/s
• B) 300 km/s
• C) 300,000 km/s
• D) 30,000 km/s

How is the mechanical equivalent of heat quantified in terms of calories and joules?

• A) 1 cal = 1 Joule
• B) 1 kcal = 4.186 Joule
• C) 1 cal = 4.186 Joule
• D) 1 kcal = 1 Joule

An erect object is located between a concave mirror and its focal point. Its image is:

• A) Real, inverted, and larger than the object
• B) Real, erect, and larger than the object
• C) Virtual, erect, and larger than the object
• D) Virtual, inverted, and larger than the object

How does a refrigerator differ from a heat engine in terms of its operation?

• A) A refrigerator is always 100% efficient.
• B) A refrigerator is a heat engine working in reverse.
• C) A refrigerator operates at a single temperature.
• D) A refrigerator only absorbs heat.

The "strength" of a lens is measured in _________.

• A) Lense meter
• B) Diopters
• C) Meters
• D) Provatans

In order that a single process is both isothermal and isobaric:

• A) A change of phase is essential
• B) One must use a solid
• C) One may use any real gas such as N2
• D) One must use an ideal gas

For an electron, the rest mass energy is:

• A) 0.711 MeV
• B) 0.511 MeV
• C) 0.411 MeV
• D) 0.611 MeV

In an adiabatic process:

• A) The absorbed as heat equals the change in internal energy
• B) The energy absorbed as heat equals the work done by the system on its environment
• C) The work done by the environment on the system equals the change in internal energy
• D) The energy absorbed as heat equals the work done by the environment on the system